add convert_prefix

README.md

@@ -111,6 +111,33 @@ steps:
 - run: echo "Value of PREFIXED_MY_SECRET: $PREFIXED_MY_SECRET"
 ```
 
+**Only export secrets that start with a given string:**
+
+```yaml
+steps:
+- uses: actions/checkout@v3
+- uses: oNaiPs/secrets-to-env-action@v1
+  with:
+    secrets: ${{ toJSON(secrets) }}
+    starts_with: PREFIX_
+- run: env
+# observe that only vars with PREFIX_ were exported
+```
+
+**Only apply string conversions (see below) for secrets that start with a given string:**
+
+```yaml
+steps:
+- uses: actions/checkout@v3
+- uses: oNaiPs/secrets-to-env-action@v1
+  with:
+    secrets: ${{ toJSON(secrets) }}
+    starts_with: PREFIX_
+    starts_with_convert_prefix: false
+    convert: lower
+- run: env | grep 'PREFIX_'
+```
+
 **Convert:**
 
 Converts all exported secrets according to a [template](https://github.com/blakeembrey/change-case#core).

action.yml

@@ -20,6 +20,9 @@ inputs:
   starts_with:
     required: false
     description: 'Only export secrets that start with the provided string'
+  starts_with_convert_prefix:
+    required: false
+    description: 'When used with starts_with, only convert the non-matching part of the secret name'
 runs:
   using: 'node16'
   main: 'dist/index.js'

src/main.ts

@@ -29,6 +29,7 @@ async function run(): Promise<void> {
     const excludeListStr: string = core.getInput('exclude')
     const convert: string = core.getInput('convert')
     const startsWith: string = core.getInput('starts_with')
+    const startsWithConvertPrefix = core.getInput('starts_with_convert_prefix')
 
     let secrets: Record<string, string>
     try {
@@ -79,7 +80,13 @@ with:
             ).join(', ')}`
           )
         }
-        newKey = convertTypes[convert](newKey)
+        if (startsWith && startsWithConvertPrefix === 'false') {
+          newKey = `${startsWith}${convertTypes[convert](
+            newKey.replace(startsWith, '')
+          )}`
+        } else {
+          newKey = convertTypes[convert](newKey)
+        }
       }
 
       if (process.env[newKey]) {