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a0a630192d
One-shot environment variable assignments, such as 'FOO' in
"FOO=bar cmd", exist only during the invocation of 'cmd'. However, if
'cmd' happens to be a shell function, then 'FOO' is assigned in the
executing shell itself, and that assignment remains until the process
exits (unless explicitly unset). Since this side-effect of
"FOO=bar shell_func" is unlikely to be intentional, detect and report
such usage.
To distinguish shell functions from other commands, perform a pre-scan
of shell scripts named as input, gleaning a list of function names by
recognizing lines of the form (loosely matching whitespace):
shell_func () {
and later report suspect lines of the form (loosely matching quoted
values):
FOO=bar [BAR=foo ...] shell_func
Also take care to stitch together incomplete lines (those ending with
"\") since suspect invocations may be split over multiple lines:
FOO=bar BAR=foo \
shell_func
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
51 lines
1.3 KiB
Perl
Executable File
51 lines
1.3 KiB
Perl
Executable File
#!/usr/bin/perl
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# Test t0000..t9999.sh for non portable shell scripts
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# This script can be called with one or more filenames as parameters
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use strict;
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use warnings;
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my $exit_code=0;
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my %func;
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sub err {
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my $msg = shift;
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s/^\s+//;
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s/\s+$//;
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s/\s+/ /g;
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print "$ARGV:$.: error: $msg: $_\n";
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$exit_code = 1;
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}
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# glean names of shell functions
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for my $i (@ARGV) {
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open(my $f, '<', $i) or die "$0: $i: $!\n";
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while (<$f>) {
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$func{$1} = 1 if /^\s*(\w+)\s*\(\)\s*{\s*$/;
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}
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close $f;
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}
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while (<>) {
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chomp;
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# stitch together incomplete lines (those ending with "\")
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while (s/\\$//) {
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$_ .= readline;
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chomp;
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}
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/\bsed\s+-i/ and err 'sed -i is not portable';
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/\becho\s+-[neE]/ and err 'echo with option is not portable (use printf)';
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/^\s*declare\s+/ and err 'arrays/declare not portable';
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/^\s*[^#]\s*which\s/ and err 'which is not portable (use type)';
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/\btest\s+[^=]*==/ and err '"test a == b" is not portable (use =)';
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/\bwc -l.*"\s*=/ and err '`"$(wc -l)"` is not portable (use test_line_count)';
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/\bexport\s+[A-Za-z0-9_]*=/ and err '"export FOO=bar" is not portable (use FOO=bar && export FOO)';
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/^\s*([A-Z0-9_]+=(\w+|(["']).*?\3)\s+)+(\w+)/ and exists($func{$4}) and
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err '"FOO=bar shell_func" assignment extends beyond "shell_func"';
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# this resets our $. for each file
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close ARGV if eof;
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}
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exit $exit_code;
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