Support RSA keys and configure external ChuSQL submodules

scripts/init-deps.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+"""Initialize pinned external submodules, preferring local repositories over SSH."""
+import argparse
+from pathlib import Path
+import subprocess
+
+ROOT = Path(__file__).resolve().parents[1]
+PROJECTS = ['ChuSQL', 'ChuSQL-RustDriver']
+PREFIX = 'ChuGit:/srv/git/'
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument('--database-repo', type=Path, help='local clone/bare repository of ChuSQL')
+    parser.add_argument('--driver-repo', type=Path, help='local clone/bare repository of ChuSQL-RustDriver')
+    args = parser.parse_args()
+    git_args = []
+    local_config = ROOT / 'config/git-local.config'
+    if not args.database_repo and not args.driver_repo and all((Path('/srv/git') / f'{name}.git').is_dir() for name in PROJECTS):
+        current = subprocess.run(['git', 'config', '--local', '--get-all', 'include.path'], cwd=ROOT, text=True, capture_output=True, check=False)
+        if str(local_config) not in current.stdout.splitlines():
+            subprocess.run(['git', 'config', '--local', '--add', 'include.path', str(local_config)], cwd=ROOT, check=True)
+        git_args.extend(['-c', f'include.path={local_config}'])
+    for name, override in zip(PROJECTS, [args.database_repo, args.driver_repo]):
+        source = override or Path('/srv/git') / f'{name}.git'
+        if override and not source.is_dir():
+            parser.error(f'Local repository does not exist: {source}')
+        if source.is_dir():
+            source = source.resolve()
+            subprocess.run(['git', '-C', str(source), 'rev-parse', '--git-dir'], check=True, capture_output=True)
+            key = f'url.{source.as_uri()}.insteadOf'
+            url = f'{PREFIX}{name}.git'
+            subprocess.run(['git', 'config', '--local', '--replace-all', key, url], cwd=ROOT, check=True)
+            git_args.extend(['-c', f'{key}={url}'])
+            print(f'{name}: using local repository {source}', flush=True)
+    # The file protocol is enabled only for this explicit, fixed set of dependencies.
+    if git_args:
+        git_args.extend(['-c', 'protocol.file.allow=always'])
+    subprocess.run(['git', *git_args, 'submodule', 'update', '--init', '--', *[f'external/{name}' for name in PROJECTS]], cwd=ROOT, check=True)
+
+
+if __name__ == '__main__':
+    main()