Mercurial > hg
view tests/test-symlink-placeholder.t @ 31553:56acc4250900
scmutil: add a simple key-value file helper
The purpose of the added class is to serve purposes like save files of shelve
or state files of shelve, rebase and histedit. Keys of these files can be
alphanumeric and start with letters, while values must not contain newlines.
In light of Mercurial's reluctancy to use Python's json module, this tries
to provide a reasonable alternative for a non-nested named data.
Comparing to current approach of storing state in plain text files, where
semantic meaning of lines of text is only determined by their oreder,
simple key-value file allows for reordering lines and thus helps handle
optional values.
Initial use-case I see for this is obs-shelve's shelve files. Later we
can possibly migrate state files to this approach.
The test is in a new file beause I did not figure out where to put it
within existing test suite. If you give me a better idea, I will gladly
follow it.
author | Kostia Balytskyi <ikostia@fb.com> |
---|---|
date | Fri, 10 Mar 2017 14:33:42 -0800 |
parents | 7a9cbb315d84 |
children | 0a10f142299d |
line wrap: on
line source
#require symlink Create extension that can disable symlink support: $ cat > nolink.py <<EOF > from mercurial import extensions, util > def setflags(orig, f, l, x): > pass > def checklink(orig, path): > return False > def extsetup(ui): > extensions.wrapfunction(util, 'setflags', setflags) > extensions.wrapfunction(util, 'checklink', checklink) > EOF $ hg init unix-repo $ cd unix-repo $ echo foo > a $ ln -s a b $ hg ci -Am0 adding a adding b $ cd .. Simulate a checkout shared on NFS/Samba: $ hg clone -q unix-repo shared $ cd shared $ rm b $ echo foo > b $ hg --config extensions.n=$TESTTMP/nolink.py status --debug ignoring suspect symlink placeholder "b" Make a clone using placeholders: $ hg --config extensions.n=$TESTTMP/nolink.py clone . ../win-repo updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd ../win-repo $ cat b a (no-eol) $ hg --config extensions.n=$TESTTMP/nolink.py st --debug Empty placeholder: $ rm b $ touch b $ hg --config extensions.n=$TESTTMP/nolink.py st --debug ignoring suspect symlink placeholder "b" Write binary data to the placeholder: >>> open('b', 'w').write('this is a binary\0') $ hg --config extensions.n=$TESTTMP/nolink.py st --debug ignoring suspect symlink placeholder "b" Write a long string to the placeholder: >>> open('b', 'w').write('this' * 1000) $ hg --config extensions.n=$TESTTMP/nolink.py st --debug ignoring suspect symlink placeholder "b" Commit shouldn't succeed: $ hg --config extensions.n=$TESTTMP/nolink.py ci -m1 nothing changed [1] Write a valid string to the placeholder: >>> open('b', 'w').write('this') $ hg --config extensions.n=$TESTTMP/nolink.py st --debug M b $ hg --config extensions.n=$TESTTMP/nolink.py ci -m1 $ hg manifest tip --verbose 644 a 644 @ b $ cd ..