tests/test-glog

Add support for multiple possible bisect results (issue1228, issue1182)

The real reason for both issue is that bisect can not handle cases where there
are multiple possibilities for the result.

Example (from issue1228):
rev 0 -> good
rev 1 -> skipped
rev 2 -> skipped
rev 3 -> skipped
rev 4 -> bad

Note that this patch does not only fix the reported Assertion Error but also
the problem of a non converging bisect:

hg init
for i in `seq 3`; do echo $i > $i; hg add $i; hg ci -m$i; done
hg bisect -b 2
hg bisect -g 0
hg bisect -s

From this state on, you can:
 a) mark as bad forever (non converging!)
 b) mark as good to get an inconsistent state
 c) skip for the Assertion Error

Minor description and code edits by pmezard.

#!/bin/sh

# @  (34) head
# |
# | o  (33) head
# | |
# o |    (32) expand
# |\ \
# | o \    (31) expand
# | |\ \
# | | o \    (30) expand
# | | |\ \
# | | | o |  (29) regular commit
# | | | | |
# | | o | |    (28) merge zero known
# | | |\ \ \
# o | | | | |  (27) collapse
# |/ / / / /
# | | o---+  (26) merge one known; far right
# | | | | |
# +---o | |  (25) merge one known; far left
# | | | | |
# | | o | |  (24) merge one known; immediate right
# | | |\| |
# | | o | |  (23) merge one known; immediate left
# | |/| | |
# +---o---+  (22) merge two known; one far left, one far right
# | |  / /
# o | | |    (21) expand
# |\ \ \ \
# | o---+-+  (20) merge two known; two far right
# |  / / /
# o | | |    (19) expand
# |\ \ \ \
# +---+---o  (18) merge two known; two far left
# | | | |
# | o | |    (17) expand
# | |\ \ \
# | | o---+  (16) merge two known; one immediate right, one near right
# | | |/ /
# o | | |    (15) expand
# |\ \ \ \
# | o-----+  (14) merge two known; one immediate right, one far right
# | |/ / /
# o | | |    (13) expand
# |\ \ \ \
# +---o | |  (12) merge two known; one immediate right, one far left
# | | |/ /
# | o | |    (11) expand
# | |\ \ \
# | | o---+  (10) merge two known; one immediate left, one near right
# | |/ / /
# o | | |    (9) expand
# |\ \ \ \
# | o-----+  (8) merge two known; one immediate left, one far right
# |/ / / /
# o | | |    (7) expand
# |\ \ \ \
# +---o | |  (6) merge two known; one immediate left, one far left
# | |/ / /
# | o | |    (5) expand
# | |\ \ \
# | | o | |  (4) merge two known; one immediate left, one immediate right
# | |/|/ /
# | o / /  (3) collapse
# |/ / /
# o / /  (2) collapse
# |/ /
# o /  (1) collapse
# |/
# o  (0) root

set -e

commit()
{
    rev=$1
    msg=$2
    shift 2
    if [ "$#" -gt 0 ]; then
        hg debugsetparents "$@"
    fi
    echo $rev > $rev
    hg add $rev
    hg rawcommit -q -d "$rev 0" -m "($rev) $msg" $rev
}

echo "[extensions]" >> $HGRCPATH
echo "graphlog=" >> $HGRCPATH

echo % init
hg init repo

cd repo

echo % empty repo
hg glog

echo % building tree
commit 0 "root"
commit 1 "collapse" 0
commit 2 "collapse" 1
commit 3 "collapse" 2
commit 4 "merge two known; one immediate left, one immediate right" 1 3
commit 5 "expand" 3 4
commit 6 "merge two known; one immediate left, one far left" 2 5
commit 7 "expand" 2 5
commit 8 "merge two known; one immediate left, one far right" 0 7
commit 9 "expand" 7 8
commit 10 "merge two known; one immediate left, one near right" 0 6
commit 11 "expand" 6 10
commit 12 "merge two known; one immediate right, one far left" 1 9
commit 13 "expand" 9 11
commit 14 "merge two known; one immediate right, one far right" 0 12
commit 15 "expand" 13 14
commit 16 "merge two known; one immediate right, one near right" 0 1
commit 17 "expand" 12 16
commit 18 "merge two known; two far left" 1 15
commit 19 "expand" 15 17
commit 20 "merge two known; two far right" 0 18
commit 21 "expand" 19 20
commit 22 "merge two known; one far left, one far right" 18 21
commit 23 "merge one known; immediate left" 1 22
commit 24 "merge one known; immediate right" 0 23
commit 25 "merge one known; far left" 21 24
commit 26 "merge one known; far right" 18 25
commit 27 "collapse" 21
commit 28 "merge zero known" 1 26
commit 29 "regular commit" 0
commit 30 "expand" 28 29
commit 31 "expand" 21 30
commit 32 "expand" 27 31
commit 33 "head" 18
commit 34 "head" 32

echo % glog -q
hg glog -q

echo % glog
hg glog

echo % file glog
hg glog 5

echo % unused arguments
hg glog -q foo bar || echo failed