Created
March 16, 2011 21:09
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A simple showcase of how you can use git bisect and maven to find a commit that introduced a bug.
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| ktoso@dynames breakMe $ mvn org.apache.maven.plugins:maven-archetype-plugin:1.0-alpha-7:create -DarchetypeGroupId=org.apache.maven.archetypes -DarchetypeArtifactId=maven-archetype-quickstart -DartifactId=bisectfun -DgroupId=pl.project13 | |
| #......................... | |
| ktoso@dynames breakMe $ ls | |
| bisectfun mavenbisect.sh | |
| ktoso@dynames breakMe $ cd bisectfun/ | |
| ktoso@dynames bisectfun $ mkdir src/test/resources/ | |
| ktoso@dynames bisectfun $ git init . | |
| Initialized empty Git repository in /tmp/breakMe/bisectfun/.git/ | |
| ktoso@dynames bisectfun $ git commit ^C | |
| ktoso@dynames bisectfun $ vim .gitignore | |
| ktoso@dynames bisectfun $ git add . | |
| ktoso@dynames bisectfun $ git commit | |
| [master (root-commit) 5b46510] Initial commit | |
| 4 files changed, 78 insertions(+), 0 deletions(-) | |
| create mode 100644 .gitignore | |
| create mode 100644 pom.xml | |
| create mode 100644 src/main/java/pl/project13/App.java | |
| create mode 100644 src/test/java/pl/project13/AppTest.java | |
| ******************************************************************************** | |
| Git Achievement Unlocked! | |
| Master Author (Level 10) | |
| Made 2^Level commits using git commit. | |
| ******************************************************************************** | |
| #......................... | |
| ktoso@dynames bisectfun @ master $ mvn test | |
| #......................... | |
| [INFO] BUILD SUCCESSFUL | |
| #......................... | |
| ktoso@dynames bisectfun @ master $ git tag wasOkHere | |
| ktoso@dynames bisectfun @ master $ for i in {1..50}; do fortune > src/test/resources/fortune$i; git add .; git commit -a -m 'some commit'; done; | |
| [master 20ae1c1] some commit | |
| 1 files changed, 3 insertions(+), 0 deletions(-) | |
| create mode 100644 src/test/resources/fortune1 | |
| [master 64b779e] some commit | |
| 1 files changed, 15 insertions(+), 0 deletions(-) | |
| create mode 100644 src/test/resources/fortune2 | |
| #......................... | |
| #......................... | |
| #......................... | |
| ktoso@dynames bisectfun @ master $ mvn clean test > /dev/null 2> /dev/null | |
| ktoso@dynames bisectfun @ master $ echo $? | |
| 0 | |
| ktoso@dynames bisectfun @ master $ echo "fail :D" >> src/test/java/pl/project13/AppTest.java | |
| ktoso@dynames bisectfun @ master $ echo "fail :D" >> src/test/java/pl/project13/AppTest.java | |
| ktoso@dynames bisectfun @ master $ echo "fail :D" >> src/test/java/pl/project13/AppTest.java | |
| ktoso@dynames bisectfun @ master $ git add . | |
| ktoso@dynames bisectfun @ master $ git commit | |
| [master 09a58fb] let it crash | |
| 1 files changed, 3 insertions(+), 0 deletions(-) | |
| ktoso@dynames bisectfun @ master $ for i in {1..50}; do fortune > src/test/resources/fortune$i; git add .; git commit -a -m 'some commit'; done; | |
| [master f83cdae] some commit | |
| 1 files changed, 3 insertions(+), 3 deletions(-) | |
| [master 725c5ce] some commit | |
| 1 files changed, 4 insertions(+), 15 deletions(-) | |
| rewrite src/test/resources/fortune2 (100%) | |
| #......................... | |
| #......................... | |
| #......................... | |
| ktoso@dynames bisectfun @ master $ for i imvn clean test > /dev/null 2> /dev/null | |
| ktoso@dynames bisectfun @ master $ echo $? | |
| 1 | |
| ktoso@dynames bisectfun @ master $ echo '!!!!!!!!!!!!!!OH NO IT FAILS!!!!!!!!' | |
| !!!!!!!!!!!!!!!!OH NO IT FAILS!!!!!!!! | |
| ktoso@dynames bisectfun @ master $ git tag failsHere | |
| ktoso@dynames bisectfun @ master $ git bisect start | |
| ktoso@dynames bisectfun @ master $ git bisect bad failsHere | |
| ktoso@dynames bisectfun @ master $ git bisect good wasOkHere | |
| Bisecting: 50 revisions left to test after this (roughly 6 steps) | |
| [ca199e0cbd19e498eabf6196036313e206b00a7f] some commit | |
| ktoso@dynames bisectfun @ (no branch) $ git bisect run ../mavenbisect.sh | |
| running ../mavenbisect.sh | |
| Bisecting: 25 revisions left to test after this (roughly 5 steps) | |
| [c8658db8e0c5df1d603a9a96ae7a04e71c4ba9d1] some commit | |
| running ../mavenbisect.sh | |
| Bisecting: 12 revisions left to test after this (roughly 4 steps) | |
| [ddc2100ab90d0624df74e81f17d7ed7ea0fc9a61] some commit | |
| running ../mavenbisect.sh | |
| Bisecting: 5 revisions left to test after this (roughly 3 steps) | |
| [31ba35661eecb7a96159e483954d315a63a3789d] some commit | |
| running ../mavenbisect.sh | |
| Bisecting: 2 revisions left to test after this (roughly 2 steps) | |
| [725c5cec8803b1e62dd36a3b74fd8c52d42e807c] some commit | |
| running ../mavenbisect.sh | |
| Bisecting: 0 revisions left to test after this (roughly 1 step) | |
| [f83cdaeb34072a6f9c9a63abf8bb8f2390b996de] some commit | |
| running ../mavenbisect.sh | |
| Bisecting: 0 revisions left to test after this (roughly 0 steps) | |
| [09a58fbf2821c4f66c003a65f19f6ff99f5ee37d] let it crash | |
| running ../mavenbisect.sh | |
| 09a58fbf2821c4f66c003a65f19f6ff99f5ee37d is the first bad commit | |
| commit 09a58fbf2821c4f66c003a65f19f6ff99f5ee37d | |
| Author: Konrad Malawski <konrad.malawski@project13.pl> | |
| Date: Wed Mar 16 22:02:38 2011 +0100 | |
| let it crash | |
| :040000 040000 ef88527072e0b1532819a75f288a0e65a2737c6a 49083a7d820a731d5edad117a4af097bd9ffb444 M src | |
| bisect run success | |
| ktoso@dynames bisectfun @ (no branch) $ git show 09a58fbf2821c4f66c003a65f19f6ff99f5ee37d | |
| commit 09a58fbf2821c4f66c003a65f19f6ff99f5ee37d | |
| Author: Konrad Malawski <konrad.malawski@project13.pl> | |
| Date: Wed Mar 16 22:02:38 2011 +0100 | |
| let it crash | |
| diff --git a/src/test/java/pl/project13/AppTest.java b/src/test/java/pl/project13/AppTest.java | |
| index c6ffd44..b27c8b8 100644 | |
| --- a/src/test/java/pl/project13/AppTest.java | |
| +++ b/src/test/java/pl/project13/AppTest.java | |
| @@ -36,3 +36,6 @@ public class AppTest | |
| assertTrue( true ); | |
| } | |
| } | |
| +fail :D | |
| +fail :D | |
| +fail :D | |
| ktoso@dynames bisectfun @ (no branch) $ git bisect reset | |
| Previous HEAD position was 09a58fb... let it crash | |
| Switched to branch 'master' | |
| ktoso@dynames bisectfun @ master $ |
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