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Disable per-component build when program coverage enabled #5004

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merged 4 commits into from
Jan 7, 2018

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@23Skidoo 23Skidoo commented Jan 7, 2018

Rebased version of #4902 that skips the slow test.

Creating the test program coverage report requires the test runner to know the
build directory for the library component. If per-component builds are enabled,
this is not possible because the library is not in-scope at the same time as the
test component. The only apparent solution that does not require rethinking
per-component builds entirely is to disable it when coverage is enabled.

Resolves: haskell#4798
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23Skidoo commented Jan 7, 2018

Actually, I have a better idea: skip the slow test only on macOS.

@23Skidoo 23Skidoo merged commit c63860c into haskell:master Jan 7, 2018
@23Skidoo 23Skidoo deleted the disable-per-component branch January 7, 2018 07:40
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 22, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

However, the fix for haskell#5213, in haskell#7493, fixes the paths of the testsuite
`.mix` files to the same location as that of the main library component,
which in turn fixes haskell#4798 as well -- meaning the restriction to treat
testsuites per-package (legacy-fallback) is no longer needed.

Lifting this restriction additionally fixes haskell#6440 as we no longer
constrain coverage to per-package builds only, thus allowing multi-libs.

To generate hpc files in the appropriate component directories in the
distribution tree, we move the hack from haskell#7493 from dictating the `.mix`
directories where hpc information is stored to dictating the `.mix`
directories that are included in the call to `hpc markup`.

Fixes haskell#6440, and the already previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 22, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

However, the fix for haskell#5213, in haskell#7493, fixes the paths of the testsuite
`.mix` files to the same location as that of the main library component,
which in turn fixes haskell#4798 as well -- meaning the restriction to treat
testsuites per-package (legacy-fallback) is no longer needed.

Lifting this restriction additionally fixes haskell#6440 as we no longer
constrain coverage to per-package builds only, thus allowing multi-libs.

To generate hpc files in the appropriate component directories in the
distribution tree, we move the hack from haskell#7493 from dictating the `.mix`
directories where hpc information is stored to dictating the `.mix`
directories that are included in the call to `hpc markup`.

Fixes haskell#6440, and the already previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 22, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

However, the fix for haskell#5213, in haskell#7493, fixes the paths of the testsuite
`.mix` files to the same location as that of the main library component,
which in turn fixes haskell#4798 as well -- meaning the restriction to treat
testsuites per-package (legacy-fallback) is no longer needed.

Lifting this restriction additionally fixes haskell#6440 as we no longer
constrain coverage to per-package builds only, thus allowing multi-libs.

To generate hpc files in the appropriate component directories in the
distribution tree, we move the hack from haskell#7493 from dictating the `.mix`
directories where hpc information is stored to dictating the `.mix`
directories that are included in the call to `hpc markup`.

Includes regression tests for haskell#6440 and haskell#4798 (the test for haskell#5213
already exists)

Fixes haskell#6440, and the already previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 23, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

However, the fix for haskell#5213, in haskell#7493, fixes the paths of the testsuite
`.mix` files to the same location as that of the main library component,
which in turn fixes haskell#4798 as well -- meaning the restriction to treat
testsuites per-package (legacy-fallback) is no longer needed.

Lifting this restriction additionally fixes haskell#6440 as we no longer
constrain coverage to per-package builds only, thus allowing multi-libs.

To generate hpc files in the appropriate component directories in the
distribution tree, we move the hack from haskell#7493 from dictating the `.mix`
directories where hpc information is stored to dictating the `.mix`
directories that are included in the call to `hpc markup`.

Includes regression tests for haskell#6440 and haskell#4798 (the test for haskell#5213
already exists)

Fixes haskell#6440, and the already previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 28, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

However, the fix for haskell#5213, in haskell#7493, fixes the paths of the testsuite
`.mix` files to the same location as that of the main library component,
which in turn fixes haskell#4798 as well -- meaning the restriction to treat
testsuites per-package (legacy-fallback) is no longer needed.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we move the hack from haskell#7493 from dictating the `.mix`
directories where hpc information is stored to dictating the `.mix`
directories that are included in the call to `hpc markup`. We also drop
an unnecessary directory in the hpc file hierarchy.

3. To account for internal libraries, we include the mix dirs and
   exposed modules of all (non-indefinite) libraries in the package

4. We only add non-indefinite libraries to the hpc markup command.
    Indefinite libraries and instantiations are ignored as it is not
    obvious what it means for HPC to support backpack, e.g. covering a
    library function that two different instantiations

The combination of (1,3) fix haskell#6440, and adding (4) fixes haskell#6397

Includes regression tests for haskell#6440, haskell#6397, and haskell#4798 (the test for haskell#5213
already exists)

Fixes haskell#6440, haskell#6397, and fixes in a new way the previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 28, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

However, the fix for haskell#5213, in haskell#7493, fixes the paths of the testsuite
`.mix` files to the same location as that of the main library component,
which in turn fixes haskell#4798 as well -- meaning the restriction to treat
testsuites per-package (legacy-fallback) is no longer needed.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we move the hack from haskell#7493 from dictating the `.mix`
directories where hpc information is stored to dictating the `.mix`
directories that are included in the call to `hpc markup`. We also drop
an unnecessary directory in the hpc file hierarchy.

3. To account for internal libraries, we include the mix dirs and
   exposed modules of all (non-indefinite) libraries in the package

4. We only add non-indefinite libraries to the hpc markup command.
    Indefinite libraries and instantiations are ignored as it is not
    obvious what it means for HPC to support backpack, e.g. covering a
    library function that two different instantiations

The combination of (1,3) fix haskell#6440, and adding (4) fixes haskell#6397

Includes regression tests for haskell#6440, haskell#6397, and haskell#4798 (the test for haskell#5213
already exists)

Fixes haskell#6440, haskell#6397, and fixes in a new way the previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 30, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of libraries in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 30, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of libraries in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 30, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of libraries in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Nov 30, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of libraries in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

TODO: Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package...

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

TODO: Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package...

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

TODO: Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package...

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

TODO: Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package...

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

TODO: Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package...

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

TODO: Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package...

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 4, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 5, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 5, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 7, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
alt-romes added a commit to alt-romes/cabal that referenced this pull request Dec 12, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
andreabedini pushed a commit to alt-romes/cabal that referenced this pull request Dec 18, 2023
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
erikd pushed a commit to erikd/cabal that referenced this pull request Apr 22, 2024
This commits re-enables per-component builds when coverage checking is
enabled. This restriction was previously added in haskell#5004 to fix haskell#4798.

- haskell#4798 was subsequently fixed "again" with the fix for haskell#5213, in haskell#7493 by
fixing the paths of the testsuite `.mix` files to the same location as
that of the main library component.

Therefore the restriction to treat testsuites per-package
(legacy-fallback) is no longer needed.

We went further and fixed coverage for internal sublibraries, packages
with backpack (but without generating coverage information for
indefinite and instantiated units -- it is not clear what it would mean
for HPC to support this), and coverage for multi-package projects.

1. We allow hpc in per-component builds

2. To generate hpc files in the appropriate component directories in the
distribution tree, we remove the hack from haskell#7493 and instead determine
the `.mix` directories that are included in the call to `hpc markup` by
passing the list of components in the project from the cabal-install
invocation of test.
We also drop an unnecessary directory in the hpc file hierarchy.

3. To account for internal (non-backpack) libraries, we include the mix
   dirs and modules of all (non-indefinite and non-instantiations)
   libraries in the project

   Indefinite libraries and instantiations are ignored as it is not
   obvious what it means for HPC to support backpack, e.g. covering a
   library function that two different instantiations

4. We now only reject coverage if there are no libraries at all in the
   project, rather than if there are no libraries in the package.

This allows us to drop the coverage masking logic in
cabal.project.coverage while still having coverage of cabal-install
(i.e. cabal test --enable-coverage cabal-install now works without the
workaround)

Even though we allow multi-package project coverage, we still cover each
package independently -- the tix files resulting from all packages are
not combined for the time being.

Multi-package project coverage is fixed in Cabal, however, the
paths to the source files listed in the `.mix` files will be incorrect
because package sources will no longer be in the root of the project
tree, but rather under the subdir with the package. We add an error for
multi-package projects when coverage is enabled, and track lifting this
error in haskell#9493.

Includes tests for haskell#6440, haskell#6397, haskell#8609, and haskell#4798 (the test for haskell#5213 already exists)

Fixes haskell#6440 (internal libs coverage), haskell#6397 (backpack breaks coverage)
, doesn't yet fix haskell#8609 (multi-package coverage report) and fixes in a new way the
previously fixed haskell#4798, haskell#5213.
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