Merge branch 'em/checkout-orphan'

* em/checkout-orphan:
  git checkout: create unparented branch by --orphan
This commit is contained in:
Junio C Hamano 2010-05-21 04:02:14 -07:00
Родитель 1be270cbdf 9db5ebf402
Коммит e2ab0227aa
3 изменённых файлов: 122 добавлений и 3 удалений

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@ -9,7 +9,7 @@ SYNOPSIS
--------
[verse]
'git checkout' [-q] [-f] [-m] [<branch>]
'git checkout' [-q] [-f] [-m] [-b <new_branch>] [<start_point>]
'git checkout' [-q] [-f] [-m] [[-b|--orphan] <new_branch>] [<start_point>]
'git checkout' [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] [--] <paths>...
'git checkout' --patch [<tree-ish>] [--] [<paths>...]
@ -90,6 +90,24 @@ explicitly give a name with '-b' in such a case.
Create the new branch's reflog; see linkgit:git-branch[1] for
details.
--orphan::
Create a new branch named <new_branch>, unparented to any other
branch. The new branch you switch to does not have any commit
and after the first one it will become the root of a new history
completely unconnected from all the other branches.
+
When you use "--orphan", the index and the working tree are kept intact.
This allows you to start a new history that records set of paths similar
to that of the start-point commit, which is useful when you want to keep
different branches for different audiences you are working to like when
you have an open source and commercial versions of a software, for example.
+
If you want to start a disconnected history that records set of paths
totally different from the original branch, you may want to first clear
the index and the working tree, by running "git rm -rf ." from the
top-level of the working tree, before preparing your files (by copying
from elsewhere, extracting a tarball, etc.) in the working tree.
-m::
--merge::
When switching branches,

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@ -33,6 +33,7 @@ struct checkout_opts {
int writeout_error;
const char *new_branch;
const char *new_orphan_branch;
int new_branch_log;
enum branch_track track;
};
@ -492,8 +493,9 @@ static void update_refs_for_switch(struct checkout_opts *opts,
struct strbuf msg = STRBUF_INIT;
const char *old_desc;
if (opts->new_branch) {
create_branch(old->name, opts->new_branch, new->name, 0,
opts->new_branch_log, opts->track);
if (!opts->new_orphan_branch)
create_branch(old->name, opts->new_branch, new->name, 0,
opts->new_branch_log, opts->track);
new->name = opts->new_branch;
setup_branch_path(new);
}
@ -633,6 +635,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
OPT_BOOLEAN('l', NULL, &opts.new_branch_log, "log for new branch"),
OPT_SET_INT('t', "track", &opts.track, "track",
BRANCH_TRACK_EXPLICIT),
OPT_STRING(0, "orphan", &opts.new_orphan_branch, "new branch", "new unparented branch"),
OPT_SET_INT('2', "ours", &opts.writeout_stage, "stage",
2),
OPT_SET_INT('3', "theirs", &opts.writeout_stage, "stage",
@ -678,6 +681,14 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
opts.new_branch = argv0 + 1;
}
if (opts.new_orphan_branch) {
if (opts.new_branch)
die("--orphan and -b are mutually exclusive");
if (opts.track > 0 || opts.new_branch_log)
die("--orphan cannot be used with -t or -l");
opts.new_branch = opts.new_orphan_branch;
}
if (conflict_style) {
opts.merge = 1; /* implied */
git_xmerge_config("merge.conflictstyle", conflict_style, NULL);

90
t/t2017-checkout-orphan.sh Executable file
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@ -0,0 +1,90 @@
#!/bin/sh
#
# Copyright (c) 2010 Erick Mattos
#
test_description='git checkout --orphan
Main Tests for --orphan functionality.'
. ./test-lib.sh
TEST_FILE=foo
test_expect_success 'Setup' '
echo "Initial" >"$TEST_FILE" &&
git add "$TEST_FILE" &&
git commit -m "First Commit"
test_tick &&
echo "State 1" >>"$TEST_FILE" &&
git add "$TEST_FILE" &&
test_tick &&
git commit -m "Second Commit"
'
test_expect_success '--orphan creates a new orphan branch from HEAD' '
git checkout --orphan alpha &&
test_must_fail git rev-parse --verify HEAD &&
test "refs/heads/alpha" = "$(git symbolic-ref HEAD)" &&
test_tick &&
git commit -m "Third Commit" &&
test_must_fail git rev-parse --verify HEAD^ &&
git diff-tree --quiet master alpha
'
test_expect_success '--orphan creates a new orphan branch from <start_point>' '
git checkout master &&
git checkout --orphan beta master^ &&
test_must_fail git rev-parse --verify HEAD &&
test "refs/heads/beta" = "$(git symbolic-ref HEAD)" &&
test_tick &&
git commit -m "Fourth Commit" &&
test_must_fail git rev-parse --verify HEAD^ &&
git diff-tree --quiet master^ beta
'
test_expect_success '--orphan must be rejected with -b' '
git checkout master &&
test_must_fail git checkout --orphan new -b newer &&
test refs/heads/master = "$(git symbolic-ref HEAD)"
'
test_expect_success '--orphan is rejected with an existing name' '
git checkout master &&
test_must_fail git checkout --orphan master &&
test refs/heads/master = "$(git symbolic-ref HEAD)"
'
test_expect_success '--orphan refuses to switch if a merge is needed' '
git checkout master &&
git reset --hard &&
echo local >>"$TEST_FILE" &&
cat "$TEST_FILE" >"$TEST_FILE.saved" &&
test_must_fail git checkout --orphan gamma master^ &&
test refs/heads/master = "$(git symbolic-ref HEAD)" &&
test_cmp "$TEST_FILE" "$TEST_FILE.saved" &&
git diff-index --quiet --cached HEAD &&
git reset --hard
'
test_expect_success '--orphan does not mix well with -t' '
git checkout master &&
test_must_fail git checkout -t master --orphan gamma &&
test refs/heads/master = "$(git symbolic-ref HEAD)"
'
test_expect_success '--orphan ignores branch.autosetupmerge' '
git checkout -f master &&
git config branch.autosetupmerge always &&
git checkout --orphan delta &&
test -z "$(git config branch.delta.merge)" &&
test refs/heads/delta = "$(git symbolic-ref HEAD)" &&
test_must_fail git rev-parse --verify HEAD^
'
test_expect_success '--orphan does not mix well with -l' '
git checkout -f master &&
test_must_fail git checkout -l --orphan gamma
'
test_done