This patch adds a -r|--relative-paths option to llvm-lit, which when
enabled will print test case names using paths relative to the current
working directory. The legacy default without that option is that test
cases are identified using a path relative to the test suite.
Only the summary report is impacted. That normally include failed tests,
unless unless options such as --show-pass.
Background to this patch was the discussion here
https://discourse.llvm.org/t/test-case-paths-in-llvm-lit-output-are-lacking-the-location-of-the-test-dir-itself/87973
with a goal to making it easier to copy-n-paste the path to the failing
test cases.
Examples showing difference in "Passed Tests" and "Failed Tests":
> llvm-lit --show-pass test/Transforms/Foo
PASS: LLVM :: Transforms/Foo/test1.txt (1 of 2)
FAIL: LLVM :: Transforms/Foo/test2.txt (2 of 2)
Passed Tests (1):
LLVM :: Transforms/Foo/test1.txt
Failed Tests (1):
LLVM :: Transforms/Foo/test2.txt
> llvm-lit --show-pass --relative-paths test/Transforms/Foo
PASS: LLVM :: Transforms/Foo/test1.txt (1 of 2)
FAIL: LLVM :: Transforms/Foo/test2.txt (2 of 2)
Passed Tests (1):
test/Transforms/Foo/test1.txt
Failed Tests (1):
test/Transforms/Foo/test2.txt
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