Use nobody-user for parsing PKGBUILDs

src/decman/app.py

@@ -35,9 +35,11 @@ def main():
         help="print what would happen as a result of running decman",
     )
     parser.add_argument("--debug", action="store_true", default=False, help="show debug output")
-    parser.add_argument("--skip", nargs="*", type=str, help="skip the following execution steps")
     parser.add_argument(
-        "--only", nargs="*", type=str, help="run only the following execution steps"
+        "--skip", nargs="*", type=str, default=[], help="skip the following execution steps"
+    )
+    parser.add_argument(
+        "--only", nargs="*", type=str, default=[], help="run only the following execution steps"
     )
     parser.add_argument(
         "--no-hooks",
@@ -178,6 +180,8 @@ def run_decman(store: _store.Store, args: argparse.Namespace) -> bool:
             If running any command fails.
     """
 
+    output.print_debug(f"Available plugins: {' '.join(decman.plugins.keys())}")
+
     store.ensure("enabled_modules", [])
     store.ensure("module_on_disable_scripts", {})
 

src/decman/plugins/aur/package.py

@@ -2,6 +2,7 @@ import dataclasses
 import os
 import pathlib
 import re
+import shutil
 import tempfile
 
 import requests  # type: ignore
@@ -276,18 +277,38 @@ class CustomPackage:
                 self.git_url, self.pkgbuild_directory, f"No PKGBUILD found in '{path}'."
             )
 
-        return self._run_makepkg_printsrcinfo(path, commands)
+        try:
+            with tempfile.TemporaryDirectory(prefix="decman-pkgbuild-") as tmpdir:
+                tmp_path = pathlib.Path(tmpdir)
+                # Allow the user 'nobody' to read here
+                os.chmod(tmpdir, 0o755)
+                shutil.copy(path / "PKGBUILD", tmp_path / "PKGBUILD")
+                os.chmod(tmp_path / "PKGBUILD", 0o644)
+
+                return self._run_makepkg_printsrcinfo(tmp_path, commands)
+        except OSError as error:
+            raise PKGBUILDParseError(
+                self.git_url,
+                self.pkgbuild_directory,
+                "Failed to create temporary directory for the PKGBUILD.",
+            ) from error
 
     def _srcinfo_from_git(self, commands: AurCommands) -> str:
         assert self.git_url is not None, "This will not get called if git_url is unset."
+        try:
             with tempfile.TemporaryDirectory(prefix="decman-pkgbuild-") as tmpdir:
                 tmp_path = pathlib.Path(tmpdir)
+                # Allow the user 'nobody' to write here
+                os.chmod(tmpdir, 0o777)
                 try:
                     cmd = commands.git_clone(self.git_url, tmpdir)
-                command.check_run_result(cmd, command.run(cmd))
+                    # Use the user nobody, since that will be used later to generate SRCINFO
+                    command.check_run_result(cmd, command.run(cmd, user="nobody"))
                 except errors.CommandFailedError as error:
                     raise PKGBUILDParseError(
-                    self.git_url, self.pkgbuild_directory, "Failed to clone PKGBUILD repository."
+                        self.git_url,
+                        self.pkgbuild_directory,
+                        "Failed to clone PKGBUILD repository.",
                     ) from error
 
                 if not (tmp_path / "PKGBUILD").exists():
@@ -298,13 +319,21 @@ class CustomPackage:
                     )
 
                 return self._run_makepkg_printsrcinfo(tmp_path, commands)
+        except OSError as error:
+            raise PKGBUILDParseError(
+                self.git_url,
+                self.pkgbuild_directory,
+                "Failed to create temporary directory for the PKGBUILD.",
+            ) from error
 
     def _run_makepkg_printsrcinfo(self, path: pathlib.Path, commands: AurCommands) -> str:
         orig_wd = os.getcwd()
         try:
             os.chdir(path)
             cmd = commands.print_srcinfo()
-            _, srcinfo = command.check_run_result(cmd, command.run(cmd))
+            # No need to use the makepkg_user config option here.
+            # For just printing the SRCINFO, hardcoded 'nobody' works
+            _, srcinfo = command.check_run_result(cmd, command.run(cmd, user="nobody"))
         except errors.CommandFailedError as error:
             raise PKGBUILDParseError(
                 self.git_url, self.pkgbuild_directory, "Failed to generate SRCINFO using makepkg."