[gtk-doc] pre-commit: add pyflakes as a check

[Stefan Sauer <stefkost src gnome org>]

commit 788a3a8f588df7315229da320dc68ea7926f42c4
Author: Stefan Sauer <ensonic users sf net>
Date:   Thu Apr 13 08:33:00 2017 +0200

    pre-commit: add pyflakes as a check

 tools/git-pre-commit |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/tools/git-pre-commit b/tools/git-pre-commit
index 2b1e189..349735b 100755
--- a/tools/git-pre-commit
+++ b/tools/git-pre-commit
@@ -3,6 +3,9 @@
 # cp tools/git-pre-commit .git/hooks/pre-commit
 
 which >/dev/null pep8 || (echo "please install pep8"; exit )
+which >/dev/null autopep8 || (echo "please install autopep8"; exit )
+which >/dev/null pyflakes || (echo "please install pyflakes"; exit )
+
 files=$(git diff --name-only --staged --diff-filter=ACMRTUXB | egrep "*.py$")
 
 if test -n "$files"; then
@@ -13,6 +16,9 @@ if test -n "$files"; then
     autopep8 --max-line-length=120 --diff $files
     echo
     echo "To fix run: autopep8 --max-line-length=120 -i $files"
+  else
+    pyflakes $files
+    res=$?
   fi
   exit $res
 fi