From fce565d2d508a9bf9fccd383c0a0038e0107bb4e Mon Sep 17 00:00:00 2001
From: erik <erik.seiert@meissa-gmbh.de>
Date: Tue, 21 Feb 2023 15:08:39 +0100
Subject: [PATCH] Implement git handler

---
 git_handler.py           | 77 ++++++++++++++++++++++++++++++++++++++++
 test/test_git_handler.py | 30 ++++++++++++++++
 2 files changed, 107 insertions(+)
 create mode 100644 git_handler.py
 create mode 100644 test/test_git_handler.py

diff --git a/git_handler.py b/git_handler.py
new file mode 100644
index 0000000..3f30551
--- /dev/null
+++ b/git_handler.py
@@ -0,0 +1,77 @@
+import os
+import subprocess as sub
+
+# define semantics for release types by commit messages
+## snapshot - snapshot release
+## fix/patch - patch release
+## bump - version bump release
+## feature/feat/minor - minor release
+## major/breaking - major release
+
+GIT = 'git'
+LOG = 'log'    
+FORMAT = '"%h %s"'
+FORMAT_DEC = "%d"
+PRETTY_OPTION = '--pretty='
+DECORATE_OPTION = '--decorate=full'
+  
+class GitRepo():
+
+    def __init__(self):
+        self.commits = None
+        self.tags = None
+
+    def __clean_commit_string(self, commit_string):
+        return commit_string.replace('\"', "").replace('\n', "").split()
+
+    def __clean_tag_string(self, tag_string):
+        return tag_string.replace(" ", "").replace('\n', "")
+
+    def get_tags(self):        
+        stream = sub.Popen([GIT,
+                            LOG,
+                            PRETTY_OPTION + FORMAT_DEC,
+                            DECORATE_OPTION],
+                            stdout=sub.PIPE,
+                            stderr=sub.PIPE,
+                            text=True,
+                            encoding="UTF-8")
+        stdout = stream.stdout.readlines()
+        stderr = stream.stderr.readlines()
+
+        if len(stderr) > 0:
+            raise Exception(f"Git command failed with: {stderr}")
+
+        return stdout
+
+    def get_commits(self):
+        stream = sub.Popen([GIT, 
+                            LOG, 
+                            PRETTY_OPTION + FORMAT], 
+                            stdout=sub.PIPE, 
+                            stderr=sub.PIPE,
+                            text=True,
+                            encoding="UTF-8")
+        stdout = stream.stdout.readlines()
+        stderr = stream.stderr.readlines()
+
+        if len(stderr) > 0:
+            raise Exception(f"Git command failed with: {stderr}")
+        
+        self.tags = self.get_tags()
+        self.commits = {}
+
+        if len(self.tags) != len(stdout):
+            raise Exception("Tags list did not match commits list")
+        
+        for i, elem in enumerate(stdout):
+            commit_string = self.__clean_commit_string(elem)
+
+            commit_id = commit_string[0]
+            commit_message = " ".join(commit_string[1:len(commit_string)])
+            commit_tag = self.__clean_tag_string(self.tags[i])
+            
+            self.commits[commit_id] = [commit_tag, commit_message]
+        
+        return self.commits
+   
diff --git a/test/test_git_handler.py b/test/test_git_handler.py
new file mode 100644
index 0000000..77d95c9
--- /dev/null
+++ b/test/test_git_handler.py
@@ -0,0 +1,30 @@
+from pathlib import Path
+import sys
+import os
+
+# getting the name of the directory
+# where the this file is present.
+current = os.path.dirname(os.path.realpath(__file__))
+ 
+# Getting the parent directory name
+# where the current directory is present.
+parent = os.path.dirname(current)
+ 
+# adding the parent directory to
+# the sys.path.
+sys.path.append(parent)
+ 
+# now we can import the module in the parent
+# directory.
+
+from git_handler import *
+
+def test_git_handler():
+
+    # init
+    repo = GitRepo()
+    repo.get_commits()
+
+    #test
+    assert type(repo.commits) == dict
+    assert repo.commits["decd36b"] == ["(tag:refs/tags/TEST)", "Initial commit"]