revlog: improve delta generation heuristics for generaldelta
Without this change, pulls (and clones) into a generaldelta repository could
generate very inefficient revlogs, the size of which could be at least twice
the original size.
This was caused by the generated delta chains covering too large distances,
causing new chains to be built far too often. This change addresses the
problem by forcing a delta against second parent or against the previous
revision, when the first parent delta is in danger of creating a long chain.
$ hg init test
$ cd test
$ echo a > a
$ hg add a
$ hg commit -m "test"
$ hg history
changeset: 0:acb14030fe0a
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: test
$ hg tag ' '
abort: tag names cannot consist entirely of whitespace
[255]
$ hg tag "bleah"
$ hg history
changeset: 1:d4f0d2909abc
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Added tag bleah for changeset acb14030fe0a
changeset: 0:acb14030fe0a
tag: bleah
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: test
$ echo foo >> .hgtags
$ hg tag "bleah2"
abort: working copy of .hgtags is changed (please commit .hgtags manually)
[255]
$ hg revert .hgtags
$ hg tag -r 0 x y z y y z
abort: tag names must be unique
[255]
$ hg tag tap nada dot tip null .
abort: the name 'tip' is reserved
[255]
$ hg tag "bleah"
abort: tag 'bleah' already exists (use -f to force)
[255]
$ hg tag "blecch" "bleah"
abort: tag 'bleah' already exists (use -f to force)
[255]
$ hg tag --remove "blecch"
abort: tag 'blecch' does not exist
[255]
$ hg tag --remove "bleah" "blecch" "blough"
abort: tag 'blecch' does not exist
[255]
$ hg tag -r 0 "bleah0"
$ hg tag -l -r 1 "bleah1"
$ hg tag gack gawk gorp
$ hg tag -f gack
$ hg tag --remove gack gorp
$ hg tag "bleah "
abort: tag 'bleah' already exists (use -f to force)
[255]
$ hg tag " bleah"
abort: tag 'bleah' already exists (use -f to force)
[255]
$ hg tag " bleah"
abort: tag 'bleah' already exists (use -f to force)
[255]
$ hg tag -r 0 " bleahbleah "
$ hg tag -r 0 " bleah bleah "
$ cat .hgtags
acb14030fe0a21b60322c440ad2d20cf7685a376 bleah
acb14030fe0a21b60322c440ad2d20cf7685a376 bleah0
336fccc858a4eb69609a291105009e484a6b6b8d gack
336fccc858a4eb69609a291105009e484a6b6b8d gawk
336fccc858a4eb69609a291105009e484a6b6b8d gorp
336fccc858a4eb69609a291105009e484a6b6b8d gack
799667b6f2d9b957f73fa644a918c2df22bab58f gack
799667b6f2d9b957f73fa644a918c2df22bab58f gack
0000000000000000000000000000000000000000 gack
336fccc858a4eb69609a291105009e484a6b6b8d gorp
0000000000000000000000000000000000000000 gorp
acb14030fe0a21b60322c440ad2d20cf7685a376 bleahbleah
acb14030fe0a21b60322c440ad2d20cf7685a376 bleah bleah
$ cat .hg/localtags
d4f0d2909abc9290e2773c08837d70c1794e3f5a bleah1
tagging on a non-head revision
$ hg update 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg tag -l localblah
$ hg tag "foobar"
abort: not at a branch head (use -f to force)
[255]
$ hg tag -f "foobar"
$ cat .hgtags
acb14030fe0a21b60322c440ad2d20cf7685a376 foobar
$ cat .hg/localtags
d4f0d2909abc9290e2773c08837d70c1794e3f5a bleah1
acb14030fe0a21b60322c440ad2d20cf7685a376 localblah
$ hg tag -l 'xx
> newline'
abort: '\n' cannot be used in a tag name
[255]
$ hg tag -l 'xx:xx'
abort: ':' cannot be used in a tag name
[255]
cloning local tags
$ cd ..
$ hg -R test log -r0:5
changeset: 0:acb14030fe0a
tag: bleah
tag: bleah bleah
tag: bleah0
tag: bleahbleah
tag: foobar
tag: localblah
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: test
changeset: 1:d4f0d2909abc
tag: bleah1
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Added tag bleah for changeset acb14030fe0a
changeset: 2:336fccc858a4
tag: gawk
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Added tag bleah0 for changeset acb14030fe0a
changeset: 3:799667b6f2d9
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Added tag gack, gawk, gorp for changeset 336fccc858a4
changeset: 4:154eeb7c0138
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Added tag gack for changeset 799667b6f2d9
changeset: 5:b4bb47aaff09
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Removed tag gack, gorp
$ hg clone -q -rbleah1 test test1
$ hg -R test1 parents --style=compact
1[tip] d4f0d2909abc 1970-01-01 00:00 +0000 test
Added tag bleah for changeset acb14030fe0a
$ hg clone -q -r5 test#bleah1 test2
$ hg -R test2 parents --style=compact
5[tip] b4bb47aaff09 1970-01-01 00:00 +0000 test
Removed tag gack, gorp
$ hg clone -q -U test#bleah1 test3
$ hg -R test3 parents --style=compact
$ cd test
Issue601: hg tag doesn't do the right thing if .hgtags or localtags
doesn't end with EOL
$ python << EOF
> f = file('.hg/localtags'); last = f.readlines()[-1][:-1]; f.close()
> f = file('.hg/localtags', 'w'); f.write(last); f.close()
> EOF
$ cat .hg/localtags; echo
acb14030fe0a21b60322c440ad2d20cf7685a376 localblah
$ hg tag -l localnewline
$ cat .hg/localtags; echo
acb14030fe0a21b60322c440ad2d20cf7685a376 localblah
c2899151f4e76890c602a2597a650a72666681bf localnewline
$ python << EOF
> f = file('.hgtags'); last = f.readlines()[-1][:-1]; f.close()
> f = file('.hgtags', 'w'); f.write(last); f.close()
> EOF
$ hg ci -m'broken manual edit of .hgtags'
$ cat .hgtags; echo
acb14030fe0a21b60322c440ad2d20cf7685a376 foobar
$ hg tag newline
$ cat .hgtags; echo
acb14030fe0a21b60322c440ad2d20cf7685a376 foobar
a0eea09de1eeec777b46f2085260a373b2fbc293 newline
tag and branch using same name
$ hg branch tag-and-branch-same-name
marked working directory as branch tag-and-branch-same-name
$ hg ci -m"discouraged"
$ hg tag tag-and-branch-same-name
warning: tag tag-and-branch-same-name conflicts with existing branch name
test custom commit messages
$ cat > editor << '__EOF__'
> #!/bin/sh
> echo "custom tag message" > "$1"
> echo "second line" >> "$1"
> __EOF__
$ chmod +x editor
$ HGEDITOR="'`pwd`'"/editor hg tag custom-tag -e
$ hg log -l1 --template "{desc}\n"
custom tag message
second line
local tag with .hgtags modified
$ hg tag hgtags-modified
$ hg rollback
repository tip rolled back to revision 13 (undo commit)
working directory now based on revision 13
$ hg st
M .hgtags
? .hgtags.orig
? editor
$ hg tag --local baz
$ hg revert --no-backup .hgtags
tagging when at named-branch-head that's not a topo-head
$ hg up default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg merge -t internal:local
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -m 'merge named branch'
$ hg up 13
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg tag new-topo-head
tagging on null rev
$ hg up null
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg tag nullrev
abort: not at a branch head (use -f to force)
[255]
$ hg init empty
$ hg tag -R empty nullrev
$ cd ..
tagging on an uncommitted merge (issue2542)
$ hg init repo-tag-uncommitted-merge
$ cd repo-tag-uncommitted-merge
$ echo c1 > f1
$ hg ci -Am0
adding f1
$ echo c2 > f2
$ hg ci -Am1
adding f2
$ hg co -q 0
$ hg branch b1
marked working directory as branch b1
$ hg ci -m2
$ hg up default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg merge b1
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg tag t1
abort: uncommitted merge
[255]
$ hg status
$ hg tag --rev 1 t2
abort: uncommitted merge
[255]
$ hg tag --rev 1 --local t3
$ hg tags -v
tip 2:2a156e8887cc
t3 1:c3adabd1a5f4 local
$ cd ..