Mercurial > hg
annotate mercurial/txnutil.py @ 35616:706aa203b396
fileset: add a lightweight file filtering language
This patch was inspired by one that Jun Wu authored for the fb-experimental
repo, to avoid using matcher for efficiency[1]. We want a way to specify what
files will be converted to LFS at commit time. And per discussion, we also want
to specify what files to skip, text diff, or merge in another config option.
The current `lfs.threshold` config option could not satisfy complex needs. I'm
putting it in a core package because Augie floated the idea of also using it for
narrow and sparse.
Yuya suggested farming out to fileset.parse(), which added support for more
symbols. The only fileset element not supported here is 'negate'. (List isn't
supported by filesets either.) I also changed the 'always' token to the 'all()'
predicate for consistency, and introduced 'none()' to improve readability in a
future tracked file based config. The extension operator was changed from '.'
to '**', to match how recursive path globs are specified. Finally, I changed
the path matcher from '/' to 'path:' at Yuya's suggestion, for consistency with
matcher. Unfortunately, ':' is currently reserved in filesets, so this has to
be quoted to be processed as a string instead of a symbol[2]. We should
probably revisit that, because it's seriously ugly. But it's only used by an
experimental extension, and I think using a file based config for LFS may drive
some more tweaks, so I'm settling for this for now.
I reserved all of the glob characters in fileset except '.' and '_' for the
extension test because those are likely valid extension characters.
Sample filter settings:
all() # everything
size(">20MB") # larger than 20MB
!**.txt # except for .txt files
**.zip | **.tar.gz | **.7z # some types of compressed files
"path:bin" # files under "bin" in the project root
[1] https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-December/109387.html
[2] https://www.mercurial-scm.org/pipermail/mercurial-devel/2018-January/109729.html
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Wed, 10 Jan 2018 22:23:34 -0500 |
parents | 206532700213 |
children | 2372284d9457 |
rev | line source |
---|---|
31050
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
1 # txnutil.py - transaction related utilities |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
2 # |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
3 # Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> and others |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
4 # |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
5 # This software may be used and distributed according to the terms of the |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
6 # GNU General Public License version 2 or any later version. |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
7 |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
8 from __future__ import absolute_import |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
9 |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
10 import errno |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
11 |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
12 from . import ( |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
13 encoding, |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
14 ) |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
15 |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
16 def mayhavepending(root): |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
17 '''return whether 'root' may have pending changes, which are |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
18 visible to this process. |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
19 ''' |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
20 return root == encoding.environ.get('HG_PENDING') |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
21 |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
22 def trypending(root, vfs, filename, **kwargs): |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
23 '''Open file to be read according to HG_PENDING environment variable |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
24 |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
25 This opens '.pending' of specified 'filename' only when HG_PENDING |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
26 is equal to 'root'. |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
27 |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
28 This returns '(fp, is_pending_opened)' tuple. |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
29 ''' |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
30 if mayhavepending(root): |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
31 try: |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
32 return (vfs('%s.pending' % filename, **kwargs), True) |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
33 except IOError as inst: |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
34 if inst.errno != errno.ENOENT: |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
35 raise |
206532700213
txnutil: factor out the logic to read file in according to HG_PENDING
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
diff
changeset
|
36 return (vfs(filename, **kwargs), False) |