Show full PKGBUILD if a commit id is not found

If a git commit id is not found in a PKGBUILD repository, show the full
PKGBUILD instead of trying to show a git diff.

Fixes #5

example/source.py

@@ -230,6 +230,9 @@ class MyCommands(decman.config.Commands):
     def git_get_commit_id(self) -> list[str]:
         return ["git", "rev-parse", "HEAD"]
 
+    def git_log_commit_ids(self) -> list[str]:
+        return ["git", "log", "--format=format:%H"]
+
     def review_file(self, file: str) -> list[str]:
         return ["less", file]
 

src/decman/config.py

@@ -136,6 +136,12 @@ class Commands:
         """
         return ["git", "rev-parse", "HEAD"]
 
+    def git_log_commit_ids(self) -> list[str]:
+        """
+        Running this command outputs commit hashes of the repository.
+        """
+        return ["git", "log", "--format=format:%H"]
+
     def review_file(self, file: str) -> list[str]:
         """
         Running this command outputs a file for the user to see.

src/decman/lib/fpm.py

@@ -1078,7 +1078,14 @@ before and thus are found in the cache."
                                 default=True):
                 latest_reviewed_commit = self._store.pkgbuild_latest_reviewed_commits.get(
                     pkgbase)
-                if latest_reviewed_commit is None:
+
+                git_commit_ids = subprocess.run(
+                    conf.commands.git_log_commit_ids(),
+                    check=True,
+                    stdout=subprocess.PIPE,
+                ).stdout.decode().strip().split('\n')
+
+                if latest_reviewed_commit is None or latest_reviewed_commit not in git_commit_ids:
                     for file in os.scandir("."):
                         if file.is_file() and not file.name.startswith("."):
                             subprocess.run(conf.commands.review_file(