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a536734625557396949b937a5c3c0bbb66f3399c blob 1926 bytes (raw)

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#!/usr/bin/perl

# Test t0000..t9999.sh for non portable shell scripts
# This script can be called with one or more filenames as parameters

use strict;
use warnings;

my $exit_code=0;
my %func;

sub err {
	my $msg = shift;
	s/^\s+//;
	s/\s+$//;
	s/\s+/ /g;
	print "$ARGV:$.: error: $msg: $_\n";
	$exit_code = 1;
}

# glean names of shell functions
for my $i (@ARGV) {
	open(my $f, '<', $i) or die "$0: $i: $!\n";
	while (<$f>) {
		$func{$1} = 1 if /^\s*(\w+)\s*\(\)\s*{\s*$/;
	}
	close $f;
}

my $line = '';
while (<>) {
	chomp;
	$line .= $_;
	# stitch together incomplete lines (those ending with "\")
	next if $line =~ s/\\$//;

	$_ = $line;
	# Portability issues
	/\bcp\s+-a/ and err 'cp -a is not portable';
	/\bsed\s+-[^efn]\s+/ and err 'sed option not portable (use only -n, -e, -f)';
	/\becho\s+-[neE]/ and err 'echo with option is not portable (use printf)';
	/^\s*declare\s+/ and err 'arrays/declare not portable';
	/^\s*[^#]\s*which\s/ and err 'which is not portable (use type)';
	/\btest\s+[^=]*==/ and err '"test a == b" is not portable (use =)';
	/\bwc -l.*"\s*=/ and err '`"$(wc -l)"` is not portable (use test_line_count)';
	/\bhead\s+-c\b/ and err 'head -c is not portable (use test_copy_bytes BYTES <file >out)';
	/(?:\$\(seq|^\s*seq\b)/ and err 'seq is not portable (use test_seq)';
	/\bgrep\b.*--file\b/ and err 'grep --file FILE is not portable (use grep -f FILE)';
	/\bexport\s+[A-Za-z0-9_]*=/ and err '"export FOO=bar" is not portable (use FOO=bar && export FOO)';
	/^\s*([A-Z0-9_]+=(\w*|(["']).*?\3)\s+)+(\w+)/ and exists($func{$4}) and
		err '"FOO=bar shell_func" assignment extends beyond "shell_func"';
	# Coding style preferences
	/\btest\s+-[a-z]\s+.*?\s+-a\s+/ and err '"test A && test B" preferred to "test A -a B"';
	/\btest\s+-[a-z]\s+.*?\s+-o\s+/ and err '"test A || test B" preferred to "test A -o B"';
	$line = '';
	# this resets our $. for each file
	close ARGV if eof;
}
exit $exit_code;
debug log:

solving a5367346255 ...
found a5367346255 in https://public-inbox.org/git/patch-01.16-8e4b4a2a216-20210412T110456Z-avarab@gmail.com/
found fd3303552be in git.git.git
preparing index
index prepared:
100755 fd3303552bec0d3ca243845634179eb35890866a	t/check-non-portable-shell.pl

applying [1/1] https://public-inbox.org/git/patch-01.16-8e4b4a2a216-20210412T110456Z-avarab@gmail.com/
diff --git a/t/check-non-portable-shell.pl b/t/check-non-portable-shell.pl
index fd3303552be..a5367346255 100755

Checking patch t/check-non-portable-shell.pl...
Applied patch t/check-non-portable-shell.pl cleanly.

index at:
100755 a536734625557396949b937a5c3c0bbb66f3399c	t/check-non-portable-shell.pl

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