b163806cdc
When using lit's internal shell, RUN lines like the following accidentally execute an external `diff` instead of lit's internal `diff`: ``` # RUN: program | diff file - # RUN: not diff file1 file2 | FileCheck %s ``` Such cases exist now, in `clang/test/Analysis` for example. We are preparing patches to ensure lit's internal `diff` is called in such cases, which will then fail because lit's internal `diff` cannot currently be used in pipelines and doesn't recognize `-` as a command-line option. To enable pipelines, this patch moves lit's `diff` implementation into an out-of-process script, similar to lit's `cat` implementation. A follow-up patch will implement `-` to mean stdin. Also, when lit's `diff` prints differences to stdout in Windows, this patch ensures it always terminate lines with `\n` not `\r\n`. That way, strict FileCheck directives checking the `diff` output succeed in both Linux and Windows. This wasn't an issue when `diff` was internal to lit because `diff` didn't then write to the true stdout, which is where the `\n` -> `\r\n` conversion happened in Python. Reviewed By: probinson, stella.stamenova Differential Revision: https://reviews.llvm.org/D66574
39 lines
976 B
Plaintext
39 lines
976 B
Plaintext
# RUN: echo 1 > %t.foo
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# RUN: echo 2 >> %t.foo
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# RUN: echo 3 >> %t.foo
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# RUN: echo 4 >> %t.foo
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# RUN: echo 5 >> %t.foo
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# RUN: echo 6 foo >> %t.foo
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# RUN: echo 7 >> %t.foo
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# RUN: echo 8 >> %t.foo
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# RUN: echo 9 >> %t.foo
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# RUN: echo 10 >> %t.foo
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# RUN: echo 11 >> %t.foo
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# RUN: echo 1 > %t.bar
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# RUN: echo 2 >> %t.bar
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# RUN: echo 3 >> %t.bar
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# RUN: echo 4 >> %t.bar
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# RUN: echo 5 >> %t.bar
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# RUN: echo 6 bar >> %t.bar
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# RUN: echo 7 >> %t.bar
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# RUN: echo 8 >> %t.bar
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# RUN: echo 9 >> %t.bar
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# RUN: echo 10 >> %t.bar
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# RUN: echo 11 >> %t.bar
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# Default is 3 lines of context.
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# RUN: diff -u %t.foo %t.bar && false || true
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# Override default of 3 lines of context.
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# RUN: diff -U 2 %t.foo %t.bar && false || true
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# RUN: diff -U4 %t.foo %t.bar && false || true
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# RUN: diff -U0 %t.foo %t.bar && false || true
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# Check bad -U argument.
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# RUN: diff -U 30.1 %t.foo %t.foo && false || true
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# RUN: diff -U-1 %t.foo %t.foo && false || true
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# Fail so lit will print output.
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# RUN: false
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