Mercurial > hg
comparison mercurial/manifest.py @ 31294:c134a33b1d73
treemanifest: make node reuse match flat manifest behavior
In a flat manifest, a node with the same content but different parents is still
considered a new node. In the current tree manifests however, if the content is
the same, we ignore the parents entirely and just reuse the existing node.
In our external treemanifest extension, we want to allow having one treemanifest
for every flat manifests, as a way of easeing the migration to treemanifests. To
make this possible, let's change the root node treemanifest behavior to match
the behavior for flat manifests, so we can have a 1:1 relationship.
While this sounds like a BC breakage, it's not actually a state users can
normally get in because: A) you can't make empty commits, and B) even if you try
to make an empty commit (by making a commit then amending it's changes away),
the higher level commit logic in localrepo.commitctx() forces the commit to use
the original p1 manifest node if no files were changed. So this would only
affect extensions and automation that reached passed the normal
localrepo.commit() logic straight into the manifest logic.
author | Durham Goode <durham@fb.com> |
---|---|
date | Wed, 01 Mar 2017 16:19:41 -0800 |
parents | 959ebff3505a |
children | 2a18e9e6ca43 |
comparison
equal
deleted
inserted
replaced
31293:2cdb1239ff8c | 31294:c134a33b1d73 |
---|---|
1248 return n | 1248 return n |
1249 | 1249 |
1250 def _addtree(self, m, transaction, link, m1, m2, readtree): | 1250 def _addtree(self, m, transaction, link, m1, m2, readtree): |
1251 # If the manifest is unchanged compared to one parent, | 1251 # If the manifest is unchanged compared to one parent, |
1252 # don't write a new revision | 1252 # don't write a new revision |
1253 if m.unmodifiedsince(m1) or m.unmodifiedsince(m2): | 1253 if self._dir != '' and (m.unmodifiedsince(m1) or m.unmodifiedsince(m2)): |
1254 return m.node() | 1254 return m.node() |
1255 def writesubtree(subm, subp1, subp2): | 1255 def writesubtree(subm, subp1, subp2): |
1256 sublog = self.dirlog(subm.dir()) | 1256 sublog = self.dirlog(subm.dir()) |
1257 sublog.add(subm, transaction, link, subp1, subp2, None, None, | 1257 sublog.add(subm, transaction, link, subp1, subp2, None, None, |
1258 readtree=readtree) | 1258 readtree=readtree) |
1259 m.writesubtrees(m1, m2, writesubtree) | 1259 m.writesubtrees(m1, m2, writesubtree) |
1260 text = m.dirtext(self._usemanifestv2) | 1260 text = m.dirtext(self._usemanifestv2) |
1261 # Double-check whether contents are unchanged to one parent | 1261 n = None |
1262 if text == m1.dirtext(self._usemanifestv2): | 1262 if self._dir != '': |
1263 n = m1.node() | 1263 # Double-check whether contents are unchanged to one parent |
1264 elif text == m2.dirtext(self._usemanifestv2): | 1264 if text == m1.dirtext(self._usemanifestv2): |
1265 n = m2.node() | 1265 n = m1.node() |
1266 else: | 1266 elif text == m2.dirtext(self._usemanifestv2): |
1267 n = m2.node() | |
1268 | |
1269 if not n: | |
1267 n = self.addrevision(text, transaction, link, m1.node(), m2.node()) | 1270 n = self.addrevision(text, transaction, link, m1.node(), m2.node()) |
1271 | |
1268 # Save nodeid so parent manifest can calculate its nodeid | 1272 # Save nodeid so parent manifest can calculate its nodeid |
1269 m.setnode(n) | 1273 m.setnode(n) |
1270 return n | 1274 return n |
1271 | 1275 |
1272 class manifestlog(object): | 1276 class manifestlog(object): |