Git patch extraction function

git.py

@@ -0,0 +1,65 @@
+__filename__ = "git.py"
+__author__ = "Bob Mottram"
+__license__ = "AGPL3+"
+__version__ = "1.1.0"
+__maintainer__ = "Bob Mottram"
+__email__ = "bob@freedombone.net"
+__status__ = "Production"
+
+import os
+
+
+def extractPatch(baseDir: str, nickname: str, domain: str,
+                 subject: str, content: str) -> bool:
+    """Is the given post content a git patch?
+    """
+    # must have a subject line
+    if not subject:        
+        return False
+    if '[PATCH]' not in content:
+        return False
+    if '---' not in content:
+        return False
+    if 'diff ' not in content:
+        return False
+    if 'From:' not in content:
+        return False
+    if 'Date:' not in content:
+        return False
+    if 'Subject:' not in content:
+        return False
+    if '\n' not in content:
+        return False
+    gitProjectsFilename = \
+        baseDir + '/accounts/' + nickname + '@' + domain + '/gitprojects.txt'
+    if not os.path.isfile(gitProjectsFilename):
+        return False
+    projectName = None
+    for word in subject.lower().split(' '):
+        if word + '\n' in open(gitProjectsFilename).read():
+            projectName = word
+            break
+    if not projectName:
+        return False
+    patchLines = content.split('\n')
+    patchFilename = None
+    patchDir = None
+    # get the subject line and turn it into a filename
+    for line in patchLines:
+        if line.startswith('Subject:'):
+            patchSubject = \
+                line.replace('Subject:','').replace('/','|').strip()
+            patchDir = \
+                baseDir + '/accounts/' + nickname + '@' + domain + \
+                '/patches/' + projectName
+            patchFilename = \
+                patchDir + '/' + patchSubject + '.patch'
+            break
+    if not patchFilename:
+        return False
+    patchFile = open(patchFilename, "w")
+    if not patchFile:
+        return False
+    patchFile.write(content)
+    patchFile.close()
+    return True