From 8aa6fd96607c207a0f9563c583978cd50ddc52a7 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Mon, 7 Sep 2020 22:16:11 -0700
Subject: [PATCH 01/11] build/bin/sage-dist-helpers (sdh_pip_install): Build a
 wheel, store it

---
 build/bin/sage-dist-helpers  | 27 ++++++++++++++--
 build/bin/sage-pip-install   | 62 +++---------------------------------
 build/bin/sage-pip-uninstall | 62 ++++++++++++++++++++++++++++++++++++
 build/make/install           |  1 +
 4 files changed, 91 insertions(+), 61 deletions(-)
 create mode 100755 build/bin/sage-pip-uninstall

diff --git a/build/bin/sage-dist-helpers b/build/bin/sage-dist-helpers
index a4a8c88a29c..603c171e070 100644
--- a/build/bin/sage-dist-helpers
+++ b/build/bin/sage-dist-helpers
@@ -210,10 +210,31 @@ sdh_pip_install() {
         local sudo="$SAGE_SUDO"
         local root=""
     fi
-    $sudo sage-pip-install $root "$@" || \
-        sdh_die "Error installing $PKG_NAME"
-}
+    $sudo sage-pip-uninstall "$@" || \
+        sdh_die "Error uninstalling a previous version of $PKG_NAME"
+
+    sage-python23 -m pip wheel --wheel-dir=. --no-binary :all: --verbose --no-deps --no-index --isolated --no-build-isolation "$@" || \
+        sdh_die "Error building a wheel for $PKG_NAME"
 
+    wheel=""
+    for w in *.whl; do
+        if [ -n "$wheel" ]; then
+            sdh_die "Error: more than one wheel found after building"
+        fi
+        if [ -f "$w" ]; then
+            wheel="$w"
+        fi
+    done
+    if [ -z "$wheel" ]; then
+        sdh_die "Error: no wheel found after building"
+    fi
+
+    $sudo sage-pip-install $root "$wheel" || \
+        sdh_die "Error installing $wheel"
+    mkdir -p "${SAGE_DESTDIR}${SAGE_SPKG_WHEELS}" && \
+        mv "$wheel" "${SAGE_DESTDIR}${SAGE_SPKG_WHEELS}/" || \
+        sdh_die "Error storing $wheel"
+}
 
 sdh_cmake() {
     echo "Configuring $PKG_NAME with cmake"
diff --git a/build/bin/sage-pip-install b/build/bin/sage-pip-install
index 2ff9bd43d3e..5c5279a4c40 100755
--- a/build/bin/sage-pip-install
+++ b/build/bin/sage-pip-install
@@ -1,8 +1,6 @@
 #!/usr/bin/env bash
-# This command is specifically for pip-installing from a local
-# source directory, as opposed to from a package index via package
-# name.  That is, it is for pip-installing Sage spkgs from their
-# extracted upstream sources.
+# This command is specifically for pip-installing a previously
+# built wheel.
 #
 # This ensures that any previous installations of the same package
 # are uninstalled first.
@@ -17,23 +15,7 @@
 #                      This also disables pip's version self-check.
 # --isolated         : Don't read configuration files such as
 #                      ~/.pydistutils.cfg
-# --no-build-isolation:Build the package in the usual Python environment
-#                      (containing the dependencies) instead of an
-#                      "isolated" environment
-pip_install_flags="--ignore-installed --verbose --no-deps --no-index --isolated --no-build-isolation"
-
-# Consume any additional pip install arguments except the last one
-while [ $# -gt 1 ]; do
-    pip_install_flags="$pip_install_flags $1"
-    shift
-done
-
-# Last argument must be "." and will be ignored
-if [ "$1" != "." ]; then
-    echo >&2 "$0 requires . as final argument"
-    exit 1
-fi
-
+pip_install_flags="--ignore-installed --verbose --no-deps --no-index --isolated"
 
 # Note: We need to take care to specify the full path to Sage's Python here
 # to emphasize that this command hould use it, and not the system Python;
@@ -48,50 +30,14 @@ else
     PIP=pip2
 fi
 
-
-# Find out the name of the package that we are installing
-name="$($PYTHON setup.py --name)"
-
-if [ $? -ne 0 ]; then
-    echo >&2 "Error: could not determine package name"
-    exit 1
-fi
-
-if [ $(echo "$name" | wc -l) -gt 1 ]; then
-    name="$(echo "$name" | tail -1)"
-    echo >&2 "Warning: This package has a badly-behaved setup.py which outputs"
-    echo >&2 "more than the package name for 'setup.py --name'; using the last"
-    echo >&2 "line as the package name: $name"
-fi
-
-
 # We should avoid running pip2/3 while uninstalling a package because that
 # is prone to race conditions. Therefore, we use a lockfile while
 # running pip. This is implemented in the Python script sage-flock
 LOCK="$SAGE_LOCAL/var/lock/$PIP.lock"
 
-# Keep uninstalling as long as it succeeds
-while true; do
-    out=$(sage-flock -x $LOCK $PYTHON -m pip uninstall --disable-pip-version-check -y "$name" 2>&1)
-    if [ $? -ne 0 ]; then
-        # Uninstall failed
-        echo >&2 "$out"
-        exit 1
-    fi
-
-    # Uninstall succeeded, which may mean that the package was not
-    # installed to begin with.
-    if [[ "$out" != *"not installed" ]]; then
-        break
-    fi
-done
-
-
 # Finally actually do the installation (the "SHARED" tells pip2/3-lock
 # to apply a shared lock)
-echo "Installing package $name using $PIP"
-
-sage-flock -s $LOCK $PYTHON -m pip install $pip_install_flags .
+sage-flock -s $LOCK $PYTHON -m pip install $pip_install_flags "$@"
 if [ $? -ne 0 ]; then
     echo >&2 "Error: installing with $PIP failed"
     exit 3
diff --git a/build/bin/sage-pip-uninstall b/build/bin/sage-pip-uninstall
new file mode 100755
index 00000000000..e46d07fe8b0
--- /dev/null
+++ b/build/bin/sage-pip-uninstall
@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+# This command ensures that any previous installations of the same package
+# are uninstalled.
+
+# Only argument must be "." and will be ignored.
+if [ $# -gt 1 ]; then
+    echo >&2 "$0 requires . as only argument"
+    exit 1
+fi
+if [ "$1" != "." ]; then
+    echo >&2 "$0 requires . as final argument"
+    exit 1
+fi
+
+# Note: We need to take care to specify the full path to Sage's Python here
+# to emphasize that this command hould use it, and not the system Python;
+# see https://trac.sagemath.org/ticket/18438
+# But now we delegate this to sage-python23.
+PYTHON=sage-python23
+
+# The PIP variable is only used to determine the name of the lock file.
+if [ "$SAGE_PYTHON3" = yes ]; then
+    PIP=pip3
+else
+    PIP=pip2
+fi
+
+# Find out the name of the package that we are installing
+name="$($PYTHON setup.py --name)"
+
+if [ $? -ne 0 ]; then
+    echo >&2 "Error: could not determine package name"
+    exit 1
+fi
+
+if [ $(echo "$name" | wc -l) -gt 1 ]; then
+    name="$(echo "$name" | tail -1)"
+    echo >&2 "Warning: This package has a badly-behaved setup.py which outputs"
+    echo >&2 "more than the package name for 'setup.py --name'; using the last"
+    echo >&2 "line as the package name: $name"
+fi
+
+# We should avoid running pip2/3 while uninstalling a package because that
+# is prone to race conditions. Therefore, we use a lockfile while
+# running pip. This is implemented in the Python script sage-flock
+LOCK="$SAGE_LOCAL/var/lock/$PIP.lock"
+
+# Keep uninstalling as long as it succeeds
+while true; do
+    out=$(sage-flock -x $LOCK $PYTHON -m pip uninstall --disable-pip-version-check -y "$name" 2>&1)
+    if [ $? -ne 0 ]; then
+        # Uninstall failed
+        echo >&2 "$out"
+        exit 1
+    fi
+
+    # Uninstall succeeded, which may mean that the package was not
+    # installed to begin with.
+    if [[ "$out" != *"not installed" ]]; then
+        break
+    fi
+done
diff --git a/build/make/install b/build/make/install
index 0d18185295f..28737726b1b 100755
--- a/build/make/install
+++ b/build/make/install
@@ -20,6 +20,7 @@ export SAGE_PKGCONFIG="$SAGE_LOCAL/lib/pkgconfig"
 export SAGE_LOGS="$SAGE_ROOT/logs/pkgs"
 export SAGE_SPKG_INST="$SAGE_LOCAL/var/lib/sage/installed"
 export SAGE_SPKG_SCRIPTS="$SAGE_LOCAL/var/lib/sage/scripts"
+export SAGE_SPKG_WHEELS="$SAGE_LOCAL/var/lib/sage/wheels"
 
 if [ -z "${SAGE_ORIG_PATH_SET}" ]; then
     SAGE_ORIG_PATH=$PATH && export SAGE_ORIG_PATH

From d369aabcda2feff14b4f1d14fe824e591d8c5c36 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Tue, 8 Sep 2020 12:38:49 -0700
Subject: [PATCH 02/11] build/bin/sage-dist-helpers
 (sdh_store_and_pip_install_wheel): New, factored out from sdh_pip_install

---
 build/bin/sage-dist-helpers | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/build/bin/sage-dist-helpers b/build/bin/sage-dist-helpers
index 603c171e070..918070ec08a 100644
--- a/build/bin/sage-dist-helpers
+++ b/build/bin/sage-dist-helpers
@@ -1,4 +1,4 @@
-# Shell functions for making spkg-install scripts a little easier to write,
+# -*- shell-script -*- functions for making spkg-install scripts a little easier to write,
 # eliminating duplication.  All Sage helper functions begin with sdh_ (for
 # Sage-distribution helper).  Consult the below documentation for the list of
 # available helper functions.
@@ -205,19 +205,34 @@ sdh_pip_install() {
     echo "Installing $PKG_NAME"
     if [ -n "$SAGE_DESTDIR" ]; then
         local sudo=""
-        local root="--root=$SAGE_DESTDIR"
     else
         local sudo="$SAGE_SUDO"
-        local root=""
     fi
     $sudo sage-pip-uninstall "$@" || \
         sdh_die "Error uninstalling a previous version of $PKG_NAME"
 
-    sage-python23 -m pip wheel --wheel-dir=. --no-binary :all: --verbose --no-deps --no-index --isolated --no-build-isolation "$@" || \
+    mkdir -p dist
+    rm -f dist/*.whl
+    sage-python23 -m pip wheel --wheel-dir=dist --no-binary :all: --verbose --no-deps --no-index --isolated --no-build-isolation "$@" || \
         sdh_die "Error building a wheel for $PKG_NAME"
 
+    sdh_store_and_pip_install_wheel
+}
+
+sdh_store_and_pip_install_wheel() {
+    if [ -n "$SAGE_DESTDIR" ]; then
+        local sudo=""
+        # --no-warn-script-location: Suppress a warning caused by --root
+        local root="--root=$SAGE_DESTDIR --no-warn-script-location"
+    else
+        local sudo="$SAGE_SUDO"
+        local root=""
+    fi
+    if [ "$*" != "." ]; then
+        sdh_die "Error: sdh_store_and_pip_install_wheel requires . as only argument"
+    fi
     wheel=""
-    for w in *.whl; do
+    for w in dist/*.whl; do
         if [ -n "$wheel" ]; then
             sdh_die "Error: more than one wheel found after building"
         fi

From 2d435ab90d74d86264d681371034700a8214e6d3 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Tue, 8 Sep 2020 12:39:16 -0700
Subject: [PATCH 03/11] build/pkgs/numpy/spkg-install.in: Install via setup.py
 bdist_wheel

---
 build/pkgs/numpy/spkg-install.in | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/build/pkgs/numpy/spkg-install.in b/build/pkgs/numpy/spkg-install.in
index 8080a3115e0..c4343132954 100644
--- a/build/pkgs/numpy/spkg-install.in
+++ b/build/pkgs/numpy/spkg-install.in
@@ -23,7 +23,7 @@ export NUMPY_FCONFIG="config_fc --noopt --noarch"
 
 sage-python23 setup.py \
         --no-user-cfg \
-       install \
-       --single-version-externally-managed \
-       --root "$SAGE_DESTDIR" \
-       ${NUMPY_FCONFIG} || sdh_die "Error building / installing numpy"
+       bdist_wheel \
+       ${NUMPY_FCONFIG} || sdh_die "Error building wheel for numpy"
+
+sdh_store_and_pip_install_wheel .

From 55993b6e25560af5e582aed7fcfbb56d317b92fe Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Tue, 8 Sep 2020 12:49:07 -0700
Subject: [PATCH 04/11] build/bin/sage-dist-helpers: Fixup

---
 build/bin/sage-dist-helpers | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build/bin/sage-dist-helpers b/build/bin/sage-dist-helpers
index 918070ec08a..3e1ce59ca39 100644
--- a/build/bin/sage-dist-helpers
+++ b/build/bin/sage-dist-helpers
@@ -216,7 +216,7 @@ sdh_pip_install() {
     sage-python23 -m pip wheel --wheel-dir=dist --no-binary :all: --verbose --no-deps --no-index --isolated --no-build-isolation "$@" || \
         sdh_die "Error building a wheel for $PKG_NAME"
 
-    sdh_store_and_pip_install_wheel
+    sdh_store_and_pip_install_wheel .
 }
 
 sdh_store_and_pip_install_wheel() {

From 0a646747dbf7c823030e1b23419348ff795a0661 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Tue, 8 Sep 2020 12:49:41 -0700
Subject: [PATCH 05/11] build/pkgs/gambit/spkg-install.in: Install via
 bdist_wheel

---
 build/pkgs/gambit/spkg-install.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/build/pkgs/gambit/spkg-install.in b/build/pkgs/gambit/spkg-install.in
index b09d901dbd1..9e2f7964129 100644
--- a/build/pkgs/gambit/spkg-install.in
+++ b/build/pkgs/gambit/spkg-install.in
@@ -11,8 +11,9 @@ cd src/python
 rm gambit/lib/libgambit.cpp
 
 # pip doesn't work (https://github.com/gambitproject/gambit/issues/207)
-sage-python23 setup.py --no-user-cfg build install
+sage-python23 setup.py --no-user-cfg bdist_wheel
 if [ $? -ne 0 ]; then
     echo "Error installing Python API"
     exit 1
 fi
+sdh_store_and_pip_install_wheel .

From ca586938cbdd91114a10dd3364201c8076412485 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Tue, 8 Sep 2020 12:49:59 -0700
Subject: [PATCH 06/11] build/pkgs/pillow/spkg-install.in: Install via
 bdist_wheel

---
 build/pkgs/pillow/spkg-install.in | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/build/pkgs/pillow/spkg-install.in b/build/pkgs/pillow/spkg-install.in
index 18bc8c730df..97fb3066cc6 100644
--- a/build/pkgs/pillow/spkg-install.in
+++ b/build/pkgs/pillow/spkg-install.in
@@ -19,6 +19,6 @@ sage-python23 setup.py \
        build_ext \
        --debug \
        --disable-jpeg \
-       install \
-       --single-version-externally-managed \
-       --root "$SAGE_DESTDIR" || sdh_die "Error building/installing Pillow"
+       bdist_wheel || sdh_die "Error building/installing Pillow"
+
+sdh_store_and_pip_install_wheel .

From 5a747c48eca1be0104c202e4922e5386aa794d08 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Wed, 9 Sep 2020 10:26:07 -0700
Subject: [PATCH 07/11] build/bin/sage-pip-{install,uninstall}: Remove pip2
 support

---
 build/bin/sage-pip-install   | 8 ++------
 build/bin/sage-pip-uninstall | 8 ++------
 2 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/build/bin/sage-pip-install b/build/bin/sage-pip-install
index 5c5279a4c40..adaa4e1f2d8 100755
--- a/build/bin/sage-pip-install
+++ b/build/bin/sage-pip-install
@@ -24,13 +24,9 @@ pip_install_flags="--ignore-installed --verbose --no-deps --no-index --isolated"
 PYTHON=sage-python23
 
 # The PIP variable is only used to determine the name of the lock file.
-if [ "$SAGE_PYTHON3" = yes ]; then
-    PIP=pip3
-else
-    PIP=pip2
-fi
+PIP=pip3
 
-# We should avoid running pip2/3 while uninstalling a package because that
+# We should avoid running pip while installing a package because that
 # is prone to race conditions. Therefore, we use a lockfile while
 # running pip. This is implemented in the Python script sage-flock
 LOCK="$SAGE_LOCAL/var/lock/$PIP.lock"
diff --git a/build/bin/sage-pip-uninstall b/build/bin/sage-pip-uninstall
index e46d07fe8b0..95c699ae87e 100755
--- a/build/bin/sage-pip-uninstall
+++ b/build/bin/sage-pip-uninstall
@@ -19,11 +19,7 @@ fi
 PYTHON=sage-python23
 
 # The PIP variable is only used to determine the name of the lock file.
-if [ "$SAGE_PYTHON3" = yes ]; then
-    PIP=pip3
-else
-    PIP=pip2
-fi
+PIP=pip3
 
 # Find out the name of the package that we are installing
 name="$($PYTHON setup.py --name)"
@@ -40,7 +36,7 @@ if [ $(echo "$name" | wc -l) -gt 1 ]; then
     echo >&2 "line as the package name: $name"
 fi
 
-# We should avoid running pip2/3 while uninstalling a package because that
+# We should avoid running pip while uninstalling a package because that
 # is prone to race conditions. Therefore, we use a lockfile while
 # running pip. This is implemented in the Python script sage-flock
 LOCK="$SAGE_LOCAL/var/lock/$PIP.lock"

From 9ee21109dfb001feec2b032c197defb91cc75783 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Wed, 16 Sep 2020 18:04:20 -0700
Subject: [PATCH 08/11] build/bin/sage-dist-helpers: Also use $sudo for storing
 the wheel file

---
 build/bin/sage-dist-helpers | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build/bin/sage-dist-helpers b/build/bin/sage-dist-helpers
index 3e1ce59ca39..70815c16da1 100644
--- a/build/bin/sage-dist-helpers
+++ b/build/bin/sage-dist-helpers
@@ -247,7 +247,7 @@ sdh_store_and_pip_install_wheel() {
     $sudo sage-pip-install $root "$wheel" || \
         sdh_die "Error installing $wheel"
     mkdir -p "${SAGE_DESTDIR}${SAGE_SPKG_WHEELS}" && \
-        mv "$wheel" "${SAGE_DESTDIR}${SAGE_SPKG_WHEELS}/" || \
+        $sudo mv "$wheel" "${SAGE_DESTDIR}${SAGE_SPKG_WHEELS}/" || \
         sdh_die "Error storing $wheel"
 }
 

From d7aac84ab4dd86ad6203a99eb82371c1d2a46363 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Wed, 16 Sep 2020 18:04:58 -0700
Subject: [PATCH 09/11] src/doc/en/developer/packaging.rst: Update sdh_...
 documentation

---
 src/doc/en/developer/packaging.rst | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/src/doc/en/developer/packaging.rst b/src/doc/en/developer/packaging.rst
index c718c1d3644..a909cc16f22 100644
--- a/src/doc/en/developer/packaging.rst
+++ b/src/doc/en/developer/packaging.rst
@@ -368,12 +368,26 @@ begin with ``sdh_``, which stands for "Sage-distribution helper".
    arguments. If ``$SAGE_DESTDIR`` is not set then the command is run
    with ``$SAGE_SUDO``, if set.
 
-- ``sdh_pip_install [...]``: Runs ``pip install`` with the given
-   arguments, as well as additional default arguments used for
-   installing packages into Sage with pip. Currently this is just a
-   wrapper around the ``sage-pip-install`` command. If
-   ``$SAGE_DESTDIR`` is not set then the command is run with
-   ``$SAGE_SUDO``, if set.
+- ``sdh_pip_install [...]``: The equivalent of running ``pip install``
+   with the given arguments, as well as additional default arguments used for
+   installing packages into Sage with pip. The last argument must be
+   ``.`` to indicate installation from the current directory.
+
+   ``sdh_pip_install`` actually does the installation via ``pip wheel``,
+   creating a wheel file in ``dist/``, followed by
+   ``sdh_store_and_pip_install_wheel`` (see below).
+
+- ``sdh_store_and_pip_install_wheel .``: The current directory,
+   indicated by the required argument ``.``, must have a subdirectory
+   ``dist`` containing a unique wheel file (``*.whl``).
+
+   This command (1) moves this wheel file to the
+   directory ``$SAGE_SPKG_WHEELS`` (``$SAGE_LOCAL/var/lib/sage/wheels``)
+   and then (2) installs the wheel in ``$SAGE_LOCAL``.
+
+   Both of these steps, instead of writing directly into ``$SAGE_LOCAL``,
+   use the staging directory ``$SAGE_DESTDIR`` if set; otherwise, they
+   use ``$SAGE_SUDO`` (if set).
 
 - ``sdh_install [-T] SRC [SRC...] DEST``: Copies one or more files or
    directories given as ``SRC`` (recursively in the case of

From 9b7c7a04d658838ce511e352edb9c03f42c4a7f2 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Wed, 16 Sep 2020 18:07:43 -0700
Subject: [PATCH 10/11] build/bin/sage-pip-{install,uninstall}: Fix typo in
 comment

---
 build/bin/sage-pip-install   | 2 +-
 build/bin/sage-pip-uninstall | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/build/bin/sage-pip-install b/build/bin/sage-pip-install
index adaa4e1f2d8..ffae57342f0 100755
--- a/build/bin/sage-pip-install
+++ b/build/bin/sage-pip-install
@@ -18,7 +18,7 @@
 pip_install_flags="--ignore-installed --verbose --no-deps --no-index --isolated"
 
 # Note: We need to take care to specify the full path to Sage's Python here
-# to emphasize that this command hould use it, and not the system Python;
+# to emphasize that this command should use it, and not the system Python;
 # see https://trac.sagemath.org/ticket/18438
 # But now we delegate this to sage-python23.
 PYTHON=sage-python23
diff --git a/build/bin/sage-pip-uninstall b/build/bin/sage-pip-uninstall
index 95c699ae87e..3326880cf78 100755
--- a/build/bin/sage-pip-uninstall
+++ b/build/bin/sage-pip-uninstall
@@ -13,7 +13,7 @@ if [ "$1" != "." ]; then
 fi
 
 # Note: We need to take care to specify the full path to Sage's Python here
-# to emphasize that this command hould use it, and not the system Python;
+# to emphasize that this command should use it, and not the system Python;
 # see https://trac.sagemath.org/ticket/18438
 # But now we delegate this to sage-python23.
 PYTHON=sage-python23

From 4135e8b236d2e5491b3ee96cbd00196dc5b6e036 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Wed, 16 Sep 2020 18:08:32 -0700
Subject: [PATCH 11/11] build/bin/sage-pip-install: Remove an outdated comment

---
 build/bin/sage-pip-install | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/build/bin/sage-pip-install b/build/bin/sage-pip-install
index ffae57342f0..077d8e0f58c 100755
--- a/build/bin/sage-pip-install
+++ b/build/bin/sage-pip-install
@@ -1,9 +1,6 @@
 #!/usr/bin/env bash
 # This command is specifically for pip-installing a previously
 # built wheel.
-#
-# This ensures that any previous installations of the same package
-# are uninstalled first.
 
 # Default arguments for all packages installed with `pip install`
 # --ignore-installed : Force pip to re-install package even if it thinks it's