From 298b62e07bb2092fafff5c73c8c5d87611697ced Mon Sep 17 00:00:00 2001
From: Jakub Horak <thement@ucw.cz>
Date: Fri, 29 Aug 2008 19:28:14 +0200
Subject: [PATCH] Added pre-commit patch checker.

---
 build/git/pre-commit | 100 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 build/git/pre-commit

diff --git a/build/git/pre-commit b/build/git/pre-commit
new file mode 100644
index 00000000..5b112663
--- /dev/null
+++ b/build/git/pre-commit
@@ -0,0 +1,100 @@
+#!/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 $lineno;
+    my @sh_checks;
+    sub bad_line {
+	my ($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 "* $why ($filename:$lineno)\n";
+	print STDERR "$lineno:$line\n" if ($line);
+    }
+    sub sh_check {
+        open(IN, "$filename") || die ("Cannot open $filename");
+	my $has_loc = 0;
+	my $has_glob = 0;
+	my $has_copy = 0;
+	my $empty = 0;
+
+	$lineno = 0;
+	while(<IN>) {
+	    if (/^\s*\#include\s+"/) {
+		    bad_line("sherlock includes after global includes", $_) if (!$has_loc && $has_glob);
+		    $has_loc++;
+	    }
+	    $has_glob++ if (/^\s*\#include\s+\</);
+	    $has_copy++ if (/\(c\)\s*\w/);
+	    $empty = $_ =~ /^\s*$/;
+	    $lineno++;
+	}
+	bad_line("empty lines at end of input") if ($empty);
+	bad_line("missing copyright") if (!$has_copy);
+	close(IN);
+    }
+    while (<>) {
+	if (m|^diff --git a/(.*) b/\1$|) {
+	    $filename = $1;
+	    push (@sh_checks, $filename) if ($filename =~ /\.[ch]$/);
+	    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 (/^\s*\#define\s+LOCAL_DEBUG/) {
+	    #    bad_line("LOCAL_DEBUG in commit", $_);
+	    #}
+	    if (/^([<>])\1{6} |^={7}$/) {
+		bad_line("unresolved merge conflict", $_);
+	    }
+	}
+    }
+    foreach $filename (@sh_checks) {
+    	sh_check();
+    }
+    exit($found_bad);
+'
-- 
2.39.2