tests/test-merge-tools

patchbomb: fix help to reflect actual operation

In the body, the description is shown in its entirety,
unstripped from what was already in the subject.

#!/bin/sh

# test merge-tools configuration - mostly exercising filemerge.py

unset HGMERGE # make sure HGMERGE doesn't interfere with the test

hg init

echo "# revision 0"
echo "revision 0" > f
echo "space" >> f
hg commit -Am "revision 0" -d "1000000 0"

echo "# revision 1"
echo "revision 1" > f
echo "space" >> f
hg commit -Am "revision 1" -d "1000000 0"

hg update 0 > /dev/null
echo "# revision 2"
echo "revision 2" > f
echo "space" >> f
hg commit -Am "revision 2" -d "1000000 0"

hg update 0 > /dev/null
echo "# revision 3 - simple to merge"
echo "revision 3" >> f
hg commit -Am "revision 3" -d "1000000 0"


echo "[merge-tools]" > .hg/hgrc
echo

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
  rm -f f.orig
  echo
}

domerge() {
  beforemerge
  echo "# hg merge $*"
  hg merge $*
  aftermerge
}

echo
echo Tool selection
echo

echo "# default is internal merge:"
beforemerge
echo "# hg merge -r 2"
PATH=$BINDIR hg merge -r 2
aftermerge

echo "# simplest hgrc using false for merge:"
echo "false.whatever=" >> .hg/hgrc
domerge -r 2

echo "# true with higher .priority gets precedence:"
echo "true.priority=1" >> .hg/hgrc
domerge -r 2

echo "# unless lowered on command line:"
domerge -r 2 --config merge-tools.true.priority=-7

echo "# or false set higher on command line:"
domerge -r 2 --config merge-tools.false.priority=117

echo "# or true.executable not found in PATH:"
domerge -r 2 --config merge-tools.true.executable=nonexistingmergetool

echo "# or true.executable with bogus path:"
domerge -r 2 --config merge-tools.true.executable=/bin/nonexistingmergetool

echo "# but true.executable set to cat found in PATH works:"
echo "true.executable=cat" >> .hg/hgrc
domerge -r 2

echo "# and true.executable set to cat with path works:"
domerge -r 2 --config merge-tools.true.executable=/bin/cat


echo
echo Tool selection and merge-patterns
echo

echo "# merge-patterns specifies new tool false:"
domerge -r 2 --config merge-patterns.f=false

echo "# merge-patterns specifies executable not found in PATH and gets warning:"
domerge -r 2 --config merge-patterns.f=true --config merge-tools.true.executable=nonexistingmergetool

echo "# merge-patterns specifies executable with bogus path and gets warning:"
domerge -r 2 --config merge-patterns.f=true --config merge-tools.true.executable=/bin/nonexistingmergetool

echo
echo ui.merge overrules priority
echo

echo "# ui.merge specifies false:"
domerge -r 2 --config ui.merge=false

echo "# ui.merge specifies internal:fail:"
domerge -r 2 --config ui.merge=internal:fail

echo "# ui.merge specifies internal:local:"
domerge -r 2 --config ui.merge=internal:local

echo "# ui.merge specifies internal:other:"
domerge -r 2 --config ui.merge=internal:other

echo "# ui.merge specifies internal:other but is overruled by pattern for false:"
domerge -r 2 --config ui.merge=internal:other --config merge-patterns.f=false

echo
echo Premerge
echo

echo "# Default is silent simplemerge:"
domerge -r 3

echo "# .premerge=True is same:"
domerge -r 3 --config merge-tools.true.premerge=True

echo "# .premerge=False executes merge-tool:"
domerge -r 3 --config merge-tools.true.premerge=False


echo
echo Tool execution
echo

echo '# set tools.args explicit to include $base $local $other $output:' # default '$local $base $other'
beforemerge
hg merge -r 2 --config merge-tools.true.executable=head --config merge-tools.true.args='$base $local $other $output' \
  | sed 's,==> .* <==,==> ... <==,g'
aftermerge

echo '# Merge with "echo mergeresult > $local":'
beforemerge
hg merge -r 2 --config merge-tools.true.executable=echo --config merge-tools.true.args='mergeresult > $local'
aftermerge

echo '# - and $local is the file f:'
beforemerge
hg merge -r 2 --config merge-tools.true.executable=echo --config merge-tools.true.args='mergeresult > f'
aftermerge

echo '# Merge with "echo mergeresult > $output" - the variable is a bit magic:'
beforemerge
hg merge -r 2 --config merge-tools.true.executable=echo --config merge-tools.true.args='mergeresult > $output'
aftermerge


echo
echo Merge post-processing
echo

echo "# cat is a bad merge-tool and doesn't change:"
domerge -r 2 --config merge-tools.true.checkchanged=1