4f2b674e5de6e4b9c8c4ab9fd9684d99aa1cae50
1#!/bin/bash
2. shellopts.sh
3set -e
4
5create()
6{
7 echo "$1" >"$1"
8 git add "$1"
9}
10
11check()
12{
13 echo
14 echo "check:" "$@"
15 if "$@"; then
16 echo ok
17 return 0
18 else
19 echo FAILED
20 exit 1
21 fi
22}
23
24check_equal()
25{
26 echo
27 echo "check a:" "$1"
28 echo " b:" "$2"
29 if [ "$1" = "$2" ]; then
30 return 0
31 else
32 echo FAILED
33 exit 1
34 fi
35}
36
37fixnl()
38{
39 t=""
40 while read x; do
41 t="$t$x "
42 done
43 echo $t
44}
45
46multiline()
47{
48 while read x; do
49 set -- $x
50 for d in "$@"; do
51 echo "$d"
52 done
53 done
54}
55
56rm -rf mainline subproj
57mkdir mainline subproj
58
59cd subproj
60git init
61
62create sub1
63git commit -m 'sub1'
64git branch sub1
65git branch -m master subproj
66check true
67
68create sub2
69git commit -m 'sub2'
70git branch sub2
71
72create sub3
73git commit -m 'sub3'
74git branch sub3
75
76cd ../mainline
77git init
78create main4
79git commit -m 'main4'
80git branch -m master mainline
81
82git fetch ../subproj sub1
83git branch sub1 FETCH_HEAD
84git subtree add --prefix=subdir FETCH_HEAD
85
86# this shouldn't actually do anything, since FETCH_HEAD is already a parent
87git merge -m 'merge -s -ours' -s ours FETCH_HEAD
88
89create subdir/main-sub5
90git commit -m 'main-sub5'
91
92create main6
93git commit -m 'main6 boring'
94
95create subdir/main-sub7
96git commit -m 'main-sub7'
97
98git fetch ../subproj sub2
99git branch sub2 FETCH_HEAD
100git subtree merge --prefix=subdir FETCH_HEAD
101git branch pre-split
102
103split1=$(git subtree split --annotate='*' --prefix subdir --onto FETCH_HEAD --rejoin)
104echo "split1={$split1}"
105git branch split1 "$split1"
106
107create subdir/main-sub8
108git commit -m 'main-sub8'
109
110cd ../subproj
111git fetch ../mainline split1
112git branch split1 FETCH_HEAD
113git merge FETCH_HEAD
114
115create sub9
116git commit -m 'sub9'
117
118cd ../mainline
119split2=$(git subtree split --annotate='*' --prefix subdir --rejoin)
120git branch split2 "$split2"
121
122create subdir/main-sub10
123git commit -m 'main-sub10'
124
125split3=$(git subtree split --annotate='*' --prefix subdir --rejoin)
126git branch split3 "$split3"
127
128cd ../subproj
129git fetch ../mainline split3
130git branch split3 FETCH_HEAD
131git merge FETCH_HEAD
132git branch subproj-merge-split3
133
134chkm="main4 main6"
135chkms="main-sub10 main-sub5 main-sub7 main-sub8"
136chkms_sub=$(echo $chkms | multiline | sed 's,^,subdir/,' | fixnl)
137chks="sub1 sub2 sub3 sub9"
138chks_sub=$(echo $chks | multiline | sed 's,^,subdir/,' | fixnl)
139
140# make sure exactly the right set of files ends up in the subproj
141subfiles=$(git ls-files | fixnl)
142check_equal "$subfiles" "$chkms $chks"
143
144# make sure the subproj history *only* contains commits that affect the subdir.
145allchanges=$(git log --name-only --pretty=format:'' | sort | fixnl)
146check_equal "$allchanges" "$chkms $chks"
147
148cd ../mainline
149git fetch ../subproj subproj-merge-split3
150git branch subproj-merge-split3 FETCH_HEAD
151git subtree pull --prefix=subdir ../subproj subproj-merge-split3
152
153# make sure exactly the right set of files ends up in the mainline
154mainfiles=$(git ls-files | fixnl)
155check_equal "$mainfiles" "$chkm $chkms_sub $chks_sub"
156
157# make sure each filename changed exactly once in the entire history.
158# 'main-sub??' and '/subdir/main-sub??' both change, because those are the
159# changes that were split into their own history. And 'subdir/sub??' never
160# change, since they were *only* changed in the subtree branch.
161allchanges=$(git log --name-only --pretty=format:'' | sort | fixnl)
162check_equal "$allchanges" "$chkm $chkms $chks $chkms_sub"
163