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Instead of anchoring these checks with "^\s*", just check that the
usage is preceded by a word boundary. So now we can catch
test $cond && export foo=bar
just like we already catch
test $cond &&
export foo=bar
As a side effect, this will detect usage of "sed -i", "echo -n", "test
a == b", and "export a=b" in comments. That is not ideal but it's
potentially useful because people sometimes copy code from comments so
it can be good to also avoid nonportable patterns there.
To avoid false positives, keep the checks for 'declare' and 'which'
anchored. Those are frequently used words in normal English-language
comments.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Some shells do not understand the one-line construct, and instead need
FOO=bar &&
export FOO
Detect this in the test-lint target.
Signed-off-by: Thomas Rast <trast@inf.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add the perl script "check-non-portable-shell.pl" to detect
non-portable shell syntax.
"echo -n" is an example of a shell command working on Linux, but not
on Mac OS X.
These shell commands are checked and reported as error:
- "echo -n" (printf should be used)
- "sed -i" (GNUism; use a temp file instead)
- "declare" (bashism, often used with arrays)
- "which" (unreliable exit status and output; use type instead)
- "test a == b" (bashism for "test a = b")
"make test-lint-shell-syntax" can be used to run only the check.
Helped-By: Jeff King <peff@peff.net>
Signed-off-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Jonathan Nieder
Thomas Rast
Torsten Bögershausen