scmutil: create directories in a race-safe way during update
With the new parallel update code, it is possible for multiple
workers to try to create a hierarchy of directories at the same
time. This is hard to trigger in general, but most likely during
initial checkout.
To deal with these races, we introduce a new ensuredirs function
whose contract is to ensure that a directory hierarchy exists - it
will ignore a failure that implies that the desired directory already
exists.
$ . "$TESTDIR/histedit-helpers.sh"
$ cat >> $HGRCPATH <<EOF
> [extensions]
> graphlog=
> histedit=
> EOF
$ EDITED="$TESTTMP/editedhistory"
$ cat > $EDITED <<EOF
> pick 177f92b77385 c
> pick e860deea161a e
> pick 652413bf663e f
> pick 055a42cdd887 d
> EOF
$ initrepo ()
> {
> hg init r
> cd r
> for x in a b c d e f ; do
> echo $x > $x
> hg add $x
> hg ci -m $x
> done
> }
$ initrepo
log before edit
$ hg log --graph
@ changeset: 5:652413bf663e
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: f
|
o changeset: 4:e860deea161a
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: e
|
o changeset: 3:055a42cdd887
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: d
|
o changeset: 2:177f92b77385
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: c
|
o changeset: 1:d2ae7f538514
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: b
|
o changeset: 0:cb9a9f314b8b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
show the edit commands offered
$ HGEDITOR=cat hg histedit 177f92b77385
pick 177f92b77385 2 c
pick 055a42cdd887 3 d
pick e860deea161a 4 e
pick 652413bf663e 5 f
# Edit history between 177f92b77385 and 652413bf663e
#
# Commands:
# p, pick = use commit
# e, edit = use commit, but stop for amending
# f, fold = use commit, but fold into previous commit (combines N and N-1)
# d, drop = remove commit from history
# m, mess = edit message without changing commit content
#
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
edit the history
$ HGEDITOR="cat \"$EDITED\" > " hg histedit 177f92b77385 2>&1 | fixbundle
0 files updated, 0 files merged, 3 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
rules should end up in .hg/histedit-last-edit.txt:
$ cat .hg/histedit-last-edit.txt
pick 177f92b77385 c
pick e860deea161a e
pick 652413bf663e f
pick 055a42cdd887 d
log after edit
$ hg log --graph
@ changeset: 5:07114f51870f
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: d
|
o changeset: 4:8ade9693061e
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: f
|
o changeset: 3:d8249471110a
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: e
|
o changeset: 2:177f92b77385
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: c
|
o changeset: 1:d2ae7f538514
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: b
|
o changeset: 0:cb9a9f314b8b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
put things back
$ cat > $EDITED <<EOF
> pick 177f92b77385 c
> pick 07114f51870f d
> pick d8249471110a e
> pick 8ade9693061e f
> EOF
$ HGEDITOR="cat \"$EDITED\" > " hg histedit 177f92b77385 2>&1 | fixbundle
0 files updated, 0 files merged, 3 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log --graph
@ changeset: 5:7eca9b5b1148
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: f
|
o changeset: 4:915da888f2de
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: e
|
o changeset: 3:10517e47bbbb
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: d
|
o changeset: 2:177f92b77385
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: c
|
o changeset: 1:d2ae7f538514
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: b
|
o changeset: 0:cb9a9f314b8b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
slightly different this time
$ cat > $EDITED <<EOF
> pick 10517e47bbbb d
> pick 7eca9b5b1148 f
> pick 915da888f2de e
> pick 177f92b77385 c
> EOF
$ HGEDITOR="cat \"$EDITED\" > " hg histedit 177f92b77385 2>&1 | fixbundle
0 files updated, 0 files merged, 4 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log --graph
@ changeset: 5:38b92f448761
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: c
|
o changeset: 4:de71b079d9ce
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: e
|
o changeset: 3:be9ae3a309c6
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: f
|
o changeset: 2:799205341b6b
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: d
|
o changeset: 1:d2ae7f538514
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: b
|
o changeset: 0:cb9a9f314b8b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
keep prevents stripping dead revs
$ cat > $EDITED <<EOF
> pick 799205341b6b d
> pick be9ae3a309c6 f
> pick 38b92f448761 c
> pick de71b079d9ce e
> EOF
$ HGEDITOR="cat \"$EDITED\" > " hg histedit 799205341b6b --keep 2>&1 | fixbundle
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log --graph
> cat > $EDITED <<EOF
> pick de71b079d9ce e
> pick 38b92f448761 c
> EOF
@ changeset: 7:803ef1c6fcfd
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: e
|
o changeset: 6:ece0b8d93dda
| parent: 3:be9ae3a309c6
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: c
|
| o changeset: 5:38b92f448761
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: c
| |
| o changeset: 4:de71b079d9ce
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: e
|
o changeset: 3:be9ae3a309c6
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: f
|
o changeset: 2:799205341b6b
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: d
|
o changeset: 1:d2ae7f538514
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: b
|
o changeset: 0:cb9a9f314b8b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
try with --rev
$ hg histedit --commands "$EDITED" --rev -2 2>&1 | fixbundle
abort: may not use changesets other than the ones listed
$ hg log --graph
@ changeset: 7:803ef1c6fcfd
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: e
|
o changeset: 6:ece0b8d93dda
| parent: 3:be9ae3a309c6
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: c
|
| o changeset: 5:38b92f448761
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: c
| |
| o changeset: 4:de71b079d9ce
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: e
|
o changeset: 3:be9ae3a309c6
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: f
|
o changeset: 2:799205341b6b
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: d
|
o changeset: 1:d2ae7f538514
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: b
|
o changeset: 0:cb9a9f314b8b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
should also work if a commit message is missing
$ BUNDLE="$TESTDIR/missing-comment.hg"
$ hg init missing
$ cd missing
$ hg unbundle $BUNDLE
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 1 files
(run 'hg update' to get a working copy)
$ hg co tip
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log --graph
@ changeset: 2:bd22688093b3
| tag: tip
| user: Robert Altman <robert.altman@telventDTN.com>
| date: Mon Nov 28 16:40:04 2011 +0000
| summary: Update file.
|
o changeset: 1:3b3e956f9171
| user: Robert Altman <robert.altman@telventDTN.com>
| date: Mon Nov 28 16:37:57 2011 +0000
|
o changeset: 0:141947992243
user: Robert Altman <robert.altman@telventDTN.com>
date: Mon Nov 28 16:35:28 2011 +0000
summary: Checked in text file
$ hg histedit 0
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd ..