Version selection: add AWS redirect configs for latest docs version

.github/workflows/deploy-book.yml

@@ -35,19 +35,13 @@ jobs:
           if [[ $GITHUB_REF =~ ^refs/heads/(master|[0-9][0-9.]+)$ ]]; then
             echo "::set-output name=branch::${BASH_REMATCH[1]}"
           fi
-      - name: Build versions file
-        if: github.event_name == 'push' && steps.branch.outputs.branch != null
-        run: scripts/docs-versions.sh origin | tee /dev/stderr > versions.json
       - name: Configure AWS Credentials
-        if: github.event_name == 'push' && steps.branch.outputs.branch != null
+        if: github.event_name == 'push' && steps.branch.outputs.branch != null && github.repository == 'crystal-lang/crystal-book'
         uses: aws-actions/configure-aws-credentials@v1
         with:
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           aws-region: us-east-1
       - name: Deploy book
-        if: github.event_name == 'push' && steps.branch.outputs.branch != null
+        if: github.event_name == 'push' && steps.branch.outputs.branch != null && github.repository == 'crystal-lang/crystal-book'
         run: aws s3 sync ./site s3://crystal-book/reference/${{ steps.branch.outputs.branch }} --delete
-      - name: Deploy versions file
-        if: github.event_name == 'push' && steps.branch.outputs.branch != null
-        run: aws s3 sync . s3://crystal-book/reference --exclude '*' --include 'versions.json'

.github/workflows/deploy-config.yml

@@ -0,0 +1,27 @@
+name: Deploy config
+on:
+  push:
+    branches:
+      - '[0-9]+.[0-9]+'
+
+jobs:
+  build:
+    name: Deploy config
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download source
+        uses: actions/checkout@v2
+      - name: Build versions files
+        run: |
+          scripts/docs-versions.sh origin
+          grep '' versions.json .aws-config  # Display the files
+      - name: Configure AWS Credentials
+        if: github.repository == 'crystal-lang/crystal-book'
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: us-east-1
+      - name: Deploy versions files
+        if: github.repository == 'crystal-lang/crystal-book'
+        run: aws s3 sync . s3://crystal-book/reference --exclude '*' --include 'versions.json' --include '.aws-config'

scripts/docs-versions.sh

@@ -1,12 +1,50 @@
-#!/usr/bin/env sh
-set -e
+#!/bin/bash
+set -eu
 
-printf '['
-latest='"latest"'
-for ver in $(git ls-remote --heads "${1:-.}" | grep -P -o '(?<=refs/heads/)[0-9][0-9.]+' | sort -V -r); do
-  printf '{"version": "%s", "title": "%s", "aliases": [%s]}, ' "$ver" "$ver" "$latest"
-  latest=''
-done
-printf '{"version": "master", "title": "nightly", "aliases": []}'
-printf ']'
-test -z "$latest"  # Check that we wrote at least one version
+branches=( $(git ls-remote --heads "${1:-.}" | grep -P -o '(?<=refs/heads/)[0-9][0-9.]+' | sort -V -r) )
+latest_branch="${branches[0]}"
+
+{
+  printf '[\n'
+  latest='"latest"'
+  for ver in "${branches[@]}"; do
+    printf '{"version": "%s", "title": "%s", "aliases": [%s]},\n' "$ver" "$ver" "$latest"
+    latest=''
+  done
+  printf '{"version": "master", "title": "nightly", "aliases": []}\n'
+  printf ']\n'
+  test -z "$latest"  # Check that we wrote at least one version
+} > versions.json
+
+cat <<EOF > .aws-config
+{
+  "IndexDocument": {
+    "Suffix": "index.html"
+  },
+  "RoutingRules": [
+    {
+      "Condition": {
+        "KeyPrefixEquals": "reference/latest/"
+      },
+      "Redirect": {
+        "HttpRedirectCode": "302",
+        "ReplaceKeyPrefixWith": "reference/${latest_branch}/",
+        "Protocol": "https",
+        "HostName": "crystal-lang.org"
+      }
+    },
+    {
+      "Condition": {
+        "KeyPrefixEquals": "reference/",
+        "HttpErrorCodeReturnedEquals": "404"
+      },
+      "Redirect": {
+        "HttpRedirectCode": "301",
+        "ReplaceKeyPrefixWith": "reference/latest/",
+        "Protocol": "https",
+        "HostName": "crystal-lang.org"
+      }
+    }
+  ]
+}
+EOF