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Diffstat (limited to 'Documentation/git-bisect.txt')
| -rw-r--r-- | Documentation/git-bisect.txt | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/Documentation/git-bisect.txt b/Documentation/git-bisect.txt index 0855b98b28..0b8b0ebba7 100644 --- a/Documentation/git-bisect.txt +++ b/Documentation/git-bisect.txt @@ -15,6 +15,7 @@ DESCRIPTION The command takes various subcommands, and different options depending on the subcommand: + git bisect help git bisect start [<bad> [<good>...]] [--] [<paths>...] git bisect bad [<rev>] git bisect good [<rev>...] @@ -29,6 +30,12 @@ This command uses 'git-rev-list --bisect' option to help drive the binary search process to find which change introduced a bug, given an old "good" commit object name and a later "bad" commit object name. +Getting help +~~~~~~~~~~~~ + +Use "git bisect" to get a short usage description, and "git bisect +help" or "git bisect -h" to get a long usage description. + Basic bisect commands: start, bad, good ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -217,6 +224,55 @@ tree to the pristine state. Finally the "run" script can exit with the status of the real test to let "git bisect run" command loop to know the outcome. +EXAMPLES +-------- + +* Automatically bisect a broken build between v1.2 and HEAD: ++ +------------ +$ git bisect start HEAD v1.2 -- # HEAD is bad, v1.2 is good +$ git bisect run make # "make" builds the app +------------ + +* Automatically bisect a broken test suite: ++ +------------ +$ cat ~/test.sh +#!/bin/sh +make || exit 125 # this "skip"s broken builds +make test # "make test" runs the test suite +$ git bisect start v1.3 v1.1 -- # v1.3 is bad, v1.1 is good +$ git bisect run ~/test.sh +------------ ++ +Here we use a "test.sh" custom script. In this script, if "make" +fails, we "skip" the current commit. ++ +It's safer to use a custom script outside the repo to prevent +interactions between the bisect, make and test processes and the +script. ++ +And "make test" should "exit 0", if the test suite passes, and +"exit 1" (for example) otherwise. + +* Automatically bisect a broken test case: ++ +------------ +$ cat ~/test.sh +#!/bin/sh +make || exit 125 # this "skip"s broken builds +~/check_test_case.sh # does the test case passes ? +$ git bisect start HEAD HEAD~10 -- # culprit is among the last 10 +$ git bisect run ~/test.sh +------------ ++ +Here "check_test_case.sh" should "exit 0", if the test case passes, +and "exit 1" (for example) otherwise. ++ +It's safer if both "test.sh" and "check_test_case.sh" scripts are +outside the repo to prevent interactions between the bisect, make and +test processes and the scripts. + Author ------ Written by Linus Torvalds <torvalds@osdl.org> |