klippy: report repo branch, remote, and tracking url

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

klippy/klippy.py

@@ -343,7 +343,7 @@ def main():
     else:
         logging.getLogger().setLevel(debuglevel)
     logging.info("Starting Klippy...")
-    git_vers, git_status = util.get_git_version()
+    git_vers, git_status, repo_info = util.get_git_version()
     extra_files = [fname for code, fname in git_status
                    if (code in ('??', '!!') and fname.endswith('.py')
                        and (fname.startswith('klippy/kinematics/')
@@ -360,6 +360,10 @@ def main():
         if len(modified_files) > 10:
             modified_files[10:] = ["(+%d files)" % (len(modified_files) - 10,)]
         extra_git_desc += "\nModified files: %s" % (', '.join(modified_files),)
+    if repo_info:
+        extra_git_desc += "\nBranch: %s" % (repo_info["branch"])
+        extra_git_desc += "\nRemote: %s" % (repo_info["remote"])
+        extra_git_desc += "\nTracked URL: %s" % (repo_info["url"])
     start_args['software_version'] = git_vers
     start_args['cpu_info'] = util.get_cpu_info()
     if bglogger is not None:

klippy/util.py

@@ -133,6 +133,55 @@ def get_version_from_file(klippy_src):
         pass
     return "?"
 
+def _get_repo_info(gitdir):
+    repo_info = {"branch": "?", "remote": "?", "url": "?"}
+    prog_branch = ('git', '-C', gitdir, 'branch', '--no-color')
+    try:
+        process = subprocess.Popen(prog_branch, stdout=subprocess.PIPE,
+                                   stderr=subprocess.PIPE)
+        branch_list, err = process.communicate()
+        retcode = process.wait()
+        if retcode != 0:
+            logging.debug("Error running git branch: %s", err)
+            return repo_info
+        lines = str(branch_list.strip().decode()).split("\n")
+        for line in lines:
+            if line[0] == "*":
+                repo_info["branch"] = line[1:].strip()
+                break
+        else:
+            logging.debug("Unable to find current branch:\n%s", branch_list)
+            return repo_info
+        if repo_info["branch"].startswith("(HEAD detached"):
+            parts = repo_info["branch"].strip("()").split()[-1].split("/", 1)
+            if len(parts) != 2:
+                return repo_info
+            repo_info["remote"] = parts[0]
+        else:
+            key = "branch.%s.remote" % (repo_info["branch"],)
+            prog_config = ('git', '-C', gitdir, 'config', '--get', key)
+            process = subprocess.Popen(prog_config, stdout=subprocess.PIPE,
+                                       stderr=subprocess.PIPE)
+            remote_info, err = process.communicate()
+            retcode = process.wait()
+            if retcode != 0:
+                logging.debug("Error running git config: %s", err)
+                return repo_info
+            repo_info["remote"] = str(remote_info.strip().decode())
+        prog_remote_url = (
+            'git', '-C', gitdir, 'remote', 'get-url', repo_info["remote"])
+        process = subprocess.Popen(prog_remote_url, stdout=subprocess.PIPE,
+                                   stderr=subprocess.PIPE)
+        remote_url, err = process.communicate()
+        retcode = process.wait()
+        if retcode != 0:
+            logging.debug("Error running git remote get-url: %s", err)
+            return repo_info
+        repo_info["url"] = str(remote_url.strip().decode())
+    except:
+        logging.debug("Error fetching repo info: %s", traceback.format_exc())
+    return repo_info
+
 def get_git_version(from_file=True):
     klippy_src = os.path.dirname(__file__)
 
@@ -154,7 +203,8 @@ def get_git_version(from_file=True):
                       for l in str(stat.strip().decode()).split('\n')]
             retcode = process.wait()
             if retcode == 0:
-                return (str(ver.strip().decode()), status)
+                repo_info = _get_repo_info(gitdir)
+                return (str(ver.strip().decode()), status, repo_info)
             else:
                 logging.debug("Error getting git status: %s", err)
         else:
@@ -163,5 +213,5 @@ def get_git_version(from_file=True):
         logging.debug("Exception on run: %s", traceback.format_exc())
 
     if from_file:
-        return (get_version_from_file(klippy_src), [])
+        return (get_version_from_file(klippy_src), [], {})
-    return ("?", [])
+    return ("?", [], {})