3 test_description
='split commit graph'
6 GIT_TEST_COMMIT_GRAPH
=0
8 test_expect_success
'setup repo' '
10 git config core.commitGraph true &&
11 infodir=".git/objects/info" &&
12 graphdir="$infodir/commit-graphs" &&
23 header: 43475048 1 1 3 $NUM_BASE
25 chunks: oid_fanout oid_lookup commit_metadata
27 git commit-graph
read >output
&&
28 test_cmp expect output
31 test_expect_success
'create commits and write commit-graph' '
32 for i in $(test_seq 3)
35 git branch commits/$i || return 1
37 git commit-graph write --reachable &&
38 test_path_is_file $infodir/commit-graph &&
42 graph_git_two_modes
() {
43 git
-c core.commitGraph
=true
$1 >output
44 git
-c core.commitGraph
=false
$1 >expect
45 test_cmp expect output
48 graph_git_behavior
() {
52 test_expect_success
"check normal git operations: $MSG" '
53 graph_git_two_modes "log --oneline $BRANCH" &&
54 graph_git_two_modes "log --topo-order $BRANCH" &&
55 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
56 graph_git_two_modes "branch -vv" &&
57 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
61 graph_git_behavior
'graph exists' commits
/3 commits
/1
63 verify_chain_files_exist
() {
64 for hash in $
(cat $1/commit-graph-chain
)
66 test_path_is_file
$1/graph-
$hash.graph ||
return 1
70 test_expect_success
'add more commits, and write a new base graph' '
71 git reset --hard commits/1 &&
72 for i in $(test_seq 4 5)
75 git branch commits/$i || return 1
77 git reset --hard commits/2 &&
78 for i in $(test_seq 6 10)
81 git branch commits/$i || return 1
83 git reset --hard commits/2 &&
84 git merge commits/4 &&
86 git reset --hard commits/4 &&
87 git merge commits/6 &&
89 git commit-graph write --reachable &&
93 test_expect_success
'fork and fail to base a chain on a commit-graph file' '
94 test_when_finished rm -rf fork &&
98 rm .git/objects/info/commit-graph &&
99 echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
100 test_commit new-commit &&
101 git commit-graph write --reachable --split &&
102 test_path_is_file $graphdir/commit-graph-chain &&
103 test_line_count = 1 $graphdir/commit-graph-chain &&
104 verify_chain_files_exist $graphdir
108 test_expect_success
'add three more commits, write a tip graph' '
109 git reset --hard commits/3 &&
111 git merge commits/5 &&
113 git branch merge/3 &&
114 git commit-graph write --reachable --split &&
115 test_path_is_missing $infodir/commit-graph &&
116 test_path_is_file $graphdir/commit-graph-chain &&
117 ls $graphdir/graph-*.graph >graph-files &&
118 test_line_count = 2 graph-files &&
119 verify_chain_files_exist $graphdir
122 graph_git_behavior
'split commit-graph: merge 3 vs 2' merge
/3 merge
/2
124 test_expect_success
'add one commit, write a tip graph' '
126 git branch commits/11 &&
127 git commit-graph write --reachable --split &&
128 test_path_is_missing $infodir/commit-graph &&
129 test_path_is_file $graphdir/commit-graph-chain &&
130 ls $graphdir/graph-*.graph >graph-files &&
131 test_line_count = 3 graph-files &&
132 verify_chain_files_exist $graphdir
135 graph_git_behavior
'three-layer commit-graph: commit 11 vs 6' commits
/11 commits
/6
137 test_expect_success
'add one commit, write a merged graph' '
139 git branch commits/12 &&
140 git commit-graph write --reachable --split &&
141 test_path_is_file $graphdir/commit-graph-chain &&
142 test_line_count = 2 $graphdir/commit-graph-chain &&
143 ls $graphdir/graph-*.graph >graph-files &&
144 test_line_count = 2 graph-files &&
145 verify_chain_files_exist $graphdir
148 graph_git_behavior
'merged commit-graph: commit 12 vs 6' commits
/12 commits
/6
150 test_expect_success
'create fork and chain across alternate' '
154 git config core.commitGraph true &&
156 echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
158 git branch commits/13 &&
159 git commit-graph write --reachable --split &&
160 test_path_is_file $graphdir/commit-graph-chain &&
161 test_line_count = 3 $graphdir/commit-graph-chain &&
162 ls $graphdir/graph-*.graph >graph-files &&
163 test_line_count = 1 graph-files &&
164 git -c core.commitGraph=true rev-list HEAD >expect &&
165 git -c core.commitGraph=false rev-list HEAD >actual &&
166 test_cmp expect actual
170 graph_git_behavior
'alternate: commit 13 vs 6' commits
/13 commits
/6