[qa] Add pre-push hook #161

Closes #161

README.rst

@@ -834,6 +834,12 @@ Install test requirements:
 
     pip install -r requirements-test.txt
 
+Install pre-push hook:
+
+.. code-block:: shell
+
+    ./pre_push_hook --install
+
 Create database:
 
 .. code-block:: shell

pre_push_hook.py

@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+
+import argparse
+import os
+import subprocess
+import sys
+
+
+def run_checks():
+    checks = ['run-qa-checks', 'runtests.py']
+    MAIN_DIR = os.getcwd()
+    failed_checks = []
+    for check in checks:
+        task = subprocess.Popen(f'{MAIN_DIR}/{check}')
+        task.communicate()
+        if task.returncode:
+            failed_checks.append(check)
+    if len(failed_checks):
+        print("The following checks failed")
+        print("---------------------------")
+        for check in failed_checks:
+            print(check)
+        sys.exit(1)
+
+
+def make_executable(f):
+    task = subprocess.Popen(
+        ['chmod', '+x', f], stdout=subprocess.PIPE, stderr=subprocess.PIPE
+    )
+    res, err = task.communicate()
+    return res, err
+
+
+def install_hook():
+    MAIN_DIR = os.getcwd()
+    HOOKS_DIR = os.path.join(MAIN_DIR, '.git', 'hooks')
+    hook_file = os.path.join(HOOKS_DIR, 'pre-push')
+    symlink = os.path.islink(hook_file)
+    if symlink and os.path.exists(hook_file):
+        print('Symlink already exists')
+    else:
+        if symlink:
+            os.unlink(hook_file)
+        os.symlink(os.path.abspath(__file__), hook_file)
+        print('Symlink created')
+
+    # Makes the hook file executable
+    res, err = make_executable(hook_file)
+    if err:
+        raise ValueError(err)
+
+
+def main(args=None):
+    parser = argparse.ArgumentParser()
+    parser.add_argument('remote', nargs='?', help='provided by git before push')
+    parser.add_argument('url', nargs='?', help='provided by git before push')
+    parser.add_argument(
+        '--install', action='store_true', default=False,
+    )
+    args = parser.parse_args(args=args)
+    if args.install:
+        return install_hook()
+    run_checks()
+
+
+if __name__ == '__main__':
+    main()