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fb1d6dabce
While use of the --reference option to borrow objects from an existing local repository of the same project is an effective way to reduce traffic when cloning a project over the network, it makes the resulting "borrowing" repository dependent on the "borrowed" repository. After running git clone --reference=P $URL Q the resulting repository Q will be broken if the borrowed repository P disappears. The way to allow the borrowed repository to be removed is to repack the borrowing repository (i.e. run "git repack -a -d" in Q); while power users may know it very well, it is not easily discoverable. Teach a new "--dissociate" option to "git clone" to run this repacking for the user. Helped-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
218 lines
4.8 KiB
Bash
Executable file
218 lines
4.8 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (C) 2006 Martin Waitz <tali@admingilde.org>
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#
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test_description='test clone --reference'
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. ./test-lib.sh
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base_dir=`pwd`
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U=$base_dir/UPLOAD_LOG
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test_expect_success 'preparing first repository' \
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'test_create_repo A && cd A &&
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echo first > file1 &&
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git add file1 &&
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git commit -m initial'
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cd "$base_dir"
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test_expect_success 'preparing second repository' \
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'git clone A B && cd B &&
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echo second > file2 &&
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git add file2 &&
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git commit -m addition &&
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git repack -a -d &&
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git prune'
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cd "$base_dir"
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test_expect_success 'cloning with reference (-l -s)' \
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'git clone -l -s --reference B A C'
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cd "$base_dir"
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test_expect_success 'existence of info/alternates' \
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'test_line_count = 2 C/.git/objects/info/alternates'
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cd "$base_dir"
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test_expect_success 'pulling from reference' \
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'cd C &&
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git pull ../B master'
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cd "$base_dir"
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test_expect_success 'that reference gets used' \
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'cd C &&
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echo "0 objects, 0 kilobytes" > expected &&
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git count-objects > current &&
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test_cmp expected current'
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cd "$base_dir"
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rm -f "$U.D"
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test_expect_success 'cloning with reference (no -l -s)' '
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GIT_TRACE_PACKET=$U.D git clone --reference B "file://$(pwd)/A" D
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'
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test_expect_success 'fetched no objects' '
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test -s "$U.D" &&
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! grep " want" "$U.D"
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'
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cd "$base_dir"
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test_expect_success 'existence of info/alternates' \
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'test_line_count = 1 D/.git/objects/info/alternates'
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cd "$base_dir"
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test_expect_success 'pulling from reference' \
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'cd D && git pull ../B master'
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cd "$base_dir"
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test_expect_success 'that reference gets used' \
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'cd D && echo "0 objects, 0 kilobytes" > expected &&
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git count-objects > current &&
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test_cmp expected current'
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cd "$base_dir"
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test_expect_success 'updating origin' \
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'cd A &&
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echo third > file3 &&
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git add file3 &&
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git commit -m update &&
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git repack -a -d &&
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git prune'
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cd "$base_dir"
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test_expect_success 'pulling changes from origin' \
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'cd C &&
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git pull origin'
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cd "$base_dir"
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# the 2 local objects are commit and tree from the merge
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test_expect_success 'that alternate to origin gets used' \
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'cd C &&
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echo "2 objects" > expected &&
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git count-objects | cut -d, -f1 > current &&
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test_cmp expected current'
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cd "$base_dir"
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test_expect_success 'pulling changes from origin' \
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'cd D &&
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git pull origin'
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cd "$base_dir"
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# the 5 local objects are expected; file3 blob, commit in A to add it
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# and its tree, and 2 are our tree and the merge commit.
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test_expect_success 'check objects expected to exist locally' \
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'cd D &&
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echo "5 objects" > expected &&
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git count-objects | cut -d, -f1 > current &&
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test_cmp expected current'
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cd "$base_dir"
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test_expect_success 'preparing alternate repository #1' \
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'test_create_repo F && cd F &&
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echo first > file1 &&
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git add file1 &&
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git commit -m initial'
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cd "$base_dir"
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test_expect_success 'cloning alternate repo #2 and adding changes to repo #1' \
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'git clone F G && cd F &&
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echo second > file2 &&
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git add file2 &&
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git commit -m addition'
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cd "$base_dir"
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test_expect_success 'cloning alternate repo #1, using #2 as reference' \
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'git clone --reference G F H'
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cd "$base_dir"
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test_expect_success 'cloning with reference being subset of source (-l -s)' \
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'git clone -l -s --reference A B E'
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cd "$base_dir"
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test_expect_success 'clone with reference from a tagged repository' '
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(
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cd A && git tag -a -m 'tagged' HEAD
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) &&
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git clone --reference=A A I
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'
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test_expect_success 'prepare branched repository' '
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git clone A J &&
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(
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cd J &&
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git checkout -b other master^ &&
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echo other >otherfile &&
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git add otherfile &&
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git commit -m other &&
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git checkout master
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)
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'
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rm -f "$U.K"
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test_expect_success 'fetch with incomplete alternates' '
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git init K &&
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echo "$base_dir/A/.git/objects" >K/.git/objects/info/alternates &&
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(
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cd K &&
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git remote add J "file://$base_dir/J" &&
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GIT_TRACE_PACKET=$U.K git fetch J
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) &&
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master_object=$(cd A && git for-each-ref --format="%(objectname)" refs/heads/master) &&
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test -s "$U.K" &&
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! grep " want $master_object" "$U.K" &&
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tag_object=$(cd A && git for-each-ref --format="%(objectname)" refs/tags/HEAD) &&
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! grep " want $tag_object" "$U.K"
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'
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test_expect_success 'clone using repo with gitfile as a reference' '
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git clone --separate-git-dir=L A M &&
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git clone --reference=M A N &&
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echo "$base_dir/L/objects" >expected &&
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test_cmp expected "$base_dir/N/.git/objects/info/alternates"
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'
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test_expect_success 'clone using repo pointed at by gitfile as reference' '
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git clone --reference=M/.git A O &&
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echo "$base_dir/L/objects" >expected &&
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test_cmp expected "$base_dir/O/.git/objects/info/alternates"
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'
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test_expect_success 'clone and dissociate from reference' '
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git init P &&
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(
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cd P && test_commit one
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) &&
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git clone P Q &&
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(
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cd Q && test_commit two
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) &&
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git clone --no-local --reference=P Q R &&
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git clone --no-local --reference=P --dissociate Q S &&
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# removing the reference P would corrupt R but not S
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rm -fr P &&
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test_must_fail git -C R fsck &&
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git -C S fsck
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'
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test_done
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