[PATCH 1 of 2] copies: add matcher parameter to copy logic
Martin von Zweigbergk
martinvonz at google.com
Thu Apr 16 16:13:18 CDT 2015
On Thu, Apr 16, 2015 at 12:05 PM Durham Goode <durham at fb.com> wrote:
> # HG changeset patch
> # User Durham Goode <durham at fb.com>
> # Date 1429208970 25200
> # Thu Apr 16 11:29:30 2015 -0700
> # Node ID 0270a44b46aabbaf794dbd62b08b622313fe1b85
> # Parent c560d8c687916cb70a6d54c2c9ddcb5c9e457be2
> copies: add matcher parameter to copy logic
>
> This allows passing a matcher down the pathcopies() stack to
> _forwardcopies().
> This will let us add logic in a later patch to avoid tracing copies when
> not
> necessary (like when doing hg diff -r 1 -r 2 foo.txt).
>
> diff --git a/hgext/largefiles/overrides.py b/hgext/largefiles/overrides.py
> --- a/hgext/largefiles/overrides.py
> +++ b/hgext/largefiles/overrides.py
> @@ -547,8 +547,8 @@ def overridefilemerge(origfn, repo, myno
> repo.wwrite(fcd.path(), fco.data(), fco.flags())
> return 0
>
> -def copiespathcopies(orig, ctx1, ctx2):
> - copies = orig(ctx1, ctx2)
> +def copiespathcopies(orig, ctx1, ctx2, match=None):
> + copies = orig(ctx1, ctx2, match=match)
> updated = {}
>
> for k, v in copies.iteritems():
> diff --git a/mercurial/copies.py b/mercurial/copies.py
> --- a/mercurial/copies.py
> +++ b/mercurial/copies.py
> @@ -140,14 +140,16 @@ def _dirstatecopies(d):
> del c[k]
> return c
>
> -def _computeforwardmissing(a, b):
> +def _computeforwardmissing(a, b, match=None):
> """Computes which files are in b but not a.
> This is its own function so extensions can easily wrap this call to
> see what
> files _forwardcopies is about to process.
> """
> - return b.manifest().filesnotin(a.manifest())
> + for f in b.manifest().filesnotin(a.manifest()):
> + if not match or match(f):
> + yield f
>
I'd rather have this written as:
ma = a.manifest()
mb = b.manifest()
if match:
ma = ma.matches(m)
mb = mb.matches(m)
return mb.filesnotin(ma)
That avoids loading all modified subtrees when using tree manifests.
Hopefully it's not noticeably slower on flat manifests.
Also, you could do those steps in the caller. I don't remember if you need
the contexts for remotefilelog.
-def _forwardcopies(a, b):
+def _forwardcopies(a, b, match=None):
'''find {dst at b: src at a} copy mapping where a is an ancestor of b'''
# check for working copy
@@ -170,7 +172,7 @@ def _forwardcopies(a, b):
# we currently don't try to find where old files went, too expensive
# this means we can miss a case like 'hg rm b; hg cp a b'
cm = {}
- missing = _computeforwardmissing(a, b)
+ missing = _computeforwardmissing(a, b, match=match)
ancestrycontext = a._repo.changelog.ancestors([b.rev()],
inclusive=True)
for f in missing:
fctx = b[f]
@@ -198,16 +200,17 @@ def _backwardrenames(a, b):
r[v] = k
return r
-def pathcopies(x, y):
+def pathcopies(x, y, match=None):
'''find {dst at y: src at x} copy mapping for directed compare'''
if x == y or not x or not y:
return {}
a = y.ancestor(x)
if a == x:
- return _forwardcopies(x, y)
+ return _forwardcopies(x, y, match=match)
if a == y:
return _backwardrenames(x, y)
- return _chain(x, y, _backwardrenames(x, a), _forwardcopies(a, y))
+ return _chain(x, y, _backwardrenames(x, a),
+ _forwardcopies(a, y, match=match))
def _computenonoverlap(repo, c1, c2, addedinm1, addedinm2):
"""Computes, based on addedinm1 and addedinm2, the files exclusive to
c1
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