@__DIR__ and @__FILE__ don't expand abspath in run.

[goropikari]

In Julia v0.7, @__DIR__(@__FILE__) doesn't expand to a string with the absolute path to the directory (file) in run.

For example, package MyModule with following structure:
MyModule.jl

module MyModule
export foo, bar, baz, qux

foo() = println(@__DIR__)
bar() = run(`echo $(@__DIR__)`)
baz() = println(@__FILE__)
qux() = run(`echo $(@__FILE__)`)

end

julia> versioninfo()
Julia Version 0.7.0-DEV.4465
Commit f569ebe9bc* (2018-03-04 15:47 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i5-4460T CPU @ 1.90GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-3.9.1 (ORCJIT, haswell)
Environment:
  JULIA_SHELL = /usr/bin/zsh

julia> using MyModule

julia> foo()
/home/arch/.julia/v0.7/MyModule/src

julia> bar()
/home/arch/ # Current working directory. This line should be same as foo()
Process(`echo /home/arch/`, ProcessExited(0))

julia> baz()
/home/arch/.julia/v0.7/MyModule/src/MyModule.jl

julia> qux()
none # This should be same as baz()
Process(`echo none`, ProcessExited(0))

I think above behavior is non-intuitive. It is more consistent in v0.6.

julia> versioninfo()
Julia Version 0.6.2
Commit d386e40 (2017-12-13 18:08 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i5-4460T CPU @ 1.90GHz
  WORD_SIZE: 64
  BLAS: libopenblas (HASWELL)
  LAPACK: libopenblas
  LIBM: libm
  LLVM: libLLVM-3.9.1 (ORCJIT, haswell)

julia> using MyModule

julia> foo()
/home/arch/.julia/v0.6/MyModule/src

julia> bar()
/home/arch/.julia/v0.6/MyModule/src

julia> baz()
/home/arch/.julia/v0.6/MyModule/src/MyModule.jl

julia> qux()
/home/arch/.julia/v0.6/MyModule/src/MyModule.jl

Tested on ArchLinux.

[JeffBezanson]

I believe this is caused by #3150. Since the parser can't see inside the command string, it is not able to insert source location information for the macro call. We can partially work around it by having the cmd macro pass its location info into shell_parse, which can then pass it on to parse. Or we could fully fix #3150.

[goropikari]

Why doesn't the problem occur on v0.6?

[JeffBezanson]

The way that @__DIR__ works was also changed.

[goropikari]

I understand. Thank you!

[JeffBezanson]

This is still a bug. We only intended to change the implementation of @__DIR__, not its behavior. And because of #3150, the new implementation does not work in this case.

[simeonschaub]

Just noticed that this particular issue should be fixed by #37007 as well.