pre-commit: Avoid launching python subprocesses.

This makes Python required only for (portable) fnmatch().

Change the ignore script to work as a filter.

Multi-platform improvements.

Change-Id: I6ac757d48ba2ff965da5da3dc9c25047a0e37f92
Reviewed-on: https://code.wireshark.org/review/13693
Reviewed-by: Michael Mann <mmann78@netscape.net>
Reviewed-by: João Valverde <j@v6e.pt>

1 files changed, 72 insertions, 0 deletions

diff --git a/tools/pre-commit-ignore.py b/tools/pre-commit-ignore.py
new file mode 100755
index 0000000000..d043368a95
--- /dev/null
+++ b/tools/pre-commit-ignore.py
@@ -0,0 +1,72 @@
+#!/bin/env python
+#
+# Wireshark - Network traffic analyzer
+# By Gerald Combs <gerald@wireshark.org>
+# Copyright 1998 Gerald Combs
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import sys
+import os
+import fnmatch
+
+IGNORE_CONF = "pre-commit-ignore.conf"
+
+if len(sys.argv) > 2:
+    print("Usage: {0} [path/to/ignore.conf]".format(sys.argv[0]))
+    sys.exit(1)
+
+if len(sys.argv) == 2:
+    ignore_path = sys.argv[1]
+else:
+    ignore_path = IGNORE_CONF
+
+# Function to load our patterns from 'path' for modified files
+# to be ignored (skipping any comments)
+def load_checkignore(path):
+    try:
+        with open(path) as f:
+            patterns = f.read()
+    except OSError as err:
+        print(str(err))
+        return []
+    ign = [l.strip() for l in patterns.splitlines()]
+    ign = [l for l in ign if l and not l.startswith("#")]
+    return ign
+
+ignore_list = load_checkignore(ignore_path)
+
+def ignore_match(f):
+    for p in ignore_list:
+        if fnmatch.fnmatchcase(f, p):
+            return True
+    return False
+
+for line in sys.stdin:
+    line = line.strip()
+    if not ignore_match(line):
+        print(line)
+
+#
+#  Editor modelines
+#
+#  Local Variables:
+#  c-basic-offset: 4
+#  indent-tabs-mode: nil
+#  End:
+#
+#  ex: set shiftwidth=4 expandtab:
+#  :indentSize=4:noTabs=true:
+#