Add ruby-image option

Author: toote

README.md

@@ -65,6 +65,12 @@ Default: `0`
 
 Include the specified number of slowest tests in the annotation. The annotation will always be shown.
 
+### `ruby-image` (optional)
+
+The docker image to use for running the analysis code. Must be a valid image reference that can run the corresponding ruby code and the agent running the step must be able to pull it if not already present.
+
+Default: `ruby:3.1-alpine@sha256:a39e26d0598837f08c75a42c8b0886d9ed5cc862c4b535662922ee1d05272fca`
+
 ## Developing
 
 To test the plugin hooks (in Bash) and the junit parser (in Ruby):

hooks/command

@@ -9,6 +9,7 @@ fi
 
 PLUGIN_DIR="$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)/.."
 MAX_SIZE=1024 # in KB
+RUBY_IMAGE="${BUILDKITE_PLUGIN_JUNIT_ANNOTATE_RUBY_IMAGE:-'ruby:3.1-alpine@sha256:a39e26d0598837f08c75a42c8b0886d9ed5cc862c4b535662922ee1d05272fca'}"
 
 artifacts_dir="$(pwd)/$(mktemp -d "junit-annotate-plugin-artifacts-tmp.XXXXXXXXXX")"
 annotation_dir="$(pwd)/$(mktemp -d "junit-annotate-plugin-annotation-tmp.XXXXXXXXXX")"
@@ -49,7 +50,7 @@ docker \
     --env "BUILDKITE_PLUGIN_JUNIT_ANNOTATE_JOB_UUID_FILE_PATTERN=${BUILDKITE_PLUGIN_JUNIT_ANNOTATE_JOB_UUID_FILE_PATTERN:-}" \
     --env "BUILDKITE_PLUGIN_JUNIT_ANNOTATE_FAILURE_FORMAT=${BUILDKITE_PLUGIN_JUNIT_ANNOTATE_FAILURE_FORMAT:-}" \
     --env "BUILDKITE_PLUGIN_JUNIT_ANNOTATE_REPORT_SLOWEST=${BUILDKITE_PLUGIN_JUNIT_ANNOTATE_REPORT_SLOWEST:-}" \
-    ruby:2.7-alpine ruby /src/bin/annotate /junits \
+    "${RUBY_IMAGE}" ruby /src/bin/annotate /junits \
       > "$annotation_path"
 
 exit_code=$?

plugin.yml

@@ -22,6 +22,8 @@ configuration:
       type: string
     report-slowest:
       type: integer
+    ruby-image:
+      type: string
   required:
     - artifacts
   additionalProperties: false