From 3302d1590f9e4c4d6a68913a762c0e444fccc700 Mon Sep 17 00:00:00 2001
From: David Bauer <mail@david-bauer.net>
Date: Wed, 15 Nov 2023 19:29:13 +0100
Subject: [PATCH] initial commit

Signed-off-by: David Bauer <mail@david-bauer.net>
---
 .github/workflows/lint.yml | 32 ++++++++++++++++++++++++++++++++
 README.md                  | 33 +++++++++++++++++++++++++++++++++
 action.yml                 | 35 +++++++++++++++++++++++++++++++++++
 entrypoint.sh              | 34 ++++++++++++++++++++++++++++++++++
 4 files changed, 134 insertions(+)
 create mode 100644 .github/workflows/lint.yml
 create mode 100644 README.md
 create mode 100644 action.yml
 create mode 100755 entrypoint.sh

diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 0000000..787c08c
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,32 @@
+---
+name: "Lint"
+
+# yamllint disable-line rule:truthy
+on: [push, pull_request]
+
+jobs:
+  lint-yaml:
+    name: "YAML"
+    runs-on: ubuntu-22.04
+    env:
+      YAML_FILES: |
+        .github/workflows/lint.yml
+        action.yml
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Dependencies
+        run: sudo apt-get update && sudo apt-get install -y yamllint shellcheck
+      - name: Validate YAML Files
+        run: yamllint $YAML_FILES
+
+  shellcheck:
+    name: "Shell Scripts"
+    runs-on: ubuntu-22.04
+    env:
+      SHELL_FILES: entrypoint.sh
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Dependencies
+        run: sudo apt-get update && sudo apt-get install -y shellcheck
+      - name: Validate Shell Scripts
+        run: shellcheck $SHELL_FILES
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..418e534
--- /dev/null
+++ b/README.md
@@ -0,0 +1,33 @@
+# action-target-list
+
+This Action allows to obtain a list of targets available for a
+given Gluon release.
+
+The target-list is returned as a JSON, so it can be used with
+a matrix-strategy for building multiple concurrent targets
+in a CI.
+
+
+## Inputs
+
+### gluon-path
+Path to a checked-out Gluon repository.
+
+### allowlist
+Space-separated list of targets which are allowed in the output list.
+
+Any target not present in this list won't occur in the output list.
+
+### denylist
+Space-separated list of targets which are not allowed in the output list.
+
+Any target present in this list won't occur in the output list.
+
+### broken
+Whether or not to include targets marked as `BROKEN` in the output list.
+
+
+## Outputs
+
+### targets
+JSON list containing all valid targets
diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..c67b353
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,35 @@
+---
+name: 'Get list of available targets for Gluon release'
+description: 'Returns targets available in a specified Gluon release'
+inputs:
+  gluon-path:
+    description: 'Path to Gluon repository'
+    required: true
+  allowlist:
+    description: 'Space-separated list of targets to be returned if available'
+    required: false
+  denylist:
+    description: |
+      'Space-separated list of targets to be excluded from the result'
+    required: false
+  broken:
+    description: 'Determines if BROKEN targets should be returned (Default: 0)'
+    default: 0
+outputs:
+  targets:
+    description: 'JSON list containing all valid targets'
+    value: ${{ steps.save-step.outputs.targets }}
+runs:
+  using: 'composite'
+  steps:
+    - run: >
+        bash ${{ github.action_path }}/entrypoint.sh
+        ${{ inputs.gluon-path }} > /tmp/targets.json
+      shell: bash
+      env:
+        ALLOWLIST: ${{ inputs.allowlist }}
+        DENYLIST: ${{ inputs.denylist }}
+        BROKEN: ${{ inputs.broken }}
+    - run: echo "targets=$(cat /tmp/targets.json)" >> "$GITHUB_OUTPUT"
+      shell: bash
+      id: save-step
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100755
index 0000000..7fde83d
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+set -euxo pipefail
+
+GLUON_PATH="$1"
+
+ALLOWLIST="${ALLOWLIST:-}"
+DENYLIST="${DENYLIST:-}"
+BROKEN="${BROKEN:0}"
+
+# Get List of available Targets
+AVAILABLE_TARGETS_NEWLINE="$(make --no-print-directory -C "$GLUON_PATH" list-targets "BROKEN=${BROKEN}" "GLUON_SITEDIR=docs/site-example")"
+
+# Format Allow- and Denylist
+TARGET_ALLOWLIST_NEWLINE="$(echo "$ALLOWLIST" | tr ' ' '\n')"
+TARGET_DENYLIST_NEWLINE="$(echo "$DENYLIST" | tr ' ' '\n')"
+
+# Return all available targets if no allowlist is set
+OUTPUT_TARGETS="${AVAILABLE_TARGETS_NEWLINE}"
+
+if [ -n "$ALLOWLIST" ]; then
+    # Only return words present in both lists
+    OUTPUT_TARGETS="$(echo -e "$AVAILABLE_TARGETS_NEWLINE\n$TARGET_ALLOWLIST_NEWLINE" | sort | uniq -d)"
+fi
+
+if [ -n "$DENYLIST" ]; then
+    # Remove words present in denylist
+    OUTPUT_TARGETS="$(echo -e "$OUTPUT_TARGETS\n$TARGET_DENYLIST_NEWLINE" | sort | uniq -u)"
+fi
+
+# Convert to JSON
+OUTPUT_JSON="$(echo "$OUTPUT_TARGETS" | jq  --raw-input .  | jq --slurp . | jq -c .)"
+
+echo "$OUTPUT_JSON"