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84b5bf580c
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 - ``` 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` doesn't recognize `-` as a command-line option. This patch adds support for `-` to mean stdin. Reviewed By: probinson, rnk Differential Revision: https://reviews.llvm.org/D67643
26 lines
734 B
Plaintext
26 lines
734 B
Plaintext
# RUN: echo foo > %t.foo
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# RUN: echo bar > %t.bar
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# Check output pipe.
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# RUN: diff %t.foo %t.foo | FileCheck -allow-empty -check-prefix=EMPTY %s
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# RUN: diff -u %t.foo %t.bar | FileCheck %s && false || true
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# Check input pipe.
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# RUN: cat %t.foo | diff -u - %t.foo
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# RUN: cat %t.foo | diff -u %t.foo -
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# RUN: cat %t.bar | diff -u %t.foo - && false || true
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# RUN: cat %t.bar | diff -u - %t.foo && false || true
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# Check output and input pipes at the same time.
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# RUN: cat %t.foo | diff - %t.foo | FileCheck -allow-empty -check-prefix=EMPTY %s
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# RUN: cat %t.bar | diff -u %t.foo - | FileCheck %s && false || true
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# Fail so lit will print output.
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# RUN: false
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# CHECK: @@
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# CHECK-NEXT: -foo
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# CHECK-NEXT: +bar
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# EMPTY-NOT: {{.}}
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