Fix the DVC-diff workflow

.github/workflows/dvc-diff.yml

@@ -58,6 +58,13 @@ jobs:
         awk 'NF==5 && NR>=7 && $2=="added" {print $4}' report.md > added_files.txt
         awk 'NF==5 && NR>=7 && $2=="modified" {print $4}' report.md > modified_files.txt
 
+        # Backup the new images in the "baseline-new" directory
+        mkdir pygmt/tests/baseline-new
+        cp pygmt/tests/baseline/*.png pygmt/tests/baseline-new
+        # Pull images in the main branch from cloud storage
+        git checkout main
+        dvc pull --remote upstream
+
         # Append each image to the markdown report
         echo -e "## Image diff(s)\n" >> report.md
         echo -e "<details>\n" >> report.md
@@ -66,35 +73,21 @@ jobs:
         echo -e "### Added images\n" >> report.md
         while IFS= read -r line; do
           echo -e "- $line \n" >> report.md
-          cml-publish --title $line --md "$line" >> report.md < /dev/null
+          echo -e "![](${line/baseline/baseline-new})" >> report.md
         done < added_files.txt
 
         # Modified images
         echo -e "### Modified images\n" >> report.md
-        # Upload new images
-        while IFS= read -r line; do
-          cml-publish --title $line --md "$line" >> modified_images_new.md < /dev/null
-        done < modified_files.txt
-
-        # Pull images in the main branch from cloud storage
-        git checkout main
-        dvc pull --remote upstream
-        # Upload old images
-        while IFS= read -r line; do
-          cml-publish --title $line --md "$line" >> modified_images_old.md < /dev/null
-        done < modified_files.txt
-
-        # Append image report for modified images
         echo -e "| Path | Old | New |" >> report.md
         echo -e "|---|---|---|" >> report.md
-        paste modified_files.txt modified_images_old.md modified_images_new.md -d"|" |
-          awk -F"|" 'function basename(file) {sub(".*/", "", file); return file} {printf("| %s | %s | %s |\n",  basename($1), $2, $3)}' >> report.md
-
+        awk -F"|" 'function basename(file) {sub(".*/", "", file); return file} {printf("| %s | ![](%s) | ![](%s) |\n",  basename($1), $2, $3)}' modified_files.txt >> report.md
         echo -e "</details>\n" >> report.md
 
         # Mention git commit SHA in the report
         echo -e "Report last updated at commit ${{ github.event.pull_request.head.sha }}" >> report.md
 
+        cml comment update report.md
+
         # Save the report content to the output parameter 'report'
         echo 'report<<EOF' >> $GITHUB_OUTPUT
         cat report.md >> $GITHUB_OUTPUT