Make Pkg.develop step optional (#18)

README.md

@@ -49,3 +49,13 @@ In that case, you can add an input called `prefix` containing the command that w
         with:
           prefix: xvfb-run
 ```
+
+### Customizing installation of package into docs environment
+
+In some packages, you may want to install the package yourself into the docs environment. For example, if the package is in a subdirectory (but the docs environment is still top-level). In this case, you can pass `install-package: false`.
+
+```yaml
+      - uses: julia-actions/julia-docdeploy@v1
+        with:
+          install-package: false
+```

action.yml

@@ -11,7 +11,11 @@ inputs:
     description: 'Value inserted in front of the julia command, e.g. for running xvfb-run julia [...]'
     default: ''
     required: false
-
+  install-package:
+    description: 'Whether or not to install the package with `Pkg.develop` into the `docs` environment'
+    default: true
+    required: false
+
 runs:
   using: 'composite'
   steps:
@@ -32,6 +36,7 @@ runs:
         # Run the Julia command
         "${julia_cmd[@]}"
       shell: bash
+      if: ${{ inputs.install-package }}
     - run: |
         # The Julia command that will be executed
         julia_cmd=( julia --color=yes --project=docs/ -e '