mirror of
https://github.com/git/git.git
synced 2024-10-31 14:27:54 +01:00
e379fdf34f
While it makes sense to allow merging unrelated histories of two projects that started independently into one, in the way "gitk" was merged to "git" itself aka "the coolest merge ever", such a merge is still an unusual event. Worse, if somebody creates an independent history by starting from a tarball of an established project and sends a pull request to the original project, "git merge" however happily creates such a merge without any sign of something unusual is happening. Teach "git merge" to refuse to create such a merge by default, unless the user passes a new "--allow-unrelated-histories" option to tell it that the user is aware that two unrelated projects are merged. Because such a "two project merge" is a rare event, a configuration option to always allow such a merge is not added. We could add the same option to "git pull" and have it passed through to underlying "git merge". I do not have a fundamental opposition against such a feature, but this commit does not do so and instead leaves it as low-hanging fruit for others, because such a "two project merge" would be done after fetching the other project into some location in the working tree of an existing project and making sure how well they fit together, it is sufficient to allow a local merge without such an option pass-through from "git pull" to "git merge". Many tests that are updated by this patch does the pass-through manually by turning: git pull something into its equivalent: git fetch something && git merge --allow-unrelated-histories FETCH_HEAD If somebody is inclined to add such an option, updated tests in this change need to be adjusted back to: git pull --allow-unrelated-histories something Signed-off-by: Junio C Hamano <gitster@pobox.com>
642 lines
14 KiB
Bash
Executable file
642 lines
14 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2005 Johannes Schindelin
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#
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test_description='Testing multi_ack pack fetching'
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. ./test-lib.sh
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# Test fetch-pack/upload-pack pair.
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# Some convenience functions
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add () {
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name=$1 &&
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text="$@" &&
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branch=`echo $name | sed -e 's/^\(.\).*$/\1/'` &&
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parents="" &&
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shift &&
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while test $1; do
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parents="$parents -p $1" &&
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shift
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done &&
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echo "$text" > test.txt &&
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git update-index --add test.txt &&
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tree=$(git write-tree) &&
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# make sure timestamps are in correct order
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test_tick &&
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commit=$(echo "$text" | git commit-tree $tree $parents) &&
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eval "$name=$commit; export $name" &&
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echo $commit > .git/refs/heads/$branch &&
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eval ${branch}TIP=$commit
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}
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pull_to_client () {
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number=$1 &&
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heads=$2 &&
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count=$3 &&
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test_expect_success "$number pull" '
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(
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cd client &&
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git fetch-pack -k -v .. $heads &&
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case "$heads" in
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*A*)
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echo $ATIP > .git/refs/heads/A;;
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esac &&
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case "$heads" in *B*)
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echo $BTIP > .git/refs/heads/B;;
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esac &&
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git symbolic-ref HEAD refs/heads/`echo $heads \
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| sed -e "s/^\(.\).*$/\1/"` &&
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git fsck --full &&
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mv .git/objects/pack/pack-* . &&
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p=`ls -1 pack-*.pack` &&
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git unpack-objects <$p &&
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git fsck --full &&
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idx=`echo pack-*.idx` &&
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pack_count=`git show-index <$idx | wc -l` &&
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test $pack_count = $count &&
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rm -f pack-*
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)
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'
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}
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# Here begins the actual testing
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# A1 - ... - A20 - A21
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# \
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# B1 - B2 - .. - B70
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# client pulls A20, B1. Then tracks only B. Then pulls A.
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test_expect_success 'setup' '
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mkdir client &&
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(
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cd client &&
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git init &&
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git config transfer.unpacklimit 0
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) &&
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add A1 &&
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prev=1 &&
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cur=2 &&
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while [ $cur -le 10 ]; do
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add A$cur $(eval echo \$A$prev) &&
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prev=$cur &&
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cur=$(($cur+1))
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done &&
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add B1 $A1 &&
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echo $ATIP > .git/refs/heads/A &&
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echo $BTIP > .git/refs/heads/B &&
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git symbolic-ref HEAD refs/heads/B
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'
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pull_to_client 1st "refs/heads/B refs/heads/A" $((11*3))
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test_expect_success 'post 1st pull setup' '
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add A11 $A10 &&
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prev=1 &&
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cur=2 &&
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while [ $cur -le 65 ]; do
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add B$cur $(eval echo \$B$prev) &&
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prev=$cur &&
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cur=$(($cur+1))
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done
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'
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pull_to_client 2nd "refs/heads/B" $((64*3))
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pull_to_client 3rd "refs/heads/A" $((1*3))
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test_expect_success 'single branch clone' '
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git clone --single-branch "file://$(pwd)/." singlebranch
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'
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test_expect_success 'single branch object count' '
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GIT_DIR=singlebranch/.git git count-objects -v |
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grep "^in-pack:" > count.singlebranch &&
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echo "in-pack: 198" >expected &&
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test_cmp expected count.singlebranch
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'
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test_expect_success 'single given branch clone' '
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git clone --single-branch --branch A "file://$(pwd)/." branch-a &&
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test_must_fail git --git-dir=branch-a/.git rev-parse origin/B
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'
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test_expect_success 'clone shallow depth 1' '
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git clone --no-single-branch --depth 1 "file://$(pwd)/." shallow0 &&
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test "`git --git-dir=shallow0/.git rev-list --count HEAD`" = 1
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'
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test_expect_success 'clone shallow depth 1 with fsck' '
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git config --global fetch.fsckobjects true &&
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git clone --no-single-branch --depth 1 "file://$(pwd)/." shallow0fsck &&
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test "`git --git-dir=shallow0fsck/.git rev-list --count HEAD`" = 1 &&
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git config --global --unset fetch.fsckobjects
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'
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test_expect_success 'clone shallow' '
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git clone --no-single-branch --depth 2 "file://$(pwd)/." shallow
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'
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test_expect_success 'clone shallow depth count' '
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test "`git --git-dir=shallow/.git rev-list --count HEAD`" = 2
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'
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test_expect_success 'clone shallow object count' '
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(
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cd shallow &&
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git count-objects -v
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) > count.shallow &&
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grep "^in-pack: 12" count.shallow
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'
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test_expect_success 'clone shallow object count (part 2)' '
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sed -e "/^in-pack:/d" -e "/^packs:/d" -e "/^size-pack:/d" \
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-e "/: 0$/d" count.shallow > count_output &&
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! test -s count_output
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'
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test_expect_success 'fsck in shallow repo' '
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(
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cd shallow &&
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git fsck --full
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)
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'
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test_expect_success 'simple fetch in shallow repo' '
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(
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cd shallow &&
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git fetch
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)
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'
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test_expect_success 'no changes expected' '
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(
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cd shallow &&
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git count-objects -v
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) > count.shallow.2 &&
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cmp count.shallow count.shallow.2
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'
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test_expect_success 'fetch same depth in shallow repo' '
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(
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cd shallow &&
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git fetch --depth=2
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)
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'
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test_expect_success 'no changes expected' '
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(
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cd shallow &&
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git count-objects -v
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) > count.shallow.3 &&
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cmp count.shallow count.shallow.3
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'
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test_expect_success 'add two more' '
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add B66 $B65 &&
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add B67 $B66
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'
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test_expect_success 'pull in shallow repo' '
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(
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cd shallow &&
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git pull .. B
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)
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'
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test_expect_success 'clone shallow object count' '
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(
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cd shallow &&
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git count-objects -v
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) > count.shallow &&
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grep "^count: 6" count.shallow
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'
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test_expect_success 'add two more (part 2)' '
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add B68 $B67 &&
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add B69 $B68
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'
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test_expect_success 'deepening pull in shallow repo' '
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(
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cd shallow &&
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git pull --depth 4 .. B
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)
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'
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test_expect_success 'clone shallow object count' '
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(
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cd shallow &&
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git count-objects -v
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) > count.shallow &&
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grep "^count: 12" count.shallow
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'
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test_expect_success 'deepening fetch in shallow repo' '
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(
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cd shallow &&
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git fetch --depth 4 .. A:A
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)
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'
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test_expect_success 'clone shallow object count' '
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(
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cd shallow &&
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git count-objects -v
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) > count.shallow &&
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grep "^count: 18" count.shallow
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'
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test_expect_success 'pull in shallow repo with missing merge base' '
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(
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cd shallow &&
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git fetch --depth 4 .. A
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test_must_fail git merge --allow-unrelated-histories FETCH_HEAD
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)
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'
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test_expect_success 'additional simple shallow deepenings' '
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(
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cd shallow &&
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git fetch --depth=8 &&
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git fetch --depth=10 &&
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git fetch --depth=11
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)
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'
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test_expect_success 'clone shallow depth count' '
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test "`git --git-dir=shallow/.git rev-list --count HEAD`" = 11
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'
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test_expect_success 'clone shallow object count' '
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(
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cd shallow &&
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git prune &&
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git count-objects -v
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) > count.shallow &&
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grep "^count: 54" count.shallow
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'
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test_expect_success 'fetch --no-shallow on full repo' '
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test_must_fail git fetch --noshallow
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'
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test_expect_success 'fetch --depth --no-shallow' '
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(
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cd shallow &&
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test_must_fail git fetch --depth=1 --noshallow
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)
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'
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test_expect_success 'turn shallow to complete repository' '
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(
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cd shallow &&
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git fetch --unshallow &&
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! test -f .git/shallow &&
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git fsck --full
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)
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'
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test_expect_success 'clone shallow without --no-single-branch' '
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git clone --depth 1 "file://$(pwd)/." shallow2
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'
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test_expect_success 'clone shallow object count' '
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(
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cd shallow2 &&
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git count-objects -v
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) > count.shallow2 &&
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grep "^in-pack: 3" count.shallow2
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'
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test_expect_success 'clone shallow with --branch' '
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git clone --depth 1 --branch A "file://$(pwd)/." shallow3
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'
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test_expect_success 'clone shallow object count' '
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echo "in-pack: 3" > count3.expected &&
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GIT_DIR=shallow3/.git git count-objects -v |
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grep "^in-pack" > count3.actual &&
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test_cmp count3.expected count3.actual
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'
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test_expect_success 'clone shallow with detached HEAD' '
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git checkout HEAD^ &&
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git clone --depth 1 "file://$(pwd)/." shallow5 &&
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git checkout - &&
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GIT_DIR=shallow5/.git git rev-parse HEAD >actual &&
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git rev-parse HEAD^ >expected &&
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test_cmp expected actual
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'
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test_expect_success 'shallow clone pulling tags' '
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git tag -a -m A TAGA1 A &&
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git tag -a -m B TAGB1 B &&
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git tag TAGA2 A &&
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git tag TAGB2 B &&
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git clone --depth 1 "file://$(pwd)/." shallow6 &&
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cat >taglist.expected <<\EOF &&
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TAGB1
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TAGB2
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EOF
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GIT_DIR=shallow6/.git git tag -l >taglist.actual &&
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test_cmp taglist.expected taglist.actual &&
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echo "in-pack: 4" > count6.expected &&
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GIT_DIR=shallow6/.git git count-objects -v |
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grep "^in-pack" > count6.actual &&
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test_cmp count6.expected count6.actual
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'
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test_expect_success 'shallow cloning single tag' '
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git clone --depth 1 --branch=TAGB1 "file://$(pwd)/." shallow7 &&
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cat >taglist.expected <<\EOF &&
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TAGB1
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TAGB2
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EOF
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GIT_DIR=shallow7/.git git tag -l >taglist.actual &&
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test_cmp taglist.expected taglist.actual &&
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echo "in-pack: 4" > count7.expected &&
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GIT_DIR=shallow7/.git git count-objects -v |
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grep "^in-pack" > count7.actual &&
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test_cmp count7.expected count7.actual
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'
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test_expect_success 'clone shallow with packed refs' '
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git pack-refs --all &&
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git clone --depth 1 --branch A "file://$(pwd)/." shallow8 &&
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echo "in-pack: 4" > count8.expected &&
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GIT_DIR=shallow8/.git git count-objects -v |
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grep "^in-pack" > count8.actual &&
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test_cmp count8.expected count8.actual
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'
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test_expect_success 'fetch in shallow repo unreachable shallow objects' '
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(
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git clone --bare --branch B --single-branch "file://$(pwd)/." no-reflog &&
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git clone --depth 1 "file://$(pwd)/no-reflog" shallow9 &&
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cd no-reflog &&
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git tag -d TAGB1 TAGB2 &&
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git update-ref refs/heads/B B~~ &&
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git gc --prune=now &&
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cd ../shallow9 &&
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git fetch origin &&
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git fsck --no-dangling
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)
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'
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test_expect_success 'fetch creating new shallow root' '
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(
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git clone "file://$(pwd)/." shallow10 &&
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git commit --allow-empty -m empty &&
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cd shallow10 &&
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git fetch --depth=1 --progress 2>actual &&
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# This should fetch only the empty commit, no tree or
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# blob objects
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grep "remote: Total 1" actual
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)
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'
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test_expect_success 'setup tests for the --stdin parameter' '
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for head in C D E F
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do
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add $head
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done &&
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for head in A B C D E F
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do
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git tag $head $head
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done &&
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cat >input <<-\EOF &&
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refs/heads/C
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refs/heads/A
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refs/heads/D
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refs/tags/C
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refs/heads/B
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refs/tags/A
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refs/heads/E
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refs/tags/B
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refs/tags/E
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refs/tags/D
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EOF
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sort <input >expect &&
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(
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echo refs/heads/E &&
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echo refs/tags/E &&
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cat input
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) >input.dup
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'
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test_expect_success 'fetch refs from cmdline' '
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(
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cd client &&
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git fetch-pack --no-progress .. $(cat ../input)
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) >output &&
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cut -d " " -f 2 <output | sort >actual &&
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test_cmp expect actual
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'
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test_expect_success 'fetch refs from stdin' '
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(
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cd client &&
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git fetch-pack --stdin --no-progress .. <../input
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) >output &&
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cut -d " " -f 2 <output | sort >actual &&
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test_cmp expect actual
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'
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test_expect_success 'fetch mixed refs from cmdline and stdin' '
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(
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cd client &&
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tail -n +5 ../input |
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git fetch-pack --stdin --no-progress .. $(head -n 4 ../input)
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) >output &&
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cut -d " " -f 2 <output | sort >actual &&
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test_cmp expect actual
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'
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test_expect_success 'test duplicate refs from stdin' '
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(
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cd client &&
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git fetch-pack --stdin --no-progress .. <../input.dup
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) >output &&
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cut -d " " -f 2 <output | sort >actual &&
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test_cmp expect actual
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'
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test_expect_success 'set up tests of missing reference' '
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cat >expect-error <<-\EOF
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error: no such remote ref refs/heads/xyzzy
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EOF
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'
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test_expect_success 'test lonely missing ref' '
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(
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cd client &&
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test_must_fail git fetch-pack --no-progress .. refs/heads/xyzzy
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) >/dev/null 2>error-m &&
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test_cmp expect-error error-m
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'
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test_expect_success 'test missing ref after existing' '
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(
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cd client &&
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test_must_fail git fetch-pack --no-progress .. refs/heads/A refs/heads/xyzzy
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) >/dev/null 2>error-em &&
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test_cmp expect-error error-em
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'
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test_expect_success 'test missing ref before existing' '
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(
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cd client &&
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test_must_fail git fetch-pack --no-progress .. refs/heads/xyzzy refs/heads/A
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) >/dev/null 2>error-me &&
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test_cmp expect-error error-me
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'
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test_expect_success 'test --all, --depth, and explicit head' '
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(
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cd client &&
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git fetch-pack --no-progress --all --depth=1 .. refs/heads/A
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) >out-adh 2>error-adh
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'
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test_expect_success 'test --all, --depth, and explicit tag' '
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git tag OLDTAG refs/heads/B~5 &&
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(
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cd client &&
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git fetch-pack --no-progress --all --depth=1 .. refs/tags/OLDTAG
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) >out-adt 2>error-adt
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'
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test_expect_success 'shallow fetch with tags does not break the repository' '
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mkdir repo1 &&
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(
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cd repo1 &&
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git init &&
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test_commit 1 &&
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test_commit 2 &&
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test_commit 3 &&
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mkdir repo2 &&
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cd repo2 &&
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git init &&
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git fetch --depth=2 ../.git master:branch &&
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git fsck
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)
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'
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check_prot_path () {
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cat >expected <<-EOF &&
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Diag: url=$1
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Diag: protocol=$2
|
|
Diag: path=$3
|
|
EOF
|
|
git fetch-pack --diag-url "$1" | grep -v hostandport= >actual &&
|
|
test_cmp expected actual
|
|
}
|
|
|
|
check_prot_host_port_path () {
|
|
local diagport
|
|
case "$2" in
|
|
*ssh*)
|
|
pp=ssh
|
|
uah=userandhost
|
|
ehost=$(echo $3 | tr -d "[]")
|
|
diagport="Diag: port=$4"
|
|
;;
|
|
*)
|
|
pp=$p
|
|
uah=hostandport
|
|
ehost=$(echo $3$4 | sed -e "s/22$/:22/" -e "s/NONE//")
|
|
diagport=""
|
|
;;
|
|
esac
|
|
cat >exp <<-EOF &&
|
|
Diag: url=$1
|
|
Diag: protocol=$pp
|
|
Diag: $uah=$ehost
|
|
$diagport
|
|
Diag: path=$5
|
|
EOF
|
|
grep -v "^$" exp >expected
|
|
git fetch-pack --diag-url "$1" >actual &&
|
|
test_cmp expected actual
|
|
}
|
|
|
|
for r in repo re:po re/po
|
|
do
|
|
# git or ssh with scheme
|
|
for p in "ssh+git" "git+ssh" git ssh
|
|
do
|
|
for h in host user@host user@[::1] user@::1
|
|
do
|
|
for c in "" :
|
|
do
|
|
test_expect_success "fetch-pack --diag-url $p://$h$c/$r" '
|
|
check_prot_host_port_path $p://$h/$r $p "$h" NONE "/$r"
|
|
'
|
|
# "/~" -> "~" conversion
|
|
test_expect_success "fetch-pack --diag-url $p://$h$c/~$r" '
|
|
check_prot_host_port_path $p://$h/~$r $p "$h" NONE "~$r"
|
|
'
|
|
done
|
|
done
|
|
for h in host User@host User@[::1]
|
|
do
|
|
test_expect_success "fetch-pack --diag-url $p://$h:22/$r" '
|
|
check_prot_host_port_path $p://$h:22/$r $p "$h" 22 "/$r"
|
|
'
|
|
done
|
|
done
|
|
# file with scheme
|
|
for p in file
|
|
do
|
|
test_expect_success "fetch-pack --diag-url $p://$h/$r" '
|
|
check_prot_path $p://$h/$r $p "/$r"
|
|
'
|
|
# No "/~" -> "~" conversion for file
|
|
test_expect_success "fetch-pack --diag-url $p://$h/~$r" '
|
|
check_prot_path $p://$h/~$r $p "/~$r"
|
|
'
|
|
done
|
|
# file without scheme
|
|
for h in nohost nohost:12 [::1] [::1]:23 [ [:aa
|
|
do
|
|
test_expect_success "fetch-pack --diag-url ./$h:$r" '
|
|
check_prot_path ./$h:$r $p "./$h:$r"
|
|
'
|
|
# No "/~" -> "~" conversion for file
|
|
test_expect_success "fetch-pack --diag-url ./$p:$h/~$r" '
|
|
check_prot_path ./$p:$h/~$r $p "./$p:$h/~$r"
|
|
'
|
|
done
|
|
#ssh without scheme
|
|
p=ssh
|
|
for h in host [::1]
|
|
do
|
|
test_expect_success "fetch-pack --diag-url $h:$r" '
|
|
check_prot_host_port_path $h:$r $p "$h" NONE "$r"
|
|
'
|
|
# Do "/~" -> "~" conversion
|
|
test_expect_success "fetch-pack --diag-url $h:/~$r" '
|
|
check_prot_host_port_path $h:/~$r $p "$h" NONE "~$r"
|
|
'
|
|
done
|
|
done
|
|
|
|
test_expect_success MINGW 'fetch-pack --diag-url file://c:/repo' '
|
|
check_prot_path file://c:/repo file c:/repo
|
|
'
|
|
test_expect_success MINGW 'fetch-pack --diag-url c:repo' '
|
|
check_prot_path c:repo file c:repo
|
|
'
|
|
|
|
test_done
|