tests: demonstrate that no requested merge tool is ignored if missing

If you explicitly configure a merge tool, it seems wrong that we don't
even warn if we can't find it. This patch adds a test case that
demonstrates that.

Differential Revision: https://phab.mercurial-scm.org/D3974

tests/test-merge-tools.t

@@ -1,1850 +1,1872 b''
 test merge-tools configuration - mostly exercising filemerge.py
 
   $ unset HGMERGE # make sure HGMERGE doesn't interfere with the test
   $ hg init repo
   $ cd repo
 
 revision 0
 
   $ echo "revision 0" > f
   $ echo "space" >> f
   $ hg commit -Am "revision 0"
   adding f
 
 revision 1
 
   $ echo "revision 1" > f
   $ echo "space" >> f
   $ hg commit -Am "revision 1"
   $ hg update 0 > /dev/null
 
 revision 2
 
   $ echo "revision 2" > f
   $ echo "space" >> f
   $ hg commit -Am "revision 2"
   created new head
   $ hg update 0 > /dev/null
 
 revision 3 - simple to merge
 
   $ echo "revision 3" >> f
   $ hg commit -Am "revision 3"
   created new head
 
 revision 4 - hard to merge
 
   $ hg update 0 > /dev/null
   $ echo "revision 4" > f
   $ hg commit -Am "revision 4"
   created new head
 
   $ echo "[merge-tools]" > .hg/hgrc
 
   $ beforemerge() {
   >   cat .hg/hgrc
   >   echo "# hg update -C 1"
   >   hg update -C 1 > /dev/null
   > }
   $ aftermerge() {
   >   echo "# cat f"
   >   cat f
   >   echo "# hg stat"
   >   hg stat
   >   echo "# hg resolve --list"
   >   hg resolve --list
   >   rm -f f.orig
   > }
 
 Tool selection
 
 default is internal merge:
 
   $ beforemerge
   [merge-tools]
   # hg update -C 1
 
 hg merge -r 2
 override $PATH to ensure hgmerge not visible; use $PYTHON in case we're
 running from a devel copy, not a temp installation
 
   $ PATH="$BINDIR:/usr/sbin" $PYTHON "$BINDIR"/hg merge -r 2
   merging f
   warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   <<<<<<< working copy: ef83787e2614 - test: revision 1
   revision 1
   =======
   revision 2
   >>>>>>> merge rev:    0185f4e0cf02 - test: revision 2
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 simplest hgrc using false for merge:
 
   $ echo "false.whatever=" >> .hg/hgrc
   $ beforemerge
   [merge-tools]
   false.whatever=
   # hg update -C 1
   $ hg merge -r 2
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 #if unix-permissions
 
 unexecutable file in $PATH shouldn't be found:
 
   $ echo "echo fail" > false
   $ hg up -qC 1
   $ PATH="`pwd`:$BINDIR:/usr/sbin" $PYTHON "$BINDIR"/hg merge -r 2
   merging f
   warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ rm false
 
 #endif
 
 executable directory in $PATH shouldn't be found:
 
   $ mkdir false
   $ hg up -qC 1
   $ PATH="`pwd`:$BINDIR:/usr/sbin" $PYTHON "$BINDIR"/hg merge -r 2
   merging f
   warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ rmdir false
 
 true with higher .priority gets precedence:
 
   $ echo "true.priority=1" >> .hg/hgrc
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   # hg update -C 1
   $ hg merge -r 2
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 unless lowered on command line:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.priority=-7
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 or false set higher on command line:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.false.priority=117
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 or true set to disabled:
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.disabled=yes
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 or true.executable not found in PATH:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable=nonexistentmergetool
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 or true.executable with bogus path:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable=/nonexistent/mergetool
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 but true.executable set to cat found in PATH works:
 
   $ echo "true.executable=cat" >> .hg/hgrc
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2
   merging f
   revision 1
   space
   revision 0
   space
   revision 2
   space
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 and true.executable set to cat with path works:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable=cat
   merging f
   revision 1
   space
   revision 0
   space
   revision 2
   space
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 executable set to python script that succeeds:
 
   $ cat > "$TESTTMP/myworkingmerge.py" <<EOF
   > def myworkingmergefn(ui, repo, args, **kwargs):
   >     return False
   > EOF
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/myworkingmerge.py:myworkingmergefn"
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 executable set to python script that fails:
 
   $ cat > "$TESTTMP/mybrokenmerge.py" <<EOF
   > def mybrokenmergefn(ui, repo, args, **kwargs):
   >     ui.write(b"some fail message\n")
   >     return True
   > EOF
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/mybrokenmerge.py:mybrokenmergefn"
   merging f
   some fail message
   abort: $TESTTMP/mybrokenmerge.py hook failed
   [255]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   ? f.orig
   # hg resolve --list
   U f
 
 executable set to python script that is missing function:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/myworkingmerge.py:missingFunction"
   merging f
   abort: $TESTTMP/myworkingmerge.py does not have function: missingFunction
   [255]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   ? f.orig
   # hg resolve --list
   U f
 
 executable set to missing python script:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/missingpythonscript.py:mergefn"
   merging f
   abort: loading python merge script failed: $TESTTMP/missingpythonscript.py
   [255]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   ? f.orig
   # hg resolve --list
   U f
 
 executable set to python script but callable function is missing:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/myworkingmerge.py"
   abort: invalid 'python:' syntax: python:$TESTTMP/myworkingmerge.py
   [255]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   # hg resolve --list
   U f
 
 executable set to python script but callable function is empty string:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/myworkingmerge.py:"
   abort: invalid 'python:' syntax: python:$TESTTMP/myworkingmerge.py:
   [255]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   # hg resolve --list
   U f
 
 executable set to python script but callable function is missing and path contains colon:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/some:dir/myworkingmerge.py"
   abort: invalid 'python:' syntax: python:$TESTTMP/some:dir/myworkingmerge.py
   [255]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   # hg resolve --list
   U f
 
 executable set to python script filename that contains spaces:
 
   $ mkdir -p "$TESTTMP/my path"
   $ cat > "$TESTTMP/my path/my working merge with spaces in filename.py" <<EOF
   > def myworkingmergefn(ui, repo, args, **kwargs):
   >     return False
   > EOF
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config "merge-tools.true.executable=python:$TESTTMP/my path/my working merge with spaces in filename.py:myworkingmergefn"
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 #if unix-permissions
 
 environment variables in true.executable are handled:
 
   $ echo 'echo "custom merge tool"' > .hg/merge.sh
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg --config merge-tools.true.executable='sh' \
   >    --config merge-tools.true.args=.hg/merge.sh \
   >    merge -r 2
   merging f
   custom merge tool
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 #endif
 
 Tool selection and merge-patterns
 
 merge-patterns specifies new tool false:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-patterns.f=false
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 merge-patterns specifies executable not found in PATH and gets warning:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-patterns.f=true --config merge-tools.true.executable=nonexistentmergetool
   couldn't find merge tool true (for pattern f)
   merging f
   couldn't find merge tool true (for pattern f)
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 merge-patterns specifies executable with bogus path and gets warning:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-patterns.f=true --config merge-tools.true.executable=/nonexistent/mergetool
   couldn't find merge tool true (for pattern f)
   merging f
   couldn't find merge tool true (for pattern f)
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 ui.merge overrules priority
 
 ui.merge specifies false:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=false
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 ui.merge specifies internal:fail:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=internal:fail
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   U f
 
 ui.merge specifies :local (without internal prefix):
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=:local
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 ui.merge specifies internal:other:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=internal:other
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 2
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 ui.merge specifies internal:prompt:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=internal:prompt
   keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? u
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   U f
 
 ui.merge specifies :prompt, with 'leave unresolved' chosen
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=:prompt --config ui.interactive=True << EOF
   > u
   > EOF
   keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? u
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   U f
 
 prompt with EOF
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=internal:prompt --config ui.interactive=true
   keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? 
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   U f
   $ hg resolve --all --config ui.merge=internal:prompt --config ui.interactive=true
   keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? 
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
   $ rm f
   $ hg resolve --all --config ui.merge=internal:prompt --config ui.interactive=true
   keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? 
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   U f
   $ hg resolve --all --config ui.merge=internal:prompt
   keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? u
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 ui.merge specifies internal:dump:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=internal:dump
   merging f
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.base
   ? f.local
   ? f.orig
   ? f.other
   # hg resolve --list
   U f
 
 f.base:
 
   $ cat f.base
   revision 0
   space
 
 f.local:
 
   $ cat f.local
   revision 1
   space
 
 f.other:
 
   $ cat f.other
   revision 2
   space
   $ rm f.base f.local f.other
 
 check that internal:dump doesn't dump files if premerge runs
 successfully
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 3 --config ui.merge=internal:dump
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
   $ aftermerge
   # cat f
   revision 1
   space
   revision 3
   # hg stat
   M f
   # hg resolve --list
   R f
 
 check that internal:forcedump dumps files, even if local and other can
 be merged easily
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 3 --config ui.merge=internal:forcedump
   merging f
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.base
   ? f.local
   ? f.orig
   ? f.other
   # hg resolve --list
   U f
 
   $ cat f.base
   revision 0
   space
 
   $ cat f.local
   revision 1
   space
 
   $ cat f.other
   revision 0
   space
   revision 3
 
   $ rm -f f.base f.local f.other
 
 ui.merge specifies internal:other but is overruled by pattern for false:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=internal:other --config merge-patterns.f=false
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 Premerge
 
 ui.merge specifies internal:other but is overruled by --tool=false
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config ui.merge=internal:other --tool=false
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 HGMERGE specifies internal:other but is overruled by --tool=false
 
   $ HGMERGE=internal:other ; export HGMERGE
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --tool=false
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
   $ unset HGMERGE # make sure HGMERGE doesn't interfere with remaining tests
 
 update is a merge ...
 
 (this also tests that files reverted with '--rev REV' are treated as
 "modified", even if none of mode, size and timestamp of them isn't
 changed on the filesystem (see also issue4583))
 
   $ cat >> $HGRCPATH <<EOF
   > [fakedirstatewritetime]
   > # emulate invoking dirstate.write() via repo.status()
   > # at 2000-01-01 00:00
   > fakenow = 200001010000
   > EOF
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg update -q 0
   $ f -s f
   f: size=17
   $ touch -t 200001010000 f
   $ hg debugrebuildstate
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > fakedirstatewritetime = $TESTDIR/fakedirstatewritetime.py
   > EOF
   $ hg revert -q -r 1 .
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > fakedirstatewritetime = !
   > EOF
   $ f -s f
   f: size=17
   $ touch -t 200001010000 f
   $ hg status f
   M f
   $ hg update -r 2
   merging f
   revision 1
   space
   revision 0
   space
   revision 2
   space
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 update should also have --tool
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg update -q 0
   $ f -s f
   f: size=17
   $ touch -t 200001010000 f
   $ hg debugrebuildstate
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > fakedirstatewritetime = $TESTDIR/fakedirstatewritetime.py
   > EOF
   $ hg revert -q -r 1 .
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > fakedirstatewritetime = !
   > EOF
   $ f -s f
   f: size=17
   $ touch -t 200001010000 f
   $ hg status f
   M f
   $ hg update -r 2 --tool false
   merging f
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
 Default is silent simplemerge:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 3
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   revision 3
   # hg stat
   M f
   # hg resolve --list
   R f
 
 .premerge=True is same:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 3 --config merge-tools.true.premerge=True
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   revision 3
   # hg stat
   M f
   # hg resolve --list
   R f
 
 .premerge=False executes merge-tool:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 3 --config merge-tools.true.premerge=False
   merging f
   revision 1
   space
   revision 0
   space
   revision 0
   space
   revision 3
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 premerge=keep keeps conflict markers in:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 4 --config merge-tools.true.premerge=keep
   merging f
   <<<<<<< working copy: ef83787e2614 - test: revision 1
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
   revision 0
   space
   revision 4
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   <<<<<<< working copy: ef83787e2614 - test: revision 1
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
   # hg stat
   M f
   # hg resolve --list
   R f
 
 premerge=keep-merge3 keeps conflict markers with base content:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 4 --config merge-tools.true.premerge=keep-merge3
   merging f
   <<<<<<< working copy: ef83787e2614 - test: revision 1
   revision 1
   space
   ||||||| base
   revision 0
   space
   =======
   revision 4
   >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
   revision 0
   space
   revision 4
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   <<<<<<< working copy: ef83787e2614 - test: revision 1
   revision 1
   space
   ||||||| base
   revision 0
   space
   =======
   revision 4
   >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
   # hg stat
   M f
   # hg resolve --list
   R f
 
 premerge=keep respects ui.mergemarkers=basic:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 4 --config merge-tools.true.premerge=keep --config ui.mergemarkers=basic
   merging f
   <<<<<<< working copy
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev
   revision 0
   space
   revision 4
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   <<<<<<< working copy
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev
   # hg stat
   M f
   # hg resolve --list
   R f
 
 premerge=keep ignores ui.mergemarkers=basic if true.mergemarkers=detailed:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 4 --config merge-tools.true.premerge=keep \
   >     --config ui.mergemarkers=basic \
   >     --config merge-tools.true.mergemarkers=detailed
   merging f
   <<<<<<< working copy: ef83787e2614 - test: revision 1
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
   revision 0
   space
   revision 4
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   <<<<<<< working copy: ef83787e2614 - test: revision 1
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
   # hg stat
   M f
   # hg resolve --list
   R f
 
 premerge=keep respects ui.mergemarkertemplate instead of
 true.mergemarkertemplate if true.mergemarkers=basic:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 4 --config merge-tools.true.premerge=keep \
   >    --config ui.mergemarkertemplate='uitmpl {rev}' \
   >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}'
   merging f
   <<<<<<< working copy: uitmpl 1
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev:    uitmpl 4
   revision 0
   space
   revision 4
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   <<<<<<< working copy: uitmpl 1
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev:    uitmpl 4
   # hg stat
   M f
   # hg resolve --list
   R f
 
 premerge=keep respects true.mergemarkertemplate instead of
 true.mergemarkertemplate if true.mergemarkers=detailed:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 4 --config merge-tools.true.premerge=keep \
   >    --config ui.mergemarkertemplate='uitmpl {rev}' \
   >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
   >    --config merge-tools.true.mergemarkers=detailed
   merging f
   <<<<<<< working copy: tooltmpl ef83787e2614
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev:    tooltmpl 81448d39c9a0
   revision 0
   space
   revision 4
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   <<<<<<< working copy: tooltmpl ef83787e2614
   revision 1
   space
   =======
   revision 4
   >>>>>>> merge rev:    tooltmpl 81448d39c9a0
   # hg stat
   M f
   # hg resolve --list
   R f
 
 Tool execution
 
 set tools.args explicit to include $base $local $other $output:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable=head --config merge-tools.true.args='$base $local $other $output' \
   >   | sed 's,==> .* <==,==> ... <==,g'
   merging f
   ==> ... <==
   revision 0
   space
   
   ==> ... <==
   revision 1
   space
   
   ==> ... <==
   revision 2
   space
   
   ==> ... <==
   revision 1
   space
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 Merge with "echo mergeresult > $local":
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable=echo --config merge-tools.true.args='mergeresult > $local'
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   mergeresult
   # hg stat
   M f
   # hg resolve --list
   R f
 
 - and $local is the file f:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable=echo --config merge-tools.true.args='mergeresult > f'
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   mergeresult
   # hg stat
   M f
   # hg resolve --list
   R f
 
 Merge with "echo mergeresult > $output" - the variable is a bit magic:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -r 2 --config merge-tools.true.executable=echo --config merge-tools.true.args='mergeresult > $output'
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ aftermerge
   # cat f
   mergeresult
   # hg stat
   M f
   # hg resolve --list
   R f
 
 Merge using tool with a path that must be quoted:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ cat <<EOF > 'my merge tool'
   > cat "\$1" "\$2" "\$3" > "\$4"
   > EOF
   $ hg --config merge-tools.true.executable='sh' \
   >    --config merge-tools.true.args='"./my merge tool" $base $local $other $output' \
   >    merge -r 2
   merging f
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ rm -f 'my merge tool'
   $ aftermerge
   # cat f
   revision 0
   space
   revision 1
   space
   revision 2
   space
   # hg stat
   M f
   # hg resolve --list
   R f
 
 Merge using a tool that supports labellocal, labelother, and labelbase, checking
 that they're quoted properly as well. This is using the default 'basic'
 mergemarkers even though ui.mergemarkers is 'detailed', so it's ignoring both
 mergemarkertemplate settings:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ cat <<EOF > printargs_merge_tool
   > while test \$# -gt 0; do echo arg: \"\$1\"; shift; done
   > EOF
   $ hg --config merge-tools.true.executable='sh' \
   >    --config merge-tools.true.args='./printargs_merge_tool ll:$labellocal lo: $labelother lb:$labelbase": "$base' \
   >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
   >    --config ui.mergemarkertemplate='uitmpl {rev}' \
   >    --config ui.mergemarkers=detailed \
   >    merge -r 2
   merging f
   arg: "ll:working copy"
   arg: "lo:"
   arg: "merge rev"
   arg: "lb:base: */f~base.*" (glob)
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ rm -f 'printargs_merge_tool'
 
 Same test with experimental.mergetempdirprefix set:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ cat <<EOF > printargs_merge_tool
   > while test \$# -gt 0; do echo arg: \"\$1\"; shift; done
   > EOF
   $ hg --config experimental.mergetempdirprefix=$TESTTMP/hgmerge. \
   >    --config merge-tools.true.executable='sh' \
   >    --config merge-tools.true.args='./printargs_merge_tool ll:$labellocal lo: $labelother lb:$labelbase": "$base' \
   >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
   >    --config ui.mergemarkertemplate='uitmpl {rev}' \
   >    --config ui.mergemarkers=detailed \
   >    merge -r 2
   merging f
   arg: "ll:working copy"
   arg: "lo:"
   arg: "merge rev"
   arg: "lb:base: */hgmerge.*/f~base" (glob)
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ rm -f 'printargs_merge_tool'
 
 Merge using a tool that supports labellocal, labelother, and labelbase, checking
 that they're quoted properly as well. This is using 'detailed' mergemarkers,
 even though ui.mergemarkers is 'basic', and using the tool's
 mergemarkertemplate:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ cat <<EOF > printargs_merge_tool
   > while test \$# -gt 0; do echo arg: \"\$1\"; shift; done
   > EOF
   $ hg --config merge-tools.true.executable='sh' \
   >    --config merge-tools.true.args='./printargs_merge_tool ll:$labellocal lo: $labelother lb:$labelbase": "$base' \
   >    --config merge-tools.true.mergemarkers=detailed \
   >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
   >    --config ui.mergemarkertemplate='uitmpl {rev}' \
   >    --config ui.mergemarkers=basic \
   >    merge -r 2
   merging f
   arg: "ll:working copy: tooltmpl ef83787e2614"
   arg: "lo:"
   arg: "merge rev: tooltmpl 0185f4e0cf02"
   arg: "lb:base: */f~base.*" (glob)
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ rm -f 'printargs_merge_tool'
 
 The merge tool still gets labellocal and labelother as 'basic' even when
 premerge=keep is used and has 'detailed' markers:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ cat <<EOF > mytool
   > echo labellocal: \"\$1\"
   > echo labelother: \"\$2\"
   > echo "output (arg)": \"\$3\"
   > echo "output (contents)":
   > cat "\$3"
   > EOF
   $ hg --config merge-tools.true.executable='sh' \
   >    --config merge-tools.true.args='mytool $labellocal $labelother $output' \
   >    --config merge-tools.true.premerge=keep \
   >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
   >    --config ui.mergemarkertemplate='uitmpl {rev}' \
   >    --config ui.mergemarkers=detailed \
   >    merge -r 2
   merging f
   labellocal: "working copy"
   labelother: "merge rev"
   output (arg): "$TESTTMP/repo/f"
   output (contents):
   <<<<<<< working copy: uitmpl 1
   revision 1
   =======
   revision 2
   >>>>>>> merge rev:    uitmpl 2
   space
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ rm -f 'mytool'
 
 premerge=keep uses the *tool's* mergemarkertemplate if tool's
 mergemarkers=detailed; labellocal and labelother also use the tool's template
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ cat <<EOF > mytool
   > echo labellocal: \"\$1\"
   > echo labelother: \"\$2\"
   > echo "output (arg)": \"\$3\"
   > echo "output (contents)":
   > cat "\$3"
   > EOF
   $ hg --config merge-tools.true.executable='sh' \
   >    --config merge-tools.true.args='mytool $labellocal $labelother $output' \
   >    --config merge-tools.true.premerge=keep \
   >    --config merge-tools.true.mergemarkers=detailed \
   >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
   >    --config ui.mergemarkertemplate='uitmpl {rev}' \
   >    --config ui.mergemarkers=detailed \
   >    merge -r 2
   merging f
   labellocal: "working copy: tooltmpl ef83787e2614"
   labelother: "merge rev: tooltmpl 0185f4e0cf02"
   output (arg): "$TESTTMP/repo/f"
   output (contents):
   <<<<<<< working copy: tooltmpl ef83787e2614
   revision 1
   =======
   revision 2
   >>>>>>> merge rev:    tooltmpl 0185f4e0cf02
   space
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ rm -f 'mytool'
 
 Issue3581: Merging a filename that needs to be quoted
 (This test doesn't work on Windows filesystems even on Linux, so check
 for Unix-like permission)
 
 #if unix-permissions
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ echo "revision 5" > '"; exit 1; echo "'
   $ hg commit -Am "revision 5"
   adding "; exit 1; echo "
   warning: filename contains '"', which is reserved on Windows: '"; exit 1; echo "'
   $ hg update -C 1 > /dev/null
   $ echo "revision 6" > '"; exit 1; echo "'
   $ hg commit -Am "revision 6"
   adding "; exit 1; echo "
   warning: filename contains '"', which is reserved on Windows: '"; exit 1; echo "'
   created new head
   $ hg merge --config merge-tools.true.executable="true" -r 5
   merging "; exit 1; echo "
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg update -C 1 > /dev/null
 #endif
 
 Merge post-processing
 
 cat is a bad merge-tool and doesn't change:
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
   # hg update -C 1
   $ hg merge -y -r 2 --config merge-tools.true.checkchanged=1
   merging f
   revision 1
   space
   revision 0
   space
   revision 2
   space
    output file f appears unchanged
   was merge successful (yn)? n
   merging f failed!
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ aftermerge
   # cat f
   revision 1
   space
   # hg stat
   M f
   ? f.orig
   # hg resolve --list
   U f
 
+missingbinary is a merge-tool that doesn't exist:
+
+  $ echo "missingbinary.executable=doesnotexist" >> .hg/hgrc
+  $ beforemerge
+  [merge-tools]
+  false.whatever=
+  true.priority=1
+  true.executable=cat
+  missingbinary.executable=doesnotexist
+  # hg update -C 1
+  $ hg merge -y -r 2 --config ui.merge=missingbinary
+  merging f
+  revision 1
+  space
+  revision 0
+  space
+  revision 2
+  space
+  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+
 #if symlink
 
 internal merge cannot handle symlinks and shouldn't try:
 
   $ hg update -q -C 1
   $ rm f
   $ ln -s symlink f
   $ hg commit -qm 'f is symlink'
   $ hg merge -r 2 --tool internal:merge
   merging f
   warning: internal :merge cannot merge symlinks for f
   warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
 
 #endif
 
 Verify naming of temporary files and that extension is preserved:
 
   $ hg update -q -C 1
   $ hg mv f f.txt
   $ hg ci -qm "f.txt"
   $ hg update -q -C 2
   $ hg merge -y -r tip --tool echo --config merge-tools.echo.args='$base $local $other $output'
   merging f and f.txt to f.txt
   */f~base.* */f~local.*.txt */f~other.*.txt $TESTTMP/repo/f.txt (glob)
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
 Verify naming of temporary files and that extension is preserved
 (experimental.mergetempdirprefix version):
 
   $ hg update -q -C 1
   $ hg mv f f.txt
   $ hg ci -qm "f.txt"
   $ hg update -q -C 2
   $ hg merge -y -r tip --tool echo \
   >    --config merge-tools.echo.args='$base $local $other $output' \
   >    --config experimental.mergetempdirprefix=$TESTTMP/hgmerge.
   merging f and f.txt to f.txt
   $TESTTMP/hgmerge.*/f~base $TESTTMP/hgmerge.*/f~local.txt $TESTTMP/hgmerge.*/f~other.txt $TESTTMP/repo/f.txt (glob)
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 
 Check that debugpicktool examines which merge tool is chosen for
 specified file as expected
 
   $ beforemerge
   [merge-tools]
   false.whatever=
   true.priority=1
   true.executable=cat
+  missingbinary.executable=doesnotexist
   # hg update -C 1
 
 (default behavior: checking files in the working parent context)
 
   $ hg manifest
   f
   $ hg debugpickmergetool
   f = true
 
 (-X/-I and file patterns limmit examination targets)
 
   $ hg debugpickmergetool -X f
   $ hg debugpickmergetool unknown
   unknown: no such file in rev ef83787e2614
 
 (--changedelete emulates merging change and delete)
 
   $ hg debugpickmergetool --changedelete
   f = :prompt
 
 (-r REV causes checking files in specified revision)
 
   $ hg manifest -r tip
   f.txt
   $ hg debugpickmergetool -r tip
   f.txt = true
 
 #if symlink
 
 (symlink causes chosing :prompt)
 
   $ hg debugpickmergetool -r 6d00b3726f6e
   f = :prompt
 
 #endif
 
 (--verbose shows some configurations)
 
   $ hg debugpickmergetool --tool foobar -v
   with --tool 'foobar'
   f = foobar
 
   $ HGMERGE=false hg debugpickmergetool -v
   with HGMERGE='false'
   f = false
 
   $ hg debugpickmergetool --config ui.merge=false -v
   with ui.merge='false'
   f = false
 
 (--debug shows errors detected intermediately)
 
   $ hg debugpickmergetool --config merge-patterns.f=true --config merge-tools.true.executable=nonexistentmergetool --debug f
   couldn't find merge tool true (for pattern f)
   couldn't find merge tool true
   f = false
 
   $ cd ..