How to deploy only modified/new files GIT+Jenkins+PHP?

Question

I am trying to use Jenkins CI server for my PHP application. As we are using our Git repository so i am using jenkins's git plugin to take files from central repo.

Currently when my jenkins job runs it takes files from git repo & make a build but that build contains all the files.

As per my current scenario i only want modified+new files in that build.So that i can deploy only them not the whole bunch of files.

Is this possible somehow..or it is fundamentally wrong in build environments..?

Answer 1

You need two things: The commit of the previous build and then the changed files between the previous build commit and current HEAD.

For the first: There might be ways to find the commit from Jenkins via the REST API (as it does display it in the build page. But I think it will be easier if you put the git commit into a file and archive it as a build artifact. Then you can use Copy Build artifacts plugin to get the file from the previous build.

For the second: Maybe you can use git diff --name-status HEAD

To tie all of this together:

Set up the build to Copy artifacts from the same job, last successful build.

Assuming the file where you store the commit id is called "commit_id", set a build step to run something like:

git diff --name-status `cat commit_id` HEAD |
while read status file; do
    case $status in
    D)   echo "$file was deleted" ;; # deploy (or ignore) file deletion here
    A|M) echo "$file was added or modified" ;; # deploy file modification here
    esac
done
# record this commit to be archived
git describe > commit_id

In the post build actions, configure the job to archive the file commit_id.