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ganarchy
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Improve commit handling 

Previously we relied solely on the cache for commit
counts and other things. This improves that and fixes
issues with commit metadata extraction.
This commit is contained in:
SoniEx2 2019-06-15 11:03:31 -03:00
parent 4bd53221bb
commit fc74a89a3c
1 changed files with 50 additions and 21 deletions
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71
ganarchy.py
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@ -342,8 +342,28 @@ class GitError(LookupError):
"""Raised when a git operation fails, generally due to a missing commit or branch, or network connection issues."""
pass
class Git:
def __init__(self, path):
self.path = path
self.base = ("git", "-C", path)
def get_hash(self, target):
try:
return subprocess.check_output(self.base + ("show", target, "-s", "--format=format:%H", "--"), stderr=subprocess.DEVNULL).decode("utf-8")
except subprocess.CalledProcessError as e:
raise GitError from e
def get_commit_message(self, target):
try:
return subprocess.check_output(self.base + ("show", target, "-s", "--format=format:%B", "--"), stderr=subprocess.DEVNULL).decode("utf-8", "replace")
except subprocess.CalledProcessError as e:
raise GitError from e
# Currently we only use one git repo, at cache_home
GIT = Git(cache_home)
class Repo:
def __init__(self, dbconn, project, url, branch, list_metadata=False):
def __init__(self, dbconn, project, url, branch, head_commit, list_metadata=False):
self.url = url
self.branch = branch
self.project_commit = project.commit
@ -355,25 +375,28 @@ class Repo:
self.branchname = "gan" + hmac.new(branch.encode("utf-8"), url.encode("utf-8"), "sha256").hexdigest()
self.head = "refs/heads/" + branch
try:
self.hash = subprocess.check_output(["git", "-C", cache_home, "show", self.branchname, "-s", "--format=%H", "--"], stderr=subprocess.DEVNULL).decode("utf-8").strip()
except subprocess.CalledProcessError:
self.hash = None
if head_commit:
self.hash = head_commit
else:
try:
self.hash = GIT.get_hash(self.branchname)
except GitError:
self.hash = None
self.message = None
if list_metadata:
try:
self.fetch_metadata()
self.update_metadata()
except GitError:
pass
def fetch_metadata(self):
try:
self.message = subprocess.check_output(["git", "-C", cache_home, "show", self.branchname, "-s", "--format=%B", "--"], stderr=subprocess.DEVNULL).decode("utf-8", "replace")
except subprocess.CalledProcessError as e:
raise GitError from e
def update_metadata(self):
self.message = GIT.get_commit_message(self.branchname)
def update(self): # FIXME?
def update(self):
"""
Updates the git repo, returning new metadata.
"""
try:
subprocess.check_output(["git", "-C", cache_home, "fetch", "-q", self.url, "+" + self.head + ":" + self.branchname], stderr=subprocess.STDOUT)
except subprocess.CalledProcessError as e:
@ -381,7 +404,13 @@ class Repo:
click.echo(e.output, err=True)
return None
pre_hash = self.hash
post_hash = subprocess.check_output(["git", "-C", cache_home, "show", self.branchname, "-s", "--format=%H", "--"], stderr=subprocess.DEVNULL).decode("utf-8").strip()
try:
post_hash = GIT.get_hash(self.branchname)
except GitError as e:
# This should never happen, but maybe there's some edge cases?
# Can you force-push an empty branch?
# TODO
return None
self.hash = post_hash
if not pre_hash:
pre_hash = post_hash
@ -391,7 +420,7 @@ class Repo:
count = 0 # force-pushed
try:
subprocess.check_call(["git", "-C", cache_home, "merge-base", "--is-ancestor", self.project_commit, self.branchname], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
self.fetch_metadata()
self.update_metadata()
return count, post_hash, self.message
except (subprocess.CalledProcessError, GitError) as e:
click.echo(e, err=True)
@ -406,29 +435,29 @@ class Project:
if list_repos:
repos = []
with dbconn:
for (e, url, branch) in dbconn.execute('''SELECT "max"("e"), "url", "branch" FROM (SELECT "max"("T1"."entry") "e", "T1"."url", "T1"."branch" FROM "repo_history" "T1"
for (e, url, branch, head_commit) in dbconn.execute('''SELECT "max"("e"), "url", "branch", "head_commit" FROM (SELECT "max"("T1"."entry") "e", "T1"."url", "T1"."branch", "T1"."head_commit" FROM "repo_history" "T1"
WHERE (SELECT "active" FROM "repos" "T2" WHERE "url" = "T1"."url" AND "branch" IS "T1"."branch" AND "project" IS ?1)
GROUP BY "T1"."url", "T1"."branch"
UNION
SELECT null, "T3"."url", "T3"."branch" FROM "repos" "T3" WHERE "active" AND "project" IS ?1)
SELECT null, "T3"."url", "T3"."branch", null FROM "repos" "T3" WHERE "active" AND "project" IS ?1)
GROUP BY "url" ORDER BY "e"''', (project_commit,)):
repos.append(Repo(dbconn, self, url, branch))
repos.append(Repo(dbconn, self, url, branch, head_commit))
self.repos = repos
else:
self.repos = None
def refresh_metadata(self):
try:
project = subprocess.check_output(["git", "-C", cache_home, "show", self.commit, "-s", "--format=%B", "--"], stderr=subprocess.DEVNULL).decode("utf-8", "replace")
project = GIT.get_commit_message(self.commit)
project_title, project_desc = (lambda x: x.groups() if x is not None else ('', None))(re.fullmatch('^\\[Project\\]\s+(.+?)(?:\n\n(.+))?$', project, flags=re.ASCII|re.DOTALL|re.IGNORECASE))
if not project_title.strip():
if not project_title.strip(): # FIXME
project_title, project_desc = ("Error parsing project commit",)*2
if project_desc:
if project_desc: # FIXME
project_desc = project_desc.strip()
self.commit_body = project
self.title = project_title
self.description = project_desc
except subprocess.CalledProcessError:
except GitError:
self.commit_body = None
self.title = None
self.description = None