Add some details on weekly preview build process (#1494)

Stop build if the tag format is wrong

Signed-off-by: Isaac Yang <[email protected]>

Author: IsaacYangSLA

.github/workflows/weekly-preview.yml

@@ -24,12 +24,16 @@ jobs:
         sed -i 's/name\ =\ monai$/name\ =\ monai-weekly/g' setup.cfg
         echo "__commit_id__ = \"$HEAD_COMMIT_ID\"" >> monai/__init__.py
         git diff setup.cfg monai/__init__.py
-        # build tar.gz and wheel
         git config user.name "CI Builder"
         git config user.email "[email protected]"
         git add setup.cfg monai/__init__.py
         git commit -m "Weekly build at $HEAD_COMMIT_ID"
-        git tag 0.5.dev$(date +'%y%U')
+        export YEAR_WEEK=$(date +'%y%U')
+        echo "Year week for tag is ${YEAR_WEEK}"
+        if ! [[ $YEAR_WEEK =~ ^[0-9]{4}$ ]] ; then echo "Wrong 'year week' format.  Should be 4 digits."; exit 1 ; fi
+        git tag "0.5.dev${YEAR_WEEK}"
+        git log -1
+        git tag --list
         python setup.py sdist bdist_wheel
 
     - name: Publish to PyPI