feat(volume-mount): mount docker volumes as input (#797)

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

README.md

@@ -13,6 +13,7 @@ GitHub Action to run Renovate self-hosted.
   - [`configurationFile`](#configurationfile)
   - [`docker-cmd-file`](#docker-cmd-file)
   - [`docker-user`](#docker-user)
+  - [`docker-volumes`](#docker-volumes)
   - [`env-regex`](#env-regex)
   - [`mount-docker-socket`](#mount-docker-socket)
   - [`token`](#token)
@@ -114,6 +115,31 @@ Specify a user (or user-id) to run docker command.
 You can use it with [`docker-cmd-file`](#docker-cmd-file) in order to start the
 image as root, do some customization and switch back to a unprivileged user.
 
+### `docker-volumes`
+
+Specify volume mounts. Defaults to `/tmp:/tmp`.
+The volume mounts are separated through `;`.
+
+This sample will mount `/tmp:/tmp`, `/home:/home` and `/foo:/bar`.
+
+```yml
+....
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3.5.3
+      - name: Self-hosted Renovate
+        uses: renovatebot/github-action@v39.1.3
+        with:
+          token: ${{ secrets.RENOVATE_TOKEN }}
+          docker-volumes: |
+            /tmp:/tmp ;
+            /home:/home ;
+            /foo:/bar
+```
+
 ### `env-regex`
 
 Allows to configure the regex to define which environment variables are passed to the renovate container.

action.yml

@@ -44,6 +44,11 @@ inputs:
     description: |
       Docker user. Default to an unprivileged user
     required: false
+  docker-volumes:
+    description: |
+      Docker volume mounts. Default to /tmp:/tmp
+    default: /tmp:/tmp
+    required: false
 
 runs:
   using: node16

src/input.ts

@@ -82,6 +82,14 @@ class Input {
     return core.getInput('docker-user') || null;
   }
 
+  getDockerVolumeMounts(): string[] {
+    return core
+      .getInput('docker-volumes')
+      .split(';')
+      .map((v) => v.trim())
+      .filter((v) => !!v);
+  }
+
   /**
    * Convert to environment variables.
    *

src/renovate.ts

@@ -53,7 +53,11 @@ class Renovate {
       dockerArguments.push(`--user ${dockerUser}`);
     }
 
-    dockerArguments.push('--volume /tmp:/tmp', '--rm', this.docker.image());
+    for (const volumeMount of this.input.getDockerVolumeMounts()) {
+      dockerArguments.push(`--volume ${volumeMount}`);
+    }
+
+    dockerArguments.push('--rm', this.docker.image());
 
     if (dockerCmd !== null) {
       dockerArguments.push(dockerCmd);