impellerc cannot open input file in parent or sibling directories on windows #102805
Description
Given the following invocation of impellerc on windows:
C:\Users\Jonah\engine\src\out\host_debug_unopt\impellerc.exe --flutter-spirv --input=..\..\packages\flutter\lib\src\material\shaders\ink_sparkle.frag --spirv=foo
this uses the current directory to look up the provided file path, see
and
With the above invocation this will end up creating a path like:
\\?\C:\Users\Jonah\flutter\examples\hello_world\..\..\packages\flutter\lib\src\material\shaders\ink_sparkle.frag
I don't think the windows utilities were ever tested for opening files that aren't contained with an application directory bundle. If instead the input file is copied to the current directory, then everything works until we hit the next bug:
C:\Users\Jonah\engine\src\out\host_debug_unopt\impellerc.exe --flutter-spirv --input=ink_sparkle.frag --spirv=foo
ink_sparkle.frag
[ERROR:flutter/fml/platform/win/file_win.cc(446)] Could not replace temp file at correct path. File path: \\?\C:\Users\Jonah\flutter\examples\hello_world\foo. Temp file path: \\?\C:\Users\Jonah\flutter\examples\hello_world\foo.temp The process cannot access the file because it is being used by another process.
(32).
Could not write file to foo
FYI @zanderso