scripts/convert-srcuri: Backport SRC_URI conversion script from master branch

This script handles two emerging issues:

1. There is uncertainty about the default branch name in git going forward.
To try and cover the different possible outcomes, add branch names to all
git:// and gitsm:// SRC_URI entries.

2. Github are dropping support for git:// protocol fetching, so remap github
 urls as needed. For more details see:

https://github.blog/2021-09-01-improving-git-protocol-security-github/

(From OE-Core rev: 904bdbab712e2f3c332c4d85d08ed83c957e249f)

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/contrib/convert-srcuri.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+#
+# Conversion script to update SRC_URI to add branch to git urls
+#
+# Copyright (C) 2021 Richard Purdie
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import re
+import os
+import sys
+import tempfile
+import shutil
+import mimetypes
+
+if len(sys.argv) < 2:
+    print("Please specify a directory to run the conversion script against.")
+    sys.exit(1)
+
+def processfile(fn):
+    def matchline(line):
+        if "MIRROR" in line or ".*" in line or "GNOME_GIT" in line:
+            return False
+        return True
+    print("processing file '%s'" % fn)
+    try:
+        if "distro_alias.inc" in fn or "linux-yocto-custom.bb" in fn:
+            return
+        fh, abs_path = tempfile.mkstemp()
+        modified = False
+        with os.fdopen(fh, 'w') as new_file:
+            with open(fn, "r") as old_file:
+                for line in old_file:
+                    if ("git://" in line or "gitsm://" in line) and "branch=" not in line and matchline(line):
+                        if line.endswith('"\n'):
+                            line = line.replace('"\n', ';branch=master"\n')
+                        elif line.endswith(" \\\n"):
+                            line = line.replace(' \\\n', ';branch=master \\\n')
+                        modified = True
+                    if ("git://" in line or "gitsm://" in line) and "github.com" in line and "protocol=https" not in line and matchline(line):
+                        if "protocol=git" in line:
+                            line = line.replace('protocol=git', 'protocol=https')
+                        elif line.endswith('"\n'):
+                            line = line.replace('"\n', ';protocol=https"\n')
+                        elif line.endswith(" \\\n"):
+                            line = line.replace(' \\\n', ';protocol=https \\\n')
+                        modified = True
+                    new_file.write(line)
+        if modified:
+            shutil.copymode(fn, abs_path)
+            os.remove(fn)
+            shutil.move(abs_path, fn)
+    except UnicodeDecodeError:
+        pass
+
+ourname = os.path.basename(sys.argv[0])
+ourversion = "0.1"
+
+if os.path.isfile(sys.argv[1]):
+    processfile(sys.argv[1])
+    sys.exit(0)
+
+for targetdir in sys.argv[1:]:
+    print("processing directory '%s'" % targetdir)
+    for root, dirs, files in os.walk(targetdir):
+        for name in files:
+            if name == ourname:
+                continue
+            fn = os.path.join(root, name)
+            if os.path.islink(fn):
+                continue
+            if "/.git/" in fn or fn.endswith(".html") or fn.endswith(".patch") or fn.endswith(".m4") or fn.endswith(".diff"):
+                continue
+            processfile(fn)
+
+print("All files processed with version %s" % ourversion)