Mercurial > hg
view tests/test-symlink-placeholder.t @ 25881:9de443515f1d stable
help: scripting help topic
There are a lot of non-human consumers of Mercurial. And the challenges
and considerations for machines consuming Mercurial is significantly
different from what humans face.
I think there are enough special considerations around how machines
consume Mercurial that a dedicated help topic is warranted. I concede
the audience for this topic is probably small compared to the general
audience. However, lots of normal Mercurial users do things like create
one-off shell scripts for common workflows that I think this is useful
enough to be in the install (as opposed to, say, a wiki page - which
most users will likely never find).
This text is by no means perfect. But you have to start somewhere. I
think I did cover the important parts, though.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 18 Jul 2015 17:10:28 -0700 |
parents | 7a9cbb315d84 |
children | 0a10f142299d |
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#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 ..