refactor to put Martins git stuff in utils

core/utils.py

@@ -5,7 +5,7 @@ import re
 import resource
 import random
 import logging
-from subprocess import call
+import subprocess
 
 from urllib.parse import urljoin
 from decimal import Decimal, getcontext
@@ -79,13 +79,61 @@ def GetListDir(sdir):
             res.append((f, ff, os.path.isdir(ff)))
     return res
 
+def write_and_commit(files, message):
+    """Writes the content to the filepath and adds and commits the file to git.  If this fails, a WriteAndCommitError is raised."""
+    git = settings.GIT
+    try:
+        for filepath, content, encoding in files:
+            cwd = filepath.parent
+            filename = filepath.name
+            # GIT see also core/views/uploads.py dwgupload()
+            # GIT see also core/views/expo.py editexpopage()
 
+            if encoding:
+                mode = "w"
+                kwargs = {"encoding": encoding}
+            else:
+                mode = "wb"
+                kwargs = {}
+            try:
+                with open(filepath, mode, **kwargs) as f:
+                    print(f'WRITING{cwd}---{filename} ')
+                    # as the wsgi process www-data, we have group write-access but are not owner, so cannot chmod.
+                    # os.chmod(filepath, 0o664) # set file permissions to rw-rw-r--
+                    f.write(content)
+            except PermissionError:
+                raise WriteAndCommitError(f'CANNOT  save this file.\nPERMISSIONS incorrectly set on server for this file {filename}. Ask a nerd to fix this.')
+
+            cp_add = subprocess.run([git, "add", filename], cwd=cwd, capture_output=True, text=True)
+            if cp_add.returncode != 0:
+                msgdata = 'Ask a nerd to fix this.\n\n' + cp_add.stderr + '\n\n' + cp_add.stdout  + '\n\nreturn code: ' + str(cp_add.returncode)
+                raise WriteAndCommitError(f'CANNOT git on server for this file {filename}. Edits saved but not added to git.\n\n' + msgdata)
+       
+        cp_commit = subprocess.run([git, "commit", "-m", message], cwd=cwd, capture_output=True, text=True)
+        # This produces return code = 1 if it commits OK, but when the repo still needs to be pushed to origin/expoweb
+        if cp_commit.returncode != 0 and cp_commit.stdout != 'nothing to commit, working tree clean':
+            msgdata = 'Ask a nerd to fix this.\n\n' + cp_commit.stderr + '\n\n' + cp_commit.stdout  + '\n\nreturn code: ' + str(cp_commit.returncode)
+            print(msgdata)
+            raise WriteAndCommitError(f'Error code with git on server for this file {filename}. Edits saved, added to git, but NOT committed.\n\n' + msgdata)
+
+    except subprocess.SubprocessError:
+        raise WriteAndCommitError(f'CANNOT git on server for this file {filename}. Subprocess error. Edits not saved.\nAsk a nerd to fix this.')
+
+class WriteAndCommitError(Exception):
+    """Exception class for errors writing files and comitting them to git"""
+    def __init__(self, message):
+        self.message = message
+
+    def __str__(self):
+        return f'WriteAndCommitError: {self.message}'
+        
 def writetrogglefile(filepath, filecontent):
-    '''Set permissions to rw-rw-r-- and commit the new saved file to git
+    '''Commit the new saved file to git
     Callers to cave.writeDataFile() or entrance.writeDataFile() should handle the exception PermissionsError explicitly
     '''
     # GIT see also core/views/expo.py editexpopage()
     # GIT see also core/views/uploads.py dwgupload()
+    # Called from core/models/caves.py Cave.writeDataFile() Entrance.writeDataFile()
     filepath = Path(filepath)
     cwd = filepath.parent
     filename = filepath.name