Add readme

Author: Michael Henderson

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           input-file: 'package.json'
           input-property: 'author.name' # Exp: 'fiddlermikey'
-      - name: read the variable
+      - name: Display property value for input-property in input-file
         id: write
         run: echo "The value for ${{ steps.read.outputs.output-property }} is ${{ steps.read.outputs.output-value }}"
 

README.md

@@ -0,0 +1,35 @@
+# Assign workflow properties from json
+
+This action is designed to read a json file and set workflow variables using properties defined in the json file
+
+## Inputs
+
+### `input-property`
+
+**Required** The identifier of the json property to be evaluated
+
+## Outputs
+
+### `output-value`
+
+The value from the json property
+
+## Example usage
+
+```yaml
+jobs:
+  assign-from-json:
+    runs-on: ubuntu-latest
+    name: A test job to read a value from json as a variable
+    steps:
+      - name: Read a json file 
+        uses: ./
+        id: read
+        with:
+          input-file: 'package.json'
+          input-property: 'author.name' # Exp: 'fiddlermikey'
+      - name: Display property value for input-property in input-file
+        id: write
+        run: echo "The value for ${{ steps.read.outputs.output-property }} is ${{ steps.read.outputs.output-value }}"
+
+```