Since CMake 3.21, the Ninja generator now outputs absolute paths to
source files, rather than relative. These paths are what __FILE__ gets
mapped to during compilation, and is what gtest outputs for test
failures. This broke fix-tests, which assumed a build-relative source
path. This change detects when the source file path is absolute, and
converts it to a build-relative one.
Also, on Windows, absolute paths include the drive with a colon
character, so I added matching the colon to the regex for the path
portion.
Change-Id: I065161d65f098023376b7e479d8a24a83beb1df7
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69440
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
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