travis-ci: record and skip successfully built trees
[git/git.git] / ci / lib-travisci.sh
1 # Library of functions shared by all CI scripts
2
3 skip_branch_tip_with_tag () {
4 # Sometimes, a branch is pushed at the same time the tag that points
5 # at the same commit as the tip of the branch is pushed, and building
6 # both at the same time is a waste.
7 #
8 # Travis gives a tagname e.g. v2.14.0 in $TRAVIS_BRANCH when
9 # the build is triggered by a push to a tag. Let's see if
10 # $TRAVIS_BRANCH is exactly at a tag, and if so, if it is
11 # different from $TRAVIS_BRANCH. That way, we can tell if
12 # we are building the tip of a branch that is tagged and
13 # we can skip the build because we won't be skipping a build
14 # of a tag.
15
16 if TAG=$(git describe --exact-match "$TRAVIS_BRANCH" 2>/dev/null) &&
17 test "$TAG" != "$TRAVIS_BRANCH"
18 then
19 echo "$(tput setaf 2)Tip of $TRAVIS_BRANCH is exactly at $TAG$(tput sgr0)"
20 exit 0
21 fi
22 }
23
24 good_trees_file="$HOME/travis-cache/good-trees"
25
26 # Save some info about the current commit's tree, so we can skip the build
27 # job if we encounter the same tree again and can provide a useful info
28 # message.
29 save_good_tree () {
30 echo "$(git rev-parse $TRAVIS_COMMIT^{tree}) $TRAVIS_COMMIT $TRAVIS_JOB_NUMBER $TRAVIS_JOB_ID" >>"$good_trees_file"
31 # limit the file size
32 tail -1000 "$good_trees_file" >"$good_trees_file".tmp
33 mv "$good_trees_file".tmp "$good_trees_file"
34 }
35
36 # Skip the build job if the same tree has already been built and tested
37 # successfully before (e.g. because the branch got rebased, changing only
38 # the commit messages).
39 skip_good_tree () {
40 if ! good_tree_info="$(grep "^$(git rev-parse $TRAVIS_COMMIT^{tree}) " "$good_trees_file")"
41 then
42 # Haven't seen this tree yet, or no cached good trees file yet.
43 # Continue the build job.
44 return
45 fi
46
47 echo "$good_tree_info" | {
48 read tree prev_good_commit prev_good_job_number prev_good_job_id
49
50 if test "$TRAVIS_JOB_ID" = "$prev_good_job_id"
51 then
52 cat <<-EOF
53 $(tput setaf 2)Skipping build job for commit $TRAVIS_COMMIT.$(tput sgr0)
54 This commit has already been built and tested successfully by this build job.
55 To force a re-build delete the branch's cache and then hit 'Restart job'.
56 EOF
57 else
58 cat <<-EOF
59 $(tput setaf 2)Skipping build job for commit $TRAVIS_COMMIT.$(tput sgr0)
60 This commit's tree has already been built and tested successfully in build job $prev_good_job_number for commit $prev_good_commit.
61 The log of that build job is available at https://travis-ci.org/$TRAVIS_REPO_SLUG/jobs/$prev_good_job_id
62 To force a re-build delete the branch's cache and then hit 'Restart job'.
63 EOF
64 fi
65 }
66
67 exit 0
68 }
69
70 # Set 'exit on error' for all CI scripts to let the caller know that
71 # something went wrong.
72 # Set tracing executed commands, primarily setting environment variables
73 # and installing dependencies.
74 set -ex
75
76 mkdir -p "$HOME/travis-cache"
77
78 skip_branch_tip_with_tag
79 skip_good_tree
80
81 if test -z "$jobname"
82 then
83 jobname="$TRAVIS_OS_NAME-$CC"
84 fi
85
86 export DEVELOPER=1
87 export DEFAULT_TEST_TARGET=prove
88 export GIT_PROVE_OPTS="--timer --jobs 3 --state=failed,slow,save"
89 export GIT_TEST_OPTS="--verbose-log"
90 export GIT_TEST_CLONE_2GB=YesPlease
91
92 case "$jobname" in
93 linux-clang|linux-gcc)
94 export GIT_TEST_HTTPD=YesPlease
95
96 # The Linux build installs the defined dependency versions below.
97 # The OS X build installs the latest available versions. Keep that
98 # in mind when you encounter a broken OS X build!
99 export LINUX_P4_VERSION="16.2"
100 export LINUX_GIT_LFS_VERSION="1.5.2"
101
102 P4_PATH="$(pwd)/custom/p4"
103 GIT_LFS_PATH="$(pwd)/custom/git-lfs"
104 export PATH="$GIT_LFS_PATH:$P4_PATH:$PATH"
105 ;;
106 osx-clang|osx-gcc)
107 # t9810 occasionally fails on Travis CI OS X
108 # t9816 occasionally fails with "TAP out of sequence errors" on
109 # Travis CI OS X
110 export GIT_SKIP_TESTS="t9810 t9816"
111 ;;
112 GETTEXT_POISON)
113 export GETTEXT_POISON=YesPlease
114 ;;
115 esac