Implemented checksum test in the travis script (#298)

* Implemented checksum test in the travis script
* Added workaround for squashed forced pushes
* Made test possible to run locally
* Match multiple git versions for the working directory message

.travis.yml

@@ -1,5 +1,6 @@
 language: "python"
 python: "3.6"
+sudo: required
 addons:
   apt:
     sources:
@@ -7,5 +8,8 @@ addons:
     packages:
     - shellcheck
 install: "pip install flake8"
-script: "test/static_code_analysis.sh"
+script: 
+  - test/static_code_analysis.sh
+  - yes "" | ./pmbootstrap.py init
+  - test/check_checksums.py
 

test/check_checksums.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+import os
+import subprocess
+
+
+def get_changed_files():
+    try:
+        raw = subprocess.check_output(['git', 'diff', '--name-only', os.environ['TRAVIS_COMMIT_RANGE']])
+    except (KeyError, subprocess.CalledProcessError) as e:
+        raw = subprocess.check_output(['git', 'diff', '--name-only', 'HEAD~1'])
+    return raw.decode().splitlines()
+
+
+def get_changed_packages():
+    files = get_changed_files()
+    packages = set()
+    for file in files:
+        if not file.startswith("aports/"):
+            continue
+        name = file.split("/")[2]
+        packages.add(name)
+    return packages
+
+
+def check_output_always(command):
+    try:
+        return subprocess.check_output(command)
+    except subprocess.CalledProcessError as e:
+        return e.output
+
+
+def check_checksums(package):
+    command = ['./pmbootstrap.py', 'checksum', package]
+    try:
+        subprocess.check_output(command)
+    except subprocess.CalledProcessError as e:
+        print("Something gone wrong in pmbootstrap. Log:")
+        logfile = os.path.expanduser("~/.local/var/pmbootstrap/log.txt")
+        with open(logfile) as log:
+            print(log.read())
+
+    result = check_output_always(['git', 'status', '--porcelain', '--untracked-files=no']).decode()
+
+    if result == "":
+        print("** The checksums are correct")
+    else:
+        print(result)
+        print("** The checksums are not correct")
+        exit(1)
+
+
+if __name__ == "__main__":
+    packages = get_changed_packages()
+
+    if len(packages) == 0:
+        print("No aports packages changed in this commit")
+        exit(0)
+
+    for package in packages:
+        print("Checking {} for correct checksums".format(package))
+        check_checksums(package)