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git-difftool--helper.sh: exit upon initialize_merge_tool errors

Since the introduction of 'initialize_merge_tool' in de8dafbada
(mergetool: break setup_tool out into separate initialization function,
2021-02-09), any errors from this function are ignored in
git-difftool--helper.sh::launch_merge_tool, which is not the case for
its call in git-mergetool.sh::merge_file.

Despite the in-code comment, initialize_merge_tool (via its call to
setup_tool) does different checks than run_merge_tool, so it makes sense
to abort early if it encounters errors. Add exit calls if
initialize_merge_tool fails.

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

authored by

Philippe Blain and committed by
Junio C Hamano
dbaece35 acca46d1

+2 -6
+2 -6
git-difftool--helper.sh
··· 61 61 export BASE 62 62 eval $GIT_DIFFTOOL_EXTCMD '"$LOCAL"' '"$REMOTE"' 63 63 else 64 - initialize_merge_tool "$merge_tool" 65 - # ignore the error from the above --- run_merge_tool 66 - # will diagnose unusable tool by itself 64 + initialize_merge_tool "$merge_tool" || exit 1 67 65 run_merge_tool "$merge_tool" 68 66 fi 69 67 } ··· 87 85 then 88 86 LOCAL="$1" 89 87 REMOTE="$2" 90 - initialize_merge_tool "$merge_tool" 91 - # ignore the error from the above --- run_merge_tool 92 - # will diagnose unusable tool by itself 88 + initialize_merge_tool "$merge_tool" || exit 1 93 89 run_merge_tool "$merge_tool" false 94 90 95 91 status=$?