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authorSam Thursfield <sam.thursfield@codethink.co.uk>2015-01-06 18:13:28 (GMT)
committerAdam Coldrick <adam.coldrick@codethink.co.uk>2015-01-23 10:04:15 (GMT)
commit8bd67f83d00a5fe30605bb060e44dee102b860ae (patch)
tree1a30ce55e98377ae303bfb06065ee3e6ccea2180
parent27863bbea230ef473832656ad4c26fcf878995d1 (diff)
downloadmorph-8bd67f83d00a5fe30605bb060e44dee102b860ae.tar.gz
Read files from a local clone of definitions where possible
Most morphologies involved in a build are in the definitions repo these days. Currently we read each of them using `git cat-file`, which is slow. It's quicker to check out all the files in one go to a temporary directory and then read them from there. With the current workflow users often have definitions.git checked out on disk. It seems strange to not just read the files from there. There are two reasons why I don't want to do that yet: - there are commands which don't run inside a system branch, which would be broken if we expected to always be in a system branch - there may be local changes in the checked-out repo, and it takes around 5 seconds on each build to check if there aren't any local changes. It actually seems faster to just check out a known clean version from the cache.
-rw-r--r--morphlib/sourceresolver.py31
1 files changed, 30 insertions, 1 deletions
diff --git a/morphlib/sourceresolver.py b/morphlib/sourceresolver.py
index 1806859..285d360 100644
--- a/morphlib/sourceresolver.py
+++ b/morphlib/sourceresolver.py
@@ -21,6 +21,8 @@ import cPickle
import logging
import os
import pylru
+import shutil
+import tempfile
import morphlib
@@ -147,6 +149,8 @@ class SourceResolver(object):
self._resolved_morphologies = {}
self._resolved_buildsystems = {}
+ self._definitions_checkout_dir = None
+
def _resolve_ref(self, reponame, ref):
'''Resolves commit and tree sha1s of the ref in a repo and returns it.
@@ -215,8 +219,18 @@ class SourceResolver(object):
if key in self._resolved_morphologies:
return self._resolved_morphologies[key]
+ if reponame == self._definitions_repo and \
+ sha1 == self._definitions_absref:
+ defs_filename = os.path.join(self._definitions_checkout_dir,
+ filename)
+ else:
+ defs_filename = None
+
+
loader = morphlib.morphloader.MorphologyLoader()
- if self.lrc.has_repo(reponame):
+ if defs_filename and os.path.exists(defs_filename):
+ morph = loader.load_from_file(defs_filename)
+ elif self.lrc.has_repo(reponame):
self.status(msg="Looking for %(reponame)s:%(filename)s in local "
"repo cache",
reponame=reponame, filename=filename, chatty=True)
@@ -391,7 +405,19 @@ class SourceResolver(object):
if definitions_original_ref:
definitions_ref = definitions_original_ref
+ self._definitions_checkout_dir = tempfile.mkdtemp()
+
try:
+ # FIXME: not an ideal way of passing this info across
+ self._definitions_repo = definitions_repo
+ self._definitions_absref = definitions_absref
+ try:
+ definitions_cached_repo = self.lrc.get_repo(definitions_repo)
+ except morphlib.localrepocache.NotCached:
+ definitions_cached_repo = self.lrc.cache_repo(definitions_repo)
+ definitions_cached_repo.extract_commit(
+ definitions_absref, self._definitions_checkout_dir)
+
# First, process the system and its stratum morphologies. These
# will all live in the same Git repository, and will point to
# various chunk morphologies.
@@ -411,6 +437,9 @@ class SourceResolver(object):
for repo, ref, filename in chunk_in_source_repo_queue:
self.process_chunk(repo, ref, repo, ref, filename, visit)
finally:
+ shutil.rmtree(self._definitions_checkout_dir)
+ self._definitions_checkout_dir = None
+
logging.debug('Saving contents of resolved tree cache')
self.tree_cache_manager.save_cache(self._resolved_trees)