1 files changed, 55 insertions, 0 deletions
diff --git a/third_party/git/t/check-non-portable-shell.pl b/third_party/git/t/check-non-portable-shell.pl
new file mode 100755
index 000000000000..38bfeebd881a
--- /dev/null
+++ b/third_party/git/t/check-non-portable-shell.pl
@@ -0,0 +1,55 @@
+#!/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 $line =~ s/\\$//;
+
+	$_ = $line;
+	/\bcp\s+-a/ and err 'cp -a is not portable';
+	/\bsed\s+-[^efn]\s+/ and err 'sed option not portable (use only -n, -e, -f)';
+	/\becho\s+-[neE]/ and err 'echo with option is not portable (use printf)';
+	/^\s*declare\s+/ and err 'arrays/declare not portable';
+	/^\s*[^#]\s*which\s/ and err 'which is not portable (use type)';
+	/\btest\s+[^=]*==/ and err '"test a == b" is not portable (use =)';
+	/\bwc -l.*"\s*=/ and err '`"$(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"';
+	$line = '';
+	# this resets our $. for each file
+	close ARGV if eof;
+}
+exit $exit_code;