Read audit/outdated output from files in the run mode

This action has two separate ways of reading the importmap output: from
a file, mostly for testing, and from running `importmap` directly.

This commit simplifies that by adding a first step that saves the
importmap outputs in textfiles, so it can be read in the following step.
That removes the need for having two separate ways, so the code is now
combined.

Author: neilvcarvalho

.github/workflows/integration.yml

@@ -17,9 +17,6 @@ jobs:
       - uses: actions/checkout@v6
 
       - uses: ruby/setup-ruby@v1
-        with:
-          bundler-cache: true
-
       - name: Create test Rails app
         run: |
           gem install rails --no-document

action.yml

@@ -40,6 +40,14 @@ inputs:
 runs:
   using: "composite"
   steps:
+    - name: Save importmap outputs
+      shell: bash
+      working-directory: ${{ inputs.rails-root }}
+      run: |
+        bundle install
+        bundle exec importmap audit 2>&1 | tee /tmp/importmap-audit.txt
+        bundle exec importmap outdated 2>&1 | tee /tmp/importmap-outdated.txt
+
     - name: Run importmap-update
       shell: bash
       working-directory: ${{ github.action_path }}
@@ -55,4 +63,7 @@ runs:
         IMPORTMAP_AUTHOR_EMAIL:   ${{ inputs.author-email }}
       run: |
         bundle install
-        bundle exec exe/importmap-update 2>&1 | tee "${IMPORTMAP_RUN_LOG:-/dev/null}"
+        bundle exec exe/importmap-update \
+          --outdated-file /tmp/importmap-outdated.txt \
+          --audit-file /tmp/importmap-audit.txt \
+          2>&1 | tee "${IMPORTMAP_RUN_LOG:-/dev/null}"

exe/importmap-update

@@ -79,7 +79,7 @@ def require_files!(opts, *keys)
   exit 2
 end
 
-def build_plan_from_files(opts, config)
+def build_plan(opts, config)
   outdated_output = File.read(opts[:outdated_file])
   audit_output = File.read(opts[:audit_file])
   outdated = Importmap::Update::Parsers::OutdatedParser.parse(outdated_output)
@@ -89,16 +89,6 @@ def build_plan_from_files(opts, config)
   ).call
 end
 
-def build_plan_from_live(config, runner)
-  outdated_result = runner.run("bin/importmap", "outdated")
-  audit_result = runner.run("bin/importmap", "audit")
-  outdated = Importmap::Update::Parsers::OutdatedParser.parse(outdated_result.stdout)
-  vulnerabilities = Importmap::Update::Parsers::AuditParser.parse(audit_result.stdout)
-  Importmap::Update::Planner.new(
-    outdated: outdated, vulnerabilities: vulnerabilities, config: config
-  ).call
-end
-
 def load_existing_prs_from_file(path)
   return [] if path.nil? || !File.exist?(path)
   raw = YAML.safe_load_file(path, permitted_classes: [], aliases: false) || []
@@ -117,7 +107,7 @@ when :print_config
 
 when :print_plan
   require_files!(options, :outdated_file, :audit_file)
-  plan = build_plan_from_files(options, config)
+  plan = build_plan(options, config)
   puts({
     "pr_specs" => plan.pr_specs.map { |s|
       {
@@ -134,7 +124,7 @@ when :print_plan
 
 when :print_actions
   require_files!(options, :outdated_file, :audit_file)
-  plan = build_plan_from_files(options, config)
+  plan = build_plan(options, config)
   existing_prs = load_existing_prs_from_file(options[:existing_prs_file])
   result = Importmap::Update::Reconciler.new(plan: plan, existing_prs: existing_prs).call
   puts({
@@ -151,6 +141,8 @@ when :print_actions
   }.to_yaml)
 
 when :run
+  require_files!(options, :outdated_file, :audit_file)
+
   repo = ENV["GITHUB_REPOSITORY"]
   if repo.nil? || repo.empty?
     warn "GITHUB_REPOSITORY is not set; refusing to run."
@@ -172,7 +164,7 @@ when :run
     author_email: ENV.fetch("IMPORTMAP_AUTHOR_EMAIL", "github-actions[bot]@users.noreply.github.com")
   )
 
-  plan = build_plan_from_live(config, runner)
+  plan = build_plan(options, config)
   existing_prs = gh.list_open_prs(branch_prefix: config.branch_prefix)
   reconciled = Importmap::Update::Reconciler.new(plan: plan, existing_prs: existing_prs).call