better commit msg on build

.travis.yml

@@ -15,6 +15,7 @@ install:
     - pip install GitPython
       
 script:
+    - export COMMIT_MSG=$(python3 -c 'from git_version import get_deploy_message; print(get_deploy_message())'
     - python3 -c 'from build import build; build("build/LatexPackages/")'
     - cd build
     - zip -r LatexPackages.zip LatexPackages
@@ -46,7 +47,7 @@ deploy:
       commiter_from_gh: true
       allow_empty_commit: true
       target_branch: $TRAVIS_BRANCH
-      commit_message: "%{git_commit_msg}\n\nBuilt commit %{git_sha} from %{repo}:%{git_branch}"
+      commit_message: $COMMIT_MSG
       on:
           all_branches: true
           condition: $TRAVIS_PULL_REQUEST = false

build.py

@@ -2,11 +2,12 @@ from pathlib import *
 import sys
 import git
 from datetime import *
+
 sys.path.insert(0, 'PyTeX/')
 
 from package_formatter import PackageFormatter
 from replacements import make_default_commands
-from git_version import git_describe
+from git_version import git_describe, get_latest_commit
 
 BUILD_DETAILS = [
     "Build details:",
@@ -16,45 +17,39 @@ BUILD_DETAILS = [
 ]
 
 
-def get_latest_commit(repo):
-    if repo.head.is_detached:
-        return repo.head.commit
-    else:
-        return repo.head.ref.commit
-
-
 def build_details():
     repo = git.Repo()
     repo_description = git_describe(get_latest_commit(repo))
     pytex_repo = repo.submodule('PyTeX').module()
     pytex_repo_description = git_describe(get_latest_commit(pytex_repo))
     return list(map(lambda line: line.format(
-            build_time=datetime.now().strftime('%Y/%m/%d %H:%M'),
-            pytex_version=pytex_repo_description,
-            pytex_commit_hash=get_latest_commit(pytex_repo).hexsha[0:7],
-            packages_version=repo_description,
-            packages_commit_hash=get_latest_commit(repo).hexsha[0:7]
-            ), BUILD_DETAILS))
+        build_time=datetime.now().strftime('%Y/%m/%d %H:%M'),
+        pytex_version=pytex_repo_description,
+        pytex_commit_hash=get_latest_commit(pytex_repo).hexsha[0:7],
+        packages_version=repo_description,
+        packages_commit_hash=get_latest_commit(repo).hexsha[0:7]
+    ), BUILD_DETAILS)), repo_description
 
 
 def build(build_dir: str):
     input_root = Path('./packages').resolve()
     output = input_root / build_dir
     print('[PyTeX] Getting git repository information...')
-    extra_header = build_details()
-    print('[PyTeX] ..done.')
+    extra_header, repo_description = build_details()
+    print('[PyTeX] Building version {version} of LatexPackages'.format(version=repo_description))
+    print('[PyTeX] Latest commit message: ' + get_latest_commit(git.Repo()).message.strip())
     if git.Repo().is_dirty():
         extra_header += ['WARNING: Local changes to git repository detected.',
-                '         The build will not be reproducible (!)']
+                         '         The build will not be reproducible (!)']
     num_files = 0
     for file in input_root.rglob('*.pysty'):
-        num_files+=1
+        num_files += 1
         formatter = PackageFormatter(package_name=file.with_suffix('').name, extra_header=extra_header)
         print('[PyTeX] Writing file {}'.format(formatter.file_name))
         make_default_commands(formatter)
         formatter.format_package(file, Path('./').resolve() / build_dir / str(file.parent.relative_to(input_root)))
     print(f'[PyTeX] Successfully built {num_files} packages in {build_dir}/')
 
+
 if __name__ == "__main__":
     build('build')
-

git_version.py

@@ -1,5 +1,25 @@
 import git
 from typing import Dict
+import os
+
+
+def get_latest_commit(repo):
+    if repo.head.is_detached:
+        return repo.head.commit
+    else:
+        return repo.head.ref.commit
+
+
+def get_deploy_message():
+    repo = git.Repo()
+    old_msg = get_latest_commit(repo).message
+    return "{old_msg}\n" \
+           "\n" \
+           "Build branch {branch} ({hexsha}) from {repo_name}" \
+        .format(old_msg=old_msg,
+                branch=os.environ['TRAVIS_BRANCH'],
+                hexsha=get_latest_commit(repo).hexsha[0:7],
+                repo_name='kesslermaximilian/LatexPackages')
 
 
 def get_history(commit: git.objects.commit.Commit, priority=0, depth=0) -> Dict:
@@ -9,9 +29,9 @@ def get_history(commit: git.objects.commit.Commit, priority=0, depth=0) -> Dict:
     }}
     try:
         if len(commit.parents) > 0:
-            commit_history.update(get_history(commit.parents[0], priority, depth+1))
+            commit_history.update(get_history(commit.parents[0], priority, depth + 1))
             for parent in commit.parents[1:]:
-                commit_history.update(get_history(parent, priority+1, depth+1))
+                commit_history.update(get_history(parent, priority + 1, depth + 1))
     except ValueError:
         pass
     return commit_history