Meta: add yet phrase checking using ESMeta

.github/workflows/esmeta-installer/action.yml

@@ -0,0 +1,32 @@
+name: 'install esmeta'
+
+runs:
+  using: "composite"
+  steps:
+    - name: setup JDK
+      uses: actions/setup-java@v4
+      with:
+        distribution: temurin
+        java-version: 17
+    - name: setup SBT
+      uses: sbt/setup-sbt@v1
+    - name: set esmeta version and path
+      shell: bash
+      run: |
+        echo "ESMETA_VERSION=v0.7.1" >> $GITHUB_ENV
+        echo "ESMETA_HOME=vendor/esmeta" >> $GITHUB_ENV
+    - name: clone esmeta
+      shell: bash
+      run: |
+        mkdir -p "${ESMETA_HOME}"
+        git clone --branch $ESMETA_VERSION --depth 1 https://github.com/es-meta/esmeta.git "${ESMETA_HOME}"
+    - name: build esmeta
+      shell: bash
+      run: |
+        cd "${ESMETA_HOME}"
+        sbt assembly
+    - name: link ecma262
+      shell: bash
+      run: |
+        rmdir "${ESMETA_HOME}"/ecma262 \
+          && ln -s "$(pwd)" "${ESMETA_HOME}"/ecma262

.github/workflows/esmeta-typecheck.yml

@@ -6,36 +6,11 @@ jobs:
   esmeta-typecheck:
     name: 'esmeta typecheck'
     runs-on: ubuntu-22.04
-
-    env:
-      ESMETA_HOME: vendor/esmeta
-
     steps:
-      - name: Checkout
+      - name: checkout
         uses: actions/checkout@v4
-      - name: Setup JDK
-        uses: actions/setup-java@v4
-        with:
-          distribution: temurin
-          java-version: 17
-      - name: Setup SBT
-        uses: sbt/setup-sbt@v1
-      - name: download esmeta
-        run: |
-          mkdir -p "${ESMETA_HOME}"
-          cd "${ESMETA_HOME}"
-          git init
-          git remote add origin https://github.com/es-meta/esmeta.git
-          git fetch --depth 1 origin bd58590ef6badabbe71afdefa02dc32274902621 ;# v0.7.1
-          git checkout FETCH_HEAD
-      - name: build esmeta
-        run: |
-          cd "${ESMETA_HOME}"
-          sbt assembly
-      - name: link
-        run: |
-          rmdir "${ESMETA_HOME}"/ecma262 \
-            && ln -s "$(pwd)" "${ESMETA_HOME}"/ecma262
+      - name: install esmeta
+        uses: ./.github/workflows/esmeta-installer
       - name: typecheck
         run: '"${ESMETA_HOME}"/bin/esmeta tycheck -status -extract:log -tycheck:log -tycheck:ignore=esmeta-ignore.json'
       - name: create logs archive

.github/workflows/esmeta-yetcheck.yml

@@ -0,0 +1,49 @@
+name: 'esmeta yet phrases detection'
+
+on: [pull_request]
+
+jobs:
+  esmeta-yetcheck:
+    name: 'esmeta yet phrases detection'
+    runs-on: ubuntu-22.04
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: install esmeta
+        uses: ./.github/workflows/esmeta-installer
+      - name: list added line numbers
+        id: collect
+        shell: bash
+        env:
+          FILE_PATH: spec.html
+          BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          HEAD_SHA: ${{ github.sha }}
+        run: |
+          # zero-context diff, limited to the file we care about
+          added_lines=$(git diff -U0 --no-color "${BASE_SHA}" "${HEAD_SHA}" -- "${FILE_PATH}" |
+          # keep only the hunk headers (the @@ lines)
+          awk '
+            # Example header: @@ -158,0 +159,2 @@
+            /^@@/ {
+              # Extract “+<start>[,<count>]” part
+              match($0, /\+([0-9]+)(,([0-9]+))?/, a)
+              start = a[1]
+              count = (a[3] == "" ? 1 : a[3])
+              # Print every line number in the added range
+              for (i = 0; i < count; i++) print start + i
+            }
+          ')
+
+          # Join line numbers with comma or space (whichever format you need)
+          added_joined=$(echo "$added_lines" | paste -sd "," -)
+          added_lines_json="[$added_joined]"
+
+          # Set it as an output value
+          echo "added_lines=$added_lines_json" >> "$GITHUB_OUTPUT"
+      - name: check for newly-introduced phrases
+        run: |
+          "${ESMETA_HOME}"/bin/esmeta extract \
+            -status \
+            -extract:warn-action <<< ${{ steps.collect.outputs.added_lines }}