[pitivi] Use `pre-commit` as a pre commit hook

[Thibault Saunier <tsaunier src gnome org>]

commit 02229e324510c9a8d862d7b732fe089c77aa1d0f
Author: Thibault Saunier <tsaunier gnome org>
Date:   Thu Apr 7 09:32:53 2016 +0200

    Use `pre-commit` as a pre commit hook

 .pre-commit-config.yaml            |   21 +++++++++++++++++++++
 autogen.sh                         |   15 +++++++++++----
 build/xdg-app/pitivi.template.json |   13 +++++++++++++
 build/xdg-app/pre-commit-configure |   12 ++++++++++++
 4 files changed, 57 insertions(+), 4 deletions(-)
---
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..cab96d1
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,21 @@
+-   repo: https://github.com/pre-commit/pre-commit-hooks.git
+    sha: ff65d01841ad012d0a9aa1dc451fc4539d8b7baf
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-json
+    -   id: autopep8-wrapper
+        files: ^git-phab$
+    -   id: check-docstring-first
+    -   id: debug-statements
+    -   id: flake8
+        files: .*\.py$\|bin/pitivi.in
+-   repo: https://github.com/pre-commit/pre-commit.git
+    sha: 495e21b24dfc73624c8c7a16bf974da54e3217e7
+    hooks:
+    -   id: validate_config
+    -   id: validate_manifest
+-   repo: https://github.com/asottile/reorder_python_imports.git
+    sha: 017e2f64306853ec7f000db52b8280da27eb3b96
+    hooks:
+    -   id: reorder-python-imports
diff --git a/autogen.sh b/autogen.sh
index 8a82162..13a9fa9 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -47,12 +47,19 @@ autoheader_check || DIE=1
 die_check $DIE
 
 # install pre-commit hook for doing clean commits
-if test ! \( -x .git/hooks/pre-commit -a -L .git/hooks/pre-commit \);
-then
-    rm -f .git/hooks/pre-commit
-    ln -s ../../pre-commit.hook .git/hooks/pre-commit
+rm -f .git/hooks/pre-commit
+ln -s ../../pre-commit.hook .git/hooks/pre-commit
+
+which pre-commit
+PRE_COMMIT=$?
+if ((PRE_COMMIT != 0)); then
+  echo "Please install pre-commit from http://pre-commit.com/ and try again"
+  exit 1
+else
+  pre-commit install
 fi
 
+
 # if no arguments specified then this will be printed
 if test -z "$*"; then
   echo "+ checking for autogen.sh options"
diff --git a/build/xdg-app/pitivi.template.json b/build/xdg-app/pitivi.template.json
index db8e5fd..47a4db4 100644
--- a/build/xdg-app/pitivi.template.json
+++ b/build/xdg-app/pitivi.template.json
@@ -103,6 +103,19 @@
             ]
         },
         {
+            "name": "pre-commit",
+            "build-options" : {
+              "build-args": ["--share=network"]
+            },
+            "sources": [
+                {
+                    "type": "file",
+                    "path": "pre-commit-configure",
+                    "dest-filename": "configure"
+                }
+            ]
+        },
+        {
             "name": "matplotlib",
             "build-options" : {
               "build-args": ["--share=network"]
diff --git a/build/xdg-app/pre-commit-configure b/build/xdg-app/pre-commit-configure
new file mode 100755
index 0000000..58c226e
--- /dev/null
+++ b/build/xdg-app/pre-commit-configure
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+FLAGS="$@"
+
+cat <<EOF > Makefile
+all:
+       echo "Nothing"
+
+install:
+       pip3 install -v --install-option="--prefix=/app/" pre-commit
+
+EOF