Mercurial > hg
view tests/test-hardlinks.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 | 6a672c3b7860 |
children | e7a02e9ad162 |
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#require hardlink $ cat > nlinks.py <<EOF > import sys > from mercurial import util > for f in sorted(sys.stdin.readlines()): > f = f[:-1] > print util.nlinks(f), f > EOF $ nlinksdir() > { > find $1 -type f | python $TESTTMP/nlinks.py > } Some implementations of cp can't create hardlinks (replaces 'cp -al' on Linux): $ cat > linkcp.py <<EOF > from mercurial import util > import sys > util.copyfiles(sys.argv[1], sys.argv[2], hardlink=True) > EOF $ linkcp() > { > python $TESTTMP/linkcp.py $1 $2 > } Prepare repo r1: $ hg init r1 $ cd r1 $ echo c1 > f1 $ hg add f1 $ hg ci -m0 $ mkdir d1 $ cd d1 $ echo c2 > f2 $ hg add f2 $ hg ci -m1 $ cd ../.. $ nlinksdir r1/.hg/store 1 r1/.hg/store/00changelog.i 1 r1/.hg/store/00manifest.i 1 r1/.hg/store/data/d1/f2.i 1 r1/.hg/store/data/f1.i 1 r1/.hg/store/fncache 1 r1/.hg/store/phaseroots 1 r1/.hg/store/undo 1 r1/.hg/store/undo.backup.fncache 1 r1/.hg/store/undo.backupfiles 1 r1/.hg/store/undo.phaseroots Create hardlinked clone r2: $ hg clone -U --debug r1 r2 --config progress.debug=true linking: 1 linking: 2 linking: 3 linking: 4 linking: 5 linking: 6 linking: 7 linked 7 files Create non-hardlinked clone r3: $ hg clone --pull r1 r3 requesting all changes adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 2 files updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved Repos r1 and r2 should now contain hardlinked files: $ nlinksdir r1/.hg/store 2 r1/.hg/store/00changelog.i 2 r1/.hg/store/00manifest.i 2 r1/.hg/store/data/d1/f2.i 2 r1/.hg/store/data/f1.i 2 r1/.hg/store/fncache 1 r1/.hg/store/phaseroots 1 r1/.hg/store/undo 1 r1/.hg/store/undo.backup.fncache 1 r1/.hg/store/undo.backupfiles 1 r1/.hg/store/undo.phaseroots $ nlinksdir r2/.hg/store 2 r2/.hg/store/00changelog.i 2 r2/.hg/store/00manifest.i 2 r2/.hg/store/data/d1/f2.i 2 r2/.hg/store/data/f1.i 2 r2/.hg/store/fncache Repo r3 should not be hardlinked: $ nlinksdir r3/.hg/store 1 r3/.hg/store/00changelog.i 1 r3/.hg/store/00manifest.i 1 r3/.hg/store/data/d1/f2.i 1 r3/.hg/store/data/f1.i 1 r3/.hg/store/fncache 1 r3/.hg/store/phaseroots 1 r3/.hg/store/undo 1 r3/.hg/store/undo.backupfiles 1 r3/.hg/store/undo.phaseroots Create a non-inlined filelog in r3: $ cd r3/d1 >>> f = open('data1', 'wb') >>> for x in range(10000): ... f.write("%s\n" % str(x)) >>> f.close() $ for j in 0 1 2 3 4 5 6 7 8 9; do > cat data1 >> f2 > hg commit -m$j > done $ cd ../.. $ nlinksdir r3/.hg/store 1 r3/.hg/store/00changelog.i 1 r3/.hg/store/00manifest.i 1 r3/.hg/store/data/d1/f2.d 1 r3/.hg/store/data/d1/f2.i 1 r3/.hg/store/data/f1.i 1 r3/.hg/store/fncache 1 r3/.hg/store/phaseroots 1 r3/.hg/store/undo 1 r3/.hg/store/undo.backup.fncache 1 r3/.hg/store/undo.backup.phaseroots 1 r3/.hg/store/undo.backupfiles 1 r3/.hg/store/undo.phaseroots Push to repo r1 should break up most hardlinks in r2: $ hg -R r2 verify checking changesets checking manifests crosschecking files in changesets and manifests checking files 2 files, 2 changesets, 2 total revisions $ cd r3 $ hg push pushing to $TESTTMP/r1 (glob) searching for changes adding changesets adding manifests adding file changes added 10 changesets with 10 changes to 1 files $ cd .. $ nlinksdir r2/.hg/store 1 r2/.hg/store/00changelog.i 1 r2/.hg/store/00manifest.i 1 r2/.hg/store/data/d1/f2.i 2 r2/.hg/store/data/f1.i 1 r2/.hg/store/fncache $ hg -R r2 verify checking changesets checking manifests crosschecking files in changesets and manifests checking files 2 files, 2 changesets, 2 total revisions $ cd r1 $ hg up 1 files updated, 0 files merged, 0 files removed, 0 files unresolved Committing a change to f1 in r1 must break up hardlink f1.i in r2: $ echo c1c1 >> f1 $ hg ci -m00 $ cd .. $ nlinksdir r2/.hg/store 1 r2/.hg/store/00changelog.i 1 r2/.hg/store/00manifest.i 1 r2/.hg/store/data/d1/f2.i 1 r2/.hg/store/data/f1.i 1 r2/.hg/store/fncache $ cd r3 $ hg tip --template '{rev}:{node|short}\n' 11:a6451b6bc41f $ echo bla > f1 $ hg ci -m1 $ cd .. Create hardlinked copy r4 of r3 (on Linux, we would call 'cp -al'): $ linkcp r3 r4 r4 has hardlinks in the working dir (not just inside .hg): $ nlinksdir r4 2 r4/.hg/00changelog.i 2 r4/.hg/branch 2 r4/.hg/cache/branch2-served 2 r4/.hg/cache/checkisexec 3 r4/.hg/cache/checklink (?) ? r4/.hg/cache/checklink-target (glob) 2 r4/.hg/cache/checknoexec 2 r4/.hg/cache/rbc-names-v1 2 r4/.hg/cache/rbc-revs-v1 2 r4/.hg/dirstate 2 r4/.hg/hgrc 2 r4/.hg/last-message.txt 2 r4/.hg/requires 2 r4/.hg/store/00changelog.i 2 r4/.hg/store/00manifest.i 2 r4/.hg/store/data/d1/f2.d 2 r4/.hg/store/data/d1/f2.i 2 r4/.hg/store/data/f1.i 2 r4/.hg/store/fncache 2 r4/.hg/store/phaseroots 2 r4/.hg/store/undo 2 r4/.hg/store/undo.backup.fncache 2 r4/.hg/store/undo.backup.phaseroots 2 r4/.hg/store/undo.backupfiles 2 r4/.hg/store/undo.phaseroots 2 r4/.hg/undo.backup.dirstate 2 r4/.hg/undo.bookmarks 2 r4/.hg/undo.branch 2 r4/.hg/undo.desc 2 r4/.hg/undo.dirstate 2 r4/d1/data1 2 r4/d1/f2 2 r4/f1 Update back to revision 11 in r4 should break hardlink of file f1: $ hg -R r4 up 11 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ nlinksdir r4 2 r4/.hg/00changelog.i 1 r4/.hg/branch 2 r4/.hg/cache/branch2-served 2 r4/.hg/cache/checkisexec 2 r4/.hg/cache/checklink-target 2 r4/.hg/cache/checknoexec 2 r4/.hg/cache/rbc-names-v1 2 r4/.hg/cache/rbc-revs-v1 1 r4/.hg/dirstate 2 r4/.hg/hgrc 2 r4/.hg/last-message.txt 2 r4/.hg/requires 2 r4/.hg/store/00changelog.i 2 r4/.hg/store/00manifest.i 2 r4/.hg/store/data/d1/f2.d 2 r4/.hg/store/data/d1/f2.i 2 r4/.hg/store/data/f1.i 2 r4/.hg/store/fncache 2 r4/.hg/store/phaseroots 2 r4/.hg/store/undo 2 r4/.hg/store/undo.backup.fncache 2 r4/.hg/store/undo.backup.phaseroots 2 r4/.hg/store/undo.backupfiles 2 r4/.hg/store/undo.phaseroots 2 r4/.hg/undo.backup.dirstate 2 r4/.hg/undo.bookmarks 2 r4/.hg/undo.branch 2 r4/.hg/undo.desc 2 r4/.hg/undo.dirstate 2 r4/d1/data1 2 r4/d1/f2 1 r4/f1 Test hardlinking outside hg: $ mkdir x $ echo foo > x/a $ linkcp x y $ echo bar >> y/a No diff if hardlink: $ diff x/a y/a Test mq hardlinking: $ echo "[extensions]" >> $HGRCPATH $ echo "mq=" >> $HGRCPATH $ hg init a $ cd a $ hg qimport -n foo - << EOF > # HG changeset patch > # Date 1 0 > diff -r 2588a8b53d66 a > --- /dev/null Thu Jan 01 00:00:00 1970 +0000 > +++ b/a Wed Jul 23 15:54:29 2008 +0200 > @@ -0,0 +1,1 @@ > +a > EOF adding foo to series file $ hg qpush applying foo now at: foo $ cd .. $ linkcp a b $ cd b $ hg qimport -n bar - << EOF > # HG changeset patch > # Date 2 0 > diff -r 2588a8b53d66 a > --- /dev/null Thu Jan 01 00:00:00 1970 +0000 > +++ b/b Wed Jul 23 15:54:29 2008 +0200 > @@ -0,0 +1,1 @@ > +b > EOF adding bar to series file $ hg qpush applying bar now at: bar $ cat .hg/patches/status 430ed4828a74fa4047bc816a25500f7472ab4bfe:foo 4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c:bar $ cat .hg/patches/series foo bar $ cat ../a/.hg/patches/status 430ed4828a74fa4047bc816a25500f7472ab4bfe:foo $ cat ../a/.hg/patches/series foo Test tags hardlinking: $ hg qdel -r qbase:qtip patch foo finalized without changeset message patch bar finalized without changeset message $ hg tag -l lfoo $ hg tag foo $ cd .. $ linkcp b c $ cd c $ hg tag -l -r 0 lbar $ hg tag -r 0 bar $ cat .hgtags 4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c foo 430ed4828a74fa4047bc816a25500f7472ab4bfe bar $ cat .hg/localtags 4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c lfoo 430ed4828a74fa4047bc816a25500f7472ab4bfe lbar $ cat ../b/.hgtags 4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c foo $ cat ../b/.hg/localtags 4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c lfoo $ cd ..