Add autospec information to spec header

Add information about what autospec version was used to create the
spec file.

New header will appear as:

+# autospec version: v2
+# autospec commit: 1234567

With this change we'll restart tagging autospec. Changes that get
tagged (after PR merge, tag likely just pushed via git cli) should be
doing something that would benefit from a larger package ecosystem
rebuild.

Signed-off-by: William Douglas <[email protected]>

autospec/git.py

@@ -22,8 +22,31 @@
 import glob
 import os
 import subprocess
+import sys
+import tempfile
 
-from util import call, write_out
+from util import call, open_auto, write_out
+
+
+def get_autospec_info():
+    """Get the latest tag from autospec."""
+    path = os.path.dirname(sys.path[0])
+    git_out = tempfile.mkstemp()[1]
+    try:
+        call("git tag -l --sort=-v:refname", git_out, cwd=path)
+        with open_auto(git_out) as gfile:
+            tag = gfile.readlines()[0].strip()
+    except Exception:
+        tag = ""
+    os.unlink(git_out)
+    try:
+        call('git log -1 --pretty=format:"%h"', git_out, cwd=path)
+        with open_auto(git_out) as gfile:
+            commit = gfile.readlines()[0].strip()
+    except Exception:
+        commit = ""
+    os.unlink(git_out)
+    return tag, commit
 
 
 def commit_to_git(config, name, success):

autospec/specfiles.py

@@ -25,6 +25,7 @@
 import types
 from collections import OrderedDict
 
+import git
 from util import _file_write, open_auto
 
 
@@ -104,6 +105,9 @@ def write_comment_header(self):
         self._write("# This file is auto-generated. DO NOT EDIT\n")
         self._write("# Generated by: autospec.py\n")
         self._write(f"# Using build pattern: {self.config.default_pattern}\n")
+        tag, commit = git.get_autospec_info()
+        self._write(f"# autospec version: {tag}\n")
+        self._write(f"# autospec commit: {commit}\n")
         self._write("#\n")
 
         # if package was verified, write public key information

tests/test_specfile.py

@@ -43,6 +43,8 @@ def test_write_comment_header(self):
                   "#\n",
                   "# Source0 file verified with key 0x1 (email)",
                   "#"]
+        # skipping autospec version lines as they change
+        self.WRITES = self.WRITES[:4] + self.WRITES[6:]
         self.assertEqual(expect, self.WRITES)
 
     def test_write_nvr_no_urlban(self):