DM-46158: Add schema comparison workflow

.github/workflows/compare.yaml

@@ -0,0 +1,70 @@
+name: Compare Schemas for Changes
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "*"
+  pull_request:
+
+jobs:
+  compare:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v4
+        with:
+          path: current-ref
+
+      - name: Fetch origin main
+        working-directory: current-ref
+        run: git fetch origin main
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: "pip"
+
+      - name: Install dependencies
+        working-directory: current-ref
+        run: |
+          python -m pip install --upgrade pip uv
+          uv pip install --system -r requirements.txt
+
+      - name: Set relative path to schema directory
+        run: |
+          echo "SCHEMA_DIR=python/lsst/sdm_schemas/schemas" >> $GITHUB_ENV
+
+      - name: Get list of changed YAML files
+        working-directory: current-ref
+        run: |
+          CHANGED_FILES=$(git diff --name-only origin/main..HEAD -- ${{ env.SCHEMA_DIR }} | sed "s|^${{ env.SCHEMA_DIR }}/||")
+          echo "Changed YAML files: $CHANGED_FILES"
+          echo "CHANGED_FILES=$CHANGED_FILES" >> $GITHUB_ENV
+
+      - name: Check out main branch
+        uses: actions/checkout@v4
+        with:
+          ref: main
+          path: main-branch
+
+      - name: Run schema comparison with deepdiff
+        run: |
+          for file in ${{ env.CHANGED_FILES }}; do
+            echo "Comparing $file:"
+            MAIN_FILE=main-branch/${{ env.SCHEMA_DIR }}/$file
+            CURRENT_FILE=current-ref/${{ env.SCHEMA_DIR }}/$file
+            felis --log-level ERROR diff -c deepdiff $MAIN_FILE $CURRENT_FILE
+          done
+
+      - name: Run schema comparison with alembic
+        run: |
+          for file in ${{ env.CHANGED_FILES }}; do
+            echo "Comparing $file:"
+            MAIN_FILE=main-branch/${{ env.SCHEMA_DIR }}/$file
+            CURRENT_FILE=current-ref/${{ env.SCHEMA_DIR }}/$file
+            felis --log-level ERROR diff -c alembic $MAIN_FILE $CURRENT_FILE
+          done

python/lsst/sdm_schemas/schemas/dp02_dc2.yaml

@@ -3,7 +3,7 @@ name: dp02_dc2_catalogs
 "@id": "#dp02_dc2_catalogs"
 description: "Data Preview 0.2 contains the image and catalog products of the Rubin Science
   Pipelines v23 processing of the DESC Data Challenge 2 simulation, which covered 300 square
-  degrees of the wide-fast-deep LSST survey region over 5 years."
+  degrees of the wide-fast-deep LSST survey region over 5 years (dummy change)."
 tables:
 - name: Object
   "@id": "#Object"
@@ -8053,3 +8053,8 @@ tables:
     tap:column_index: 999
     tap:principal: 1
     description: 1 for galaxies, 2 for stars, and 3 for SNe
+  - name: dummy_column
+    '@id': '#TruthSummary.dummy_column'
+    datatype: string
+    length: 256
+    description: Dummy column for schema comparison testing

requirements.txt

@@ -1,4 +1,4 @@
-lsst-felis @ git+http://github.com/lsst/felis.git@main
+lsst-felis @ git+http://github.com/lsst/felis.git@tickets/DM-46130
 
 click
 pyyaml