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git-merge: add --ff and --no-ff options

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These new options can be used to control the policy for fast-forward
merges: --ff allows it (this is the default) while --no-ff will create
a merge commit.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Lars Hjemli 2007-09-24 00:51:45 +02:00 committed by Junio C Hamano
parent d08af0ad74
commit d66424c4ac
3 changed files with 45 additions and 6 deletions
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9
Documentation/merge-options.txt
View file

@ -27,6 +27,15 @@
Perform the merge and commit the result. This option can
be used to override --squash.
--no-ff::
Generate a merge commit even if the merge resolved as a
fast-forward.
--ff::
Do not generate a merge commit if the merge resolved as
a fast-forward, only update the branch pointer. This is
the default behavior of git-merge.
-s <strategy>, \--strategy=<strategy>::
Use the given merge strategy; can be supplied more than
once to specify them in the order they should be tried.

22
git-merge.sh
View file

@ -3,7 +3,7 @@
# Copyright (c) 2005 Junio C Hamano
#
USAGE='[-n] [--summary] [--[no-]commit] [--[no-]squash] [-s <strategy>] [-m=<merge-message>] <commit>+'
USAGE='[-n] [--summary] [--[no-]commit] [--[no-]squash] [--[no-]ff] [-s <strategy>] [-m=<merge-message>] <commit>+'
SUBDIRECTORY_OK=Yes
. git-sh-setup
@ -127,13 +127,17 @@ parse_option () {
--summary)
show_diffstat=t ;;
--sq|--squ|--squa|--squas|--squash)
squash=t no_commit=t ;;
allow_fast_forward=t squash=t no_commit=t ;;
--no-sq|--no-squ|--no-squa|--no-squas|--no-squash)
squash= no_commit= ;;
allow_fast_forward=t squash= no_commit= ;;
--c|--co|--com|--comm|--commi|--commit)
squash= no_commit= ;;
allow_fast_forward=t squash= no_commit= ;;
--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
squash= no_commit=t ;;
allow_fast_forward=t squash= no_commit=t ;;
--ff)
allow_fast_forward=t squash= no_commit= ;;
--no-ff)
allow_fast_forward=false squash= no_commit= ;;
-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
--strateg=*|--strategy=*|\
-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
@ -477,7 +481,13 @@ done
# auto resolved the merge cleanly.
if test '' != "$result_tree"
then
parents=$(git show-branch --independent "$head" "$@" | sed -e 's/^/-p /')
if test "$allow_fast_forward" = "t"
then
parents=$(git show-branch --independent "$head" "$@")
else
parents=$(git rev-parse "$head" "$@")
fi
parents=$(echo "$parents" | sed -e 's/^/-p /')
result_commit=$(printf '%s\n' "$merge_msg" | git commit-tree $result_tree $parents) || exit
finish "$result_commit" "Merge made by $wt_strategy."
dropsave

20
t/t7600-merge.sh
View file

@ -417,4 +417,24 @@ test_expect_success 'merge c1 with c2 (override --squash)' '
test_debug 'gitk --all'
test_expect_success 'merge c0 with c1 (no-ff)' '
git reset --hard c0 &&
test_tick &&
git merge --no-ff c1 &&
verify_merge file result.1 &&
verify_parents $c0 $c1
'
test_debug 'gitk --all'
test_expect_success 'merge c0 with c1 (ff overrides no-ff)' '
git reset --hard c0 &&
git config branch.master.mergeoptions "--no-ff" &&
git merge --ff c1 &&
verify_merge file result.1 &&
verify_head $c1
'
test_debug 'gitk --all'
test_done