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mergetool--lib: don't call "exit" in setup_tool

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This will make it easier to use setup_tool in places where we expect
that the selected tool will not support the current mode.

We need to introduce a new return code for setup_tool to differentiate
between the case of "the selected tool is invalid" and "the selected
tool is not a built-in" since we must call setup_tool when a custom
'merge.<tool>.path' is configured for a built-in tool but avoid failing
when the configured tool is not a built-in.

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
John Keeping 2013-01-26 16:40:06 -08:00 committed by Junio C Hamano
parent 88d3406ad7
commit 62957bea0c
1 changed files with 20 additions and 3 deletions
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23
git-mergetool--lib.sh
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@ -58,7 +58,11 @@ setup_tool () {
. "$mergetools/defaults"
if ! test -f "$mergetools/$tool"
then
return 1
# Use a special return code for this case since we want to
# source "defaults" even when an explicit tool path is
# configured since the user can use that to override the
# default path in the scriptlet.
return 2
fi
# Load the redefined functions
@ -67,11 +71,11 @@ setup_tool () {
if merge_mode && ! can_merge
then
echo "error: '$tool' can not be used to resolve merges" >&2
exit 1
return 1
elif diff_mode && ! can_diff
then
echo "error: '$tool' can only be used to resolve merges" >&2
exit 1
return 1
fi
return 0
}
@ -101,6 +105,19 @@ run_merge_tool () {
# Bring tool-specific functions into scope
setup_tool "$1"
exitcode=$?
case $exitcode in
0)
:
;;
2)
# The configured tool is not a built-in tool.
test -n "$merge_tool_path" || return 1
;;
*)
return $exitcode
;;
esac
if merge_mode
then