I use Atlassian Bamboo version 8.1.3 build 80110. I have a simple bamboo.yaml consisting of 5 stages and 7 jobs. Bamboo git cache is disabled. When the plan is run for the first time I get:
simple 23-Aug-2023 13:49:04 Starting task 'Source Code Checkout' of type 'com.atlassian.bamboo.plugins.vcs:task.vcs.checkout'
simple 23-Aug-2023 13:49:04 Checking out into /home/bamboo/bamboo-agent-home/xml-data/build-dir/MY-PROJECT3-JOB6
simple 23-Aug-2023 13:49:04 Updating source code to revision: e75accf7010794ada8febc4db5282bdb43fa620d
simple 23-Aug-2023 13:49:04 Creating local git repository in '/home/bamboo/bamboo-agent-home/xml-data/build-dir/MY-PROJECT3-JOB6/.git'.
simple 23-Aug-2023 13:49:04 Initialized empty Git repository in /home/bamboo/bamboo-agent-home/xml-data/build-dir/MY-PROJECT3-JOB6/.git/
simple 23-Aug-2023 13:49:04 Fetching 'refs/heads/*' from 'ssh://git@git.server.com:7999/my/project.git'.
simple 23-Aug-2023 13:49:04 Warning: Permanently added '[127.0.0.1]:37601' (RSA) to the list of known hosts.
simple 23-Aug-2023 13:49:05 From ssh://127.0.0.1:37601/my/project
simple 23-Aug-2023 13:49:05 * [new branch] my-branch -> my-branch
simple 23-Aug-2023 13:49:05 * [new branch] master -> master
simple 23-Aug-2023 13:49:05 * [new tag] v1.0.0 -> v1.0.0
simple 23-Aug-2023 13:49:05 Checking out revision e75accf7010794ada8febc4db5282bdb43fa620d.
simple 23-Aug-2023 13:49:05 Switched to branch 'my-branch'
simple 23-Aug-2023 13:49:05 Updated source code to revision: e75accf7010794ada8febc4db5282bdb43fa620d
simple 23-Aug-2023 13:49:05 Finished task 'Source Code Checkout' with result: Success
When it's run for the second time on the same agent I get:
simple 11-Sep-2023 15:28:35 Starting task 'Source Code Checkout' of type 'com.atlassian.bamboo.plugins.vcs:task.vcs.checkout'
simple 11-Sep-2023 15:28:35 Checking out into /home/bamboo/bamboo-agent-home/xml-data/build-dir/MY-PROJECT3-JOB6
simple 11-Sep-2023 15:28:35 Updating source code to revision: e75accf7010794ada8febc4db5282bdb43fa620d
simple 11-Sep-2023 15:28:35 Creating local git repository in '/home/bamboo/bamboo-agent-home/xml-data/build-dir/MY-PROJECT3-JOB6/.git'.
simple 11-Sep-2023 15:28:35 Initialized empty Git repository in /home/bamboo/bamboo-agent-home/xml-data/build-dir/MY-PROJECT3-JOB6/.git/
simple 11-Sep-2023 15:28:35 Fetching 'refs/heads/*' from 'ssh://git@git.server.com:7999/my/project.git'.
simple 11-Sep-2023 15:28:35 Warning: Permanently added '[127.0.0.1]:45627' (RSA) to the list of known hosts.
simple 11-Sep-2023 15:28:35 From ssh://127.0.0.1:45627/my/project
simple 11-Sep-2023 15:28:35 * [new branch] my-branch -> my-branch
simple 11-Sep-2023 15:28:35 * [new branch] master -> master
simple 11-Sep-2023 15:28:35 * [new tag] v1.0.0 -> v1.0.0
simple 11-Sep-2023 15:28:35 Checking out revision e75accf7010794ada8febc4db5282bdb43fa620d.
simple 11-Sep-2023 15:28:35 Note: switching to 'e75accf7010794ada8febc4db5282bdb43fa620d'.
simple 11-Sep-2023 15:28:35
simple 11-Sep-2023 15:28:35 You are in 'detached HEAD' state. You can look around, make experimental
simple 11-Sep-2023 15:28:35 changes and commit them, and you can discard any commits you make in this
simple 11-Sep-2023 15:28:35 state without impacting any branches by switching back to a branch.
simple 11-Sep-2023 15:28:35
simple 11-Sep-2023 15:28:35 If you want to create a new branch to retain commits you create, you may
simple 11-Sep-2023 15:28:35 do so (now or later) by using -c with the switch command. Example:
simple 11-Sep-2023 15:28:35
simple 11-Sep-2023 15:28:35 git switch -c <new-branch-name>
simple 11-Sep-2023 15:28:35
simple 11-Sep-2023 15:28:35 Or undo this operation with:
simple 11-Sep-2023 15:28:35
simple 11-Sep-2023 15:28:35 git switch -
simple 11-Sep-2023 15:28:35
simple 11-Sep-2023 15:28:35 Turn off this advice by setting config variable advice.detachedHead to false
simple 11-Sep-2023 15:28:35
simple 11-Sep-2023 15:28:35 HEAD is now at e75accf Some commit message
simple 11-Sep-2023 15:28:35 Updated source code to revision: e75accf7010794ada8febc4db5282bdb43fa620d
simple 11-Sep-2023 15:28:35 Finished task 'Source Code Checkout' with result: Success
I wonder why does Bamboo enter detached state instead of creating a branch and checking out revision on it when the build is run for the second time? I thought it's maybe because branch already exists as mentioned here https://jira.atlassian.com/browse/BAM-20120?focusedId=1877088&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-1877088 but I use `clean-working-dir: true` and creating empty git repository succeeds. Is it documented somewhere?
Possibly related issues:
https://jira.atlassian.com/browse/BAM-14600
https://jira.atlassian.com/browse/BAM-20120
