Fix input.default type and change them to string

README.md

@@ -77,7 +77,6 @@ When Git 2.18 or higher is not in your PATH, falls back to the REST API to downl
 
     # Do a sparse checkout on given patterns. Each pattern should be separated with
     # new lines
-    # Default: null
     sparse-checkout: ''
 
     # Specifies whether to use cone-mode when doing a sparse checkout.

action.yml

@@ -44,36 +44,35 @@ inputs:
       Whether to perform strict host key checking. When true, adds the options `StrictHostKeyChecking=yes`
       and `CheckHostIP=no` to the SSH command line. Use the input `ssh-known-hosts` to
       configure additional hosts.
-    default: true
+    default: "true"
   persist-credentials:
     description: 'Whether to configure the token or SSH key with the local git config'
-    default: true
+    default: "true"
   path:
     description: 'Relative path under $GITHUB_WORKSPACE to place the repository'
   clean:
     description: 'Whether to execute `git clean -ffdx && git reset --hard HEAD` before fetching'
-    default: true
+    default: "true"
   sparse-checkout:
     description: >
       Do a sparse checkout on given patterns.
       Each pattern should be separated with new lines
-    default: null
   sparse-checkout-cone-mode:
     description: >
       Specifies whether to use cone-mode when doing a sparse checkout.
-    default: true
+    default: "true"
   fetch-depth:
     description: 'Number of commits to fetch. 0 indicates all history for all branches and tags.'
-    default: 1
+    default: "1"
   fetch-tags:
     description: 'Whether to fetch tags, even if fetch-depth > 0.'
-    default: false
+    default: "false"
   show-progress:
     description: 'Whether to show progress status output when fetching.'
-    default: true
+    default: "true"
   lfs:
     description: 'Whether to download Git-LFS files'
-    default: false
+    default: "false"
   submodules:
     description: >
       Whether to checkout submodules: `true` to checkout submodules or `recursive` to
@@ -82,10 +81,10 @@ inputs:
 
       When the `ssh-key` input is not provided, SSH URLs beginning with `git@github.com:` are
       converted to HTTPS.
-    default: false
+    default: "false"
   set-safe-directory:
     description: Add repository path as safe.directory for Git global config by running `git config --global --add safe.directory <path>`
-    default: true
+    default: "true"
   github-server-url:
     description: The base URL for the GitHub instance that you are trying to clone from, will use environment defaults to fetch from the same instance that the workflow is running from unless specified. Example URLs are https://github.com or https://my-ghes-server.example.com
     required: false