git/t/t5510-fetch.sh
Michael Haggerty 0838bf47b3 fetch --prune: prune only based on explicit refspecs
The old behavior of "fetch --prune" was to prune whatever was being
fetched.  In particular, "fetch --prune --tags" caused tags not only
to be fetched, but also to be pruned.  This is inappropriate because
there is only one tags namespace that is shared among the local
repository and all remotes.  Therefore, if the user defines a local
tag and then runs "git fetch --prune --tags", then the local tag is
deleted.  Moreover, "--prune" and "--tags" can also be configured via
fetch.prune / remote.<name>.prune and remote.<name>.tagopt, making it
even less obvious that an invocation of "git fetch" could result in
tag lossage.

Since the command "git remote update" invokes "git fetch", it had the
same problem.

The command "git remote prune", on the other hand, disregarded the
setting of remote.<name>.tagopt, and so its behavior was inconsistent
with that of the other commands.

So the old behavior made it too easy to lose tags.  To fix this
problem, change "fetch --prune" to prune references based only on
refspecs specified explicitly by the user, either on the command line
or via remote.<name>.fetch.  Thus, tags are no longer made subject to
pruning by the --tags option or the remote.<name>.tagopt setting.

However, tags *are* still subject to pruning if they are fetched as
part of a refspec, and that is good.  For example:

* On the command line,

      git fetch --prune 'refs/tags/*:refs/tags/*'

  causes tags, and only tags, to be fetched and pruned, and is
  therefore a simple way for the user to get the equivalent of the old
  behavior of "--prune --tag".

* For a remote that was configured with the "--mirror" option, the
  configuration is set to include

      [remote "name"]
              fetch = +refs/*:refs/*

  , which causes tags to be subject to pruning along with all other
  references.  This is the behavior that will typically be desired for
  a mirror.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-10-30 14:16:37 -07:00

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#!/bin/sh
# Copyright (c) 2006, Junio C Hamano.
test_description='Per branch config variables affects "git fetch".
'
. ./test-lib.sh
D=`pwd`
test_bundle_object_count () {
git verify-pack -v "$1" >verify.out &&
test "$2" = $(grep '^[0-9a-f]\{40\} ' verify.out | wc -l)
}
convert_bundle_to_pack () {
while read x && test -n "$x"
do
:;
done
cat
}
test_expect_success setup '
echo >file original &&
git add file &&
git commit -a -m original'
test_expect_success "clone and setup child repos" '
git clone . one &&
(
cd one &&
echo >file updated by one &&
git commit -a -m "updated by one"
) &&
git clone . two &&
(
cd two &&
git config branch.master.remote one &&
git config remote.one.url ../one/.git/ &&
git config remote.one.fetch refs/heads/master:refs/heads/one
) &&
git clone . three &&
(
cd three &&
git config branch.master.remote two &&
git config branch.master.merge refs/heads/one &&
mkdir -p .git/remotes &&
{
echo "URL: ../two/.git/"
echo "Pull: refs/heads/master:refs/heads/two"
echo "Pull: refs/heads/one:refs/heads/one"
} >.git/remotes/two
) &&
git clone . bundle &&
git clone . seven
'
test_expect_success "fetch test" '
cd "$D" &&
echo >file updated by origin &&
git commit -a -m "updated by origin" &&
cd two &&
git fetch &&
test -f .git/refs/heads/one &&
mine=`git rev-parse refs/heads/one` &&
his=`cd ../one && git rev-parse refs/heads/master` &&
test "z$mine" = "z$his"
'
test_expect_success "fetch test for-merge" '
cd "$D" &&
cd three &&
git fetch &&
test -f .git/refs/heads/two &&
test -f .git/refs/heads/one &&
master_in_two=`cd ../two && git rev-parse master` &&
one_in_two=`cd ../two && git rev-parse one` &&
{
echo "$one_in_two "
echo "$master_in_two not-for-merge"
} >expected &&
cut -f -2 .git/FETCH_HEAD >actual &&
test_cmp expected actual'
test_expect_success 'fetch --prune on its own works as expected' '
cd "$D" &&
git clone . prune &&
cd prune &&
git update-ref refs/remotes/origin/extrabranch master &&
git fetch --prune origin &&
test_must_fail git rev-parse origin/extrabranch
'
test_expect_success 'fetch --prune with a branch name keeps branches' '
cd "$D" &&
git clone . prune-branch &&
cd prune-branch &&
git update-ref refs/remotes/origin/extrabranch master &&
git fetch --prune origin master &&
git rev-parse origin/extrabranch
'
test_expect_success 'fetch --prune with a namespace keeps other namespaces' '
cd "$D" &&
git clone . prune-namespace &&
cd prune-namespace &&
git fetch --prune origin refs/heads/a/*:refs/remotes/origin/a/* &&
git rev-parse origin/master
'
test_expect_success 'fetch --prune --tags prunes branches but not tags' '
cd "$D" &&
git clone . prune-tags &&
cd prune-tags &&
git tag sometag master &&
# Create what looks like a remote-tracking branch from an earlier
# fetch that has since been deleted from the remote:
git update-ref refs/remotes/origin/fake-remote master &&
git fetch --prune --tags origin &&
git rev-parse origin/master &&
test_must_fail git rev-parse origin/fake-remote &&
git rev-parse sometag
'
test_expect_success 'fetch --prune --tags with branch does not prune other things' '
cd "$D" &&
git clone . prune-tags-branch &&
cd prune-tags-branch &&
git tag sometag master &&
git update-ref refs/remotes/origin/extrabranch master &&
git fetch --prune --tags origin master &&
git rev-parse origin/extrabranch &&
git rev-parse sometag
'
test_expect_success 'fetch --prune --tags with refspec prunes based on refspec' '
cd "$D" &&
git clone . prune-tags-refspec &&
cd prune-tags-refspec &&
git tag sometag master &&
git update-ref refs/remotes/origin/foo/otherbranch master &&
git update-ref refs/remotes/origin/extrabranch master &&
git fetch --prune --tags origin refs/heads/foo/*:refs/remotes/origin/foo/* &&
test_must_fail git rev-parse refs/remotes/origin/foo/otherbranch &&
git rev-parse origin/extrabranch &&
git rev-parse sometag
'
test_expect_success 'fetch tags when there is no tags' '
cd "$D" &&
mkdir notags &&
cd notags &&
git init &&
git fetch -t ..
'
test_expect_success 'fetch following tags' '
cd "$D" &&
git tag -a -m 'annotated' anno HEAD &&
git tag light HEAD &&
mkdir four &&
cd four &&
git init &&
git fetch .. :track &&
git show-ref --verify refs/tags/anno &&
git show-ref --verify refs/tags/light
'
test_expect_success 'fetch uses remote ref names to describe new refs' '
cd "$D" &&
git init descriptive &&
(
cd descriptive &&
git config remote.o.url .. &&
git config remote.o.fetch "refs/heads/*:refs/crazyheads/*" &&
git config --add remote.o.fetch "refs/others/*:refs/heads/*" &&
git fetch o
) &&
git tag -a -m "Descriptive tag" descriptive-tag &&
git branch descriptive-branch &&
git checkout descriptive-branch &&
echo "Nuts" >crazy &&
git add crazy &&
git commit -a -m "descriptive commit" &&
git update-ref refs/others/crazy HEAD &&
(
cd descriptive &&
git fetch o 2>actual &&
grep " -> refs/crazyheads/descriptive-branch$" actual |
test_i18ngrep "new branch" &&
grep " -> descriptive-tag$" actual |
test_i18ngrep "new tag" &&
grep " -> crazy$" actual |
test_i18ngrep "new ref"
) &&
git checkout master
'
test_expect_success 'fetch must not resolve short tag name' '
cd "$D" &&
mkdir five &&
cd five &&
git init &&
test_must_fail git fetch .. anno:five
'
test_expect_success 'fetch can now resolve short remote name' '
cd "$D" &&
git update-ref refs/remotes/six/HEAD HEAD &&
mkdir six &&
cd six &&
git init &&
git fetch .. six:six
'
test_expect_success 'create bundle 1' '
cd "$D" &&
echo >file updated again by origin &&
git commit -a -m "tip" &&
git bundle create bundle1 master^..master
'
test_expect_success 'header of bundle looks right' '
head -n 1 "$D"/bundle1 | grep "^#" &&
head -n 2 "$D"/bundle1 | grep "^-[0-9a-f]\{40\} " &&
head -n 3 "$D"/bundle1 | grep "^[0-9a-f]\{40\} " &&
head -n 4 "$D"/bundle1 | grep "^$"
'
test_expect_success 'create bundle 2' '
cd "$D" &&
git bundle create bundle2 master~2..master
'
test_expect_success 'unbundle 1' '
cd "$D/bundle" &&
git checkout -b some-branch &&
test_must_fail git fetch "$D/bundle1" master:master
'
test_expect_success 'bundle 1 has only 3 files ' '
cd "$D" &&
convert_bundle_to_pack <bundle1 >bundle.pack &&
git index-pack bundle.pack &&
test_bundle_object_count bundle.pack 3
'
test_expect_success 'unbundle 2' '
cd "$D/bundle" &&
git fetch ../bundle2 master:master &&
test "tip" = "$(git log -1 --pretty=oneline master | cut -b42-)"
'
test_expect_success 'bundle does not prerequisite objects' '
cd "$D" &&
touch file2 &&
git add file2 &&
git commit -m add.file2 file2 &&
git bundle create bundle3 -1 HEAD &&
convert_bundle_to_pack <bundle3 >bundle.pack &&
git index-pack bundle.pack &&
test_bundle_object_count bundle.pack 3
'
test_expect_success 'bundle should be able to create a full history' '
cd "$D" &&
git tag -a -m '1.0' v1.0 master &&
git bundle create bundle4 v1.0
'
! rsync --help > /dev/null 2> /dev/null &&
say 'Skipping rsync tests because rsync was not found' || {
test_expect_success 'fetch via rsync' '
git pack-refs &&
mkdir rsynced &&
(cd rsynced &&
git init --bare &&
git fetch "rsync:$(pwd)/../.git" master:refs/heads/master &&
git gc --prune &&
test $(git rev-parse master) = $(cd .. && git rev-parse master) &&
git fsck --full)
'
test_expect_success 'push via rsync' '
mkdir rsynced2 &&
(cd rsynced2 &&
git init) &&
(cd rsynced &&
git push "rsync:$(pwd)/../rsynced2/.git" master) &&
(cd rsynced2 &&
git gc --prune &&
test $(git rev-parse master) = $(cd .. && git rev-parse master) &&
git fsck --full)
'
test_expect_success 'push via rsync' '
mkdir rsynced3 &&
(cd rsynced3 &&
git init) &&
git push --all "rsync:$(pwd)/rsynced3/.git" &&
(cd rsynced3 &&
test $(git rev-parse master) = $(cd .. && git rev-parse master) &&
git fsck --full)
'
}
test_expect_success 'fetch with a non-applying branch.<name>.merge' '
git config branch.master.remote yeti &&
git config branch.master.merge refs/heads/bigfoot &&
git config remote.blub.url one &&
git config remote.blub.fetch "refs/heads/*:refs/remotes/one/*" &&
git fetch blub
'
# URL supplied to fetch does not match the url of the configured branch's remote
test_expect_success 'fetch from GIT URL with a non-applying branch.<name>.merge [1]' '
one_head=$(cd one && git rev-parse HEAD) &&
this_head=$(git rev-parse HEAD) &&
git update-ref -d FETCH_HEAD &&
git fetch one &&
test $one_head = "$(git rev-parse --verify FETCH_HEAD)" &&
test $this_head = "$(git rev-parse --verify HEAD)"
'
# URL supplied to fetch matches the url of the configured branch's remote and
# the merge spec matches the branch the remote HEAD points to
test_expect_success 'fetch from GIT URL with a non-applying branch.<name>.merge [2]' '
one_ref=$(cd one && git symbolic-ref HEAD) &&
git config branch.master.remote blub &&
git config branch.master.merge "$one_ref" &&
git update-ref -d FETCH_HEAD &&
git fetch one &&
test $one_head = "$(git rev-parse --verify FETCH_HEAD)" &&
test $this_head = "$(git rev-parse --verify HEAD)"
'
# URL supplied to fetch matches the url of the configured branch's remote, but
# the merge spec does not match the branch the remote HEAD points to
test_expect_success 'fetch from GIT URL with a non-applying branch.<name>.merge [3]' '
git config branch.master.merge "${one_ref}_not" &&
git update-ref -d FETCH_HEAD &&
git fetch one &&
test $one_head = "$(git rev-parse --verify FETCH_HEAD)" &&
test $this_head = "$(git rev-parse --verify HEAD)"
'
# the strange name is: a\!'b
test_expect_success 'quoting of a strangely named repo' '
test_must_fail git fetch "a\\!'\''b" > result 2>&1 &&
cat result &&
grep "fatal: '\''a\\\\!'\''b'\''" result
'
test_expect_success 'bundle should record HEAD correctly' '
cd "$D" &&
git bundle create bundle5 HEAD master &&
git bundle list-heads bundle5 >actual &&
for h in HEAD refs/heads/master
do
echo "$(git rev-parse --verify $h) $h"
done >expect &&
test_cmp expect actual
'
test_expect_success 'mark initial state of origin/master' '
(
cd three &&
git tag base-origin-master refs/remotes/origin/master
)
'
test_expect_success 'explicit fetch should update tracking' '
cd "$D" &&
git branch -f side &&
(
cd three &&
git update-ref refs/remotes/origin/master base-origin-master &&
o=$(git rev-parse --verify refs/remotes/origin/master) &&
git fetch origin master &&
n=$(git rev-parse --verify refs/remotes/origin/master) &&
test "$o" != "$n" &&
test_must_fail git rev-parse --verify refs/remotes/origin/side
)
'
test_expect_success 'explicit pull should update tracking' '
cd "$D" &&
git branch -f side &&
(
cd three &&
git update-ref refs/remotes/origin/master base-origin-master &&
o=$(git rev-parse --verify refs/remotes/origin/master) &&
git pull origin master &&
n=$(git rev-parse --verify refs/remotes/origin/master) &&
test "$o" != "$n" &&
test_must_fail git rev-parse --verify refs/remotes/origin/side
)
'
test_expect_success 'configured fetch updates tracking' '
cd "$D" &&
git branch -f side &&
(
cd three &&
git update-ref refs/remotes/origin/master base-origin-master &&
o=$(git rev-parse --verify refs/remotes/origin/master) &&
git fetch origin &&
n=$(git rev-parse --verify refs/remotes/origin/master) &&
test "$o" != "$n" &&
git rev-parse --verify refs/remotes/origin/side
)
'
test_expect_success 'non-matching refspecs do not confuse tracking update' '
cd "$D" &&
git update-ref refs/odd/location HEAD &&
(
cd three &&
git update-ref refs/remotes/origin/master base-origin-master &&
git config --add remote.origin.fetch \
refs/odd/location:refs/remotes/origin/odd &&
o=$(git rev-parse --verify refs/remotes/origin/master) &&
git fetch origin master &&
n=$(git rev-parse --verify refs/remotes/origin/master) &&
test "$o" != "$n" &&
test_must_fail git rev-parse --verify refs/remotes/origin/odd
)
'
test_expect_success 'pushing nonexistent branch by mistake should not segv' '
cd "$D" &&
test_must_fail git push seven no:no
'
test_expect_success 'auto tag following fetches minimum' '
cd "$D" &&
git clone .git follow &&
git checkout HEAD^0 &&
(
for i in 1 2 3 4 5 6 7
do
echo $i >>file &&
git commit -m $i -a &&
git tag -a -m $i excess-$i || exit 1
done
) &&
git checkout master &&
(
cd follow &&
git fetch
)
'
test_expect_success 'refuse to fetch into the current branch' '
test_must_fail git fetch . side:master
'
test_expect_success 'fetch into the current branch with --update-head-ok' '
git fetch --update-head-ok . side:master
'
test_expect_success 'fetch --dry-run' '
rm -f .git/FETCH_HEAD &&
git fetch --dry-run . &&
! test -f .git/FETCH_HEAD
'
test_expect_success "should be able to fetch with duplicate refspecs" '
mkdir dups &&
(
cd dups &&
git init &&
git config branch.master.remote three &&
git config remote.three.url ../three/.git &&
git config remote.three.fetch +refs/heads/*:refs/remotes/origin/* &&
git config --add remote.three.fetch +refs/heads/*:refs/remotes/origin/* &&
git fetch three
)
'
# configured prune tests
set_config_tristate () {
# var=$1 val=$2
case "$2" in
unset) test_unconfig "$1" ;;
*) git config "$1" "$2" ;;
esac
}
test_configured_prune () {
fetch_prune=$1 remote_origin_prune=$2 cmdline=$3 expected=$4
test_expect_success "prune fetch.prune=$1 remote.origin.prune=$2${3:+ $3}; $4" '
# make sure a newbranch is there in . and also in one
git branch -f newbranch &&
(
cd one &&
test_unconfig fetch.prune &&
test_unconfig remote.origin.prune &&
git fetch &&
git rev-parse --verify refs/remotes/origin/newbranch
)
# now remove it
git branch -d newbranch &&
# then test
(
cd one &&
set_config_tristate fetch.prune $fetch_prune &&
set_config_tristate remote.origin.prune $remote_origin_prune &&
git fetch $cmdline &&
case "$expected" in
pruned)
test_must_fail git rev-parse --verify refs/remotes/origin/newbranch
;;
kept)
git rev-parse --verify refs/remotes/origin/newbranch
;;
esac
)
'
}
test_configured_prune unset unset "" kept
test_configured_prune unset unset "--no-prune" kept
test_configured_prune unset unset "--prune" pruned
test_configured_prune false unset "" kept
test_configured_prune false unset "--no-prune" kept
test_configured_prune false unset "--prune" pruned
test_configured_prune true unset "" pruned
test_configured_prune true unset "--prune" pruned
test_configured_prune true unset "--no-prune" kept
test_configured_prune unset false "" kept
test_configured_prune unset false "--no-prune" kept
test_configured_prune unset false "--prune" pruned
test_configured_prune false false "" kept
test_configured_prune false false "--no-prune" kept
test_configured_prune false false "--prune" pruned
test_configured_prune true false "" kept
test_configured_prune true false "--prune" pruned
test_configured_prune true false "--no-prune" kept
test_configured_prune unset true "" pruned
test_configured_prune unset true "--no-prune" kept
test_configured_prune unset true "--prune" pruned
test_configured_prune false true "" pruned
test_configured_prune false true "--no-prune" kept
test_configured_prune false true "--prune" pruned
test_configured_prune true true "" pruned
test_configured_prune true true "--prune" pruned
test_configured_prune true true "--no-prune" kept
test_expect_success 'all boundary commits are excluded' '
test_commit base &&
test_commit oneside &&
git checkout HEAD^ &&
test_commit otherside &&
git checkout master &&
test_tick &&
git merge otherside &&
ad=$(git log --no-walk --format=%ad HEAD) &&
git bundle create twoside-boundary.bdl master --since="$ad" &&
convert_bundle_to_pack <twoside-boundary.bdl >twoside-boundary.pack &&
pack=$(git index-pack --fix-thin --stdin <twoside-boundary.pack) &&
test_bundle_object_count .git/objects/pack/pack-${pack##pack }.pack 3
'
test_done