commit-graph: allow cross-alternate chains
[git/git.git] / t / t5324-split-commit-graph.sh
CommitLineData
135a7123
DS
1#!/bin/sh
2
3test_description='split commit graph'
4. ./test-lib.sh
5
6GIT_TEST_COMMIT_GRAPH=0
7
8test_expect_success 'setup repo' '
9 git init &&
10 git config core.commitGraph true &&
11 infodir=".git/objects/info" &&
12 graphdir="$infodir/commit-graphs" &&
13 test_oid_init
14'
15
16graph_read_expect() {
17 NUM_BASE=0
18 if test ! -z $2
19 then
20 NUM_BASE=$2
21 fi
22 cat >expect <<- EOF
23 header: 43475048 1 1 3 $NUM_BASE
24 num_commits: $1
25 chunks: oid_fanout oid_lookup commit_metadata
26 EOF
27 git commit-graph read >output &&
28 test_cmp expect output
29}
30
31test_expect_success 'create commits and write commit-graph' '
32 for i in $(test_seq 3)
33 do
34 test_commit $i &&
35 git branch commits/$i || return 1
36 done &&
37 git commit-graph write --reachable &&
38 test_path_is_file $infodir/commit-graph &&
39 graph_read_expect 3
40'
41
42graph_git_two_modes() {
43 git -c core.commitGraph=true $1 >output
44 git -c core.commitGraph=false $1 >expect
45 test_cmp expect output
46}
47
48graph_git_behavior() {
49 MSG=$1
50 BRANCH=$2
51 COMPARE=$3
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"
58 '
59}
60
61graph_git_behavior 'graph exists' commits/3 commits/1
62
63verify_chain_files_exist() {
64 for hash in $(cat $1/commit-graph-chain)
65 do
66 test_path_is_file $1/graph-$hash.graph || return 1
67 done
68}
69
70test_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)
73 do
74 test_commit $i &&
75 git branch commits/$i || return 1
76 done &&
77 git reset --hard commits/2 &&
78 for i in $(test_seq 6 10)
79 do
80 test_commit $i &&
81 git branch commits/$i || return 1
82 done &&
83 git reset --hard commits/2 &&
84 git merge commits/4 &&
85 git branch merge/1 &&
86 git reset --hard commits/4 &&
87 git merge commits/6 &&
88 git branch merge/2 &&
89 git commit-graph write --reachable &&
90 graph_read_expect 12
91'
92
c523035c
DS
93test_expect_success 'fork and fail to base a chain on a commit-graph file' '
94 test_when_finished rm -rf fork &&
95 git clone . fork &&
96 (
97 cd 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
105 )
106'
107
135a7123
DS
108test_expect_success 'add three more commits, write a tip graph' '
109 git reset --hard commits/3 &&
110 git merge merge/1 &&
111 git merge commits/5 &&
112 git merge merge/2 &&
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
120'
121
122graph_git_behavior 'split commit-graph: merge 3 vs 2' merge/3 merge/2
123
124test_expect_success 'add one commit, write a tip graph' '
125 test_commit 11 &&
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
133'
134
135graph_git_behavior 'three-layer commit-graph: commit 11 vs 6' commits/11 commits/6
136
1771be90
DS
137test_expect_success 'add one commit, write a merged graph' '
138 test_commit 12 &&
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 = 4 graph-files &&
145 verify_chain_files_exist $graphdir
146'
147
148graph_git_behavior 'merged commit-graph: commit 12 vs 6' commits/12 commits/6
149
c523035c
DS
150test_expect_success 'create fork and chain across alternate' '
151 git clone . fork &&
152 (
153 cd fork &&
154 git config core.commitGraph true &&
155 rm -rf $graphdir &&
156 echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
157 test_commit 13 &&
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
167 )
168'
169
170graph_git_behavior 'alternate: commit 13 vs 6' commits/13 commits/6
171
135a7123 172test_done