#!/bin/sh

#

# An example hook script to verify what is about to be committed.

# Called by git-commit with no arguments.  The hook should

# exit with non-zero status after issuing an appropriate message if

# it wants to stop the commit.

#

# To enable this hook, make this file executable.

# This is slightly modified from Andrew Morton's Perfect Patch.

# Lines you introduce should not have trailing whitespace.

# Also check for an indentation that has SP before a TAB.

if git-rev-parse --verify HEAD 2>/dev/null

then

	git-diff-index -p -M --cached HEAD --

else

	# NEEDSWORK: we should produce a diff with an empty tree here

	# if we want to do the same verification for the initial import.

	:

fi |

perl -e '

    my $found_bad = 0;

    my $filename;

    my $reported_filename = "";

    my $lineno;

    sub bad_line {

	my ($why, $line) = @_;

	if (!$found_bad) {

	    print STDERR "*\n";

	    print STDERR "* You have some suspicious patch lines:\n";

	    print STDERR "*\n";

	    $found_bad = 1;

	}

	if ($reported_filename ne $filename) {

	    print STDERR "* In $filename\n";

	    $reported_filename = $filename;

	}

	print STDERR "* $why (line $lineno)\n";

	print STDERR "$filename:$lineno:$line\n";

    }

    while (<>) {

	if (m|^diff --git a/(.*) b/\1$|) {

	    $filename = $1;

	    next;

	}

	if (/^@@ -\S+ \+(\d+)/) {

	    $lineno = $1 - 1;

	    next;

	}

	if (/^ /) {

	    $lineno++;

	    next;

	}

	if (s/^\+//) {

	    $lineno++;

	    chomp;

	    if (/\s$/) {

		bad_line("trailing whitespace", $_);

	    }

	    if (/^\s* \t/) {

		bad_line("indent SP followed by a TAB", $_);

	    }

	    if (/^([<>])\1{6} |^={7}$/) {

		bad_line("unresolved merge conflict", $_);

	    }

	}

    }

    exit($found_bad);

'