create tag with python

.github/workflows/build_base_image.yml

@@ -16,23 +16,20 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: Set image tag
-      shell: bash
+      shell: python
       run: |
-        IFS=$'\n' 
-        read -d '' -r -a lines < .tool-versions
-        erlang_line="${lines[0]}"
-        ruby_line="${lines[1]}"
-        echo $erlang_line
-        echo $ruby_line
-        echo 'HERE 1'
-        erlang=(${erlang_line// / })
-        echo $erlang
-        echo 'HERE 2'
-        ruby=(${ruby_line// / })
-        ERLANG_VER=${erlang[1]}
-        RUBY_VER=${ruby[1]}
-        echo $ERLANG_VER
-        echo "TAG=internetee/erlang-ruby:'$ERLANG_VER'-'$RUBY_VER'" >> $GITHUB_ENV
+        import os
+        versions = {}
+        try:
+            with open(".tool-versions", "r") as f:
+                for line in f:
+                (key, val) = line.split()
+                versions[key] = val
+        except:
+            print("Something is not right")
+        print("internetee/erlang-ruby:" + versions["erlang"] + "-" + versions["ruby"])
+        print(os.environ["GITHUB_ENV"])
+        #echo "TAG=internetee/erlang-ruby:'$ERLANG_VER'-'$RUBY_VER'" >> $GITHUB_ENV
 
     - name: Build image
       run: |