Merge pull request #5 from cachix/no-signing-key

Support running as a PR

.github/workflows/test.yml

@@ -21,6 +21,12 @@ jobs:
         name: cachix-action
         file: test.nix
         signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+    - name: Test public cache no pushing
+      uses: ./
+      with:
+        name: cachix-action
+        file: test.nix
+        signingKey: ''
     - name: Test private cache
       uses: ./
       with:

action.yml

@@ -13,7 +13,6 @@ inputs:
     description: 'Authentication token for Cachix, needed only for private cache access'
   signingKey:
     description: 'Signing key secret retrieved after creating binary cache on https://cachix.org'
-    required: true
 branding:
   color: 'blue'
   icon: 'database'

src/main.ts

@@ -8,7 +8,7 @@ async function run() {
     const file = core.getInput('file');
     const attributes = core.getInput('attributes');
     const name = core.getInput('name', { required: true });
-    const signingKey = core.getInput('signingKey', { required: true });
+    const signingKey = core.getInput('signingKey');
     const authToken = core.getInput('authToken')
 
     core.startGroup('Installing Cachix')
@@ -25,7 +25,9 @@ async function run() {
     await exec.exec('cachix', ['use', name]);
     core.endGroup()
 
-    core.exportVariable('CACHIX_SIGNING_KEY', signingKey)
+    if (signingKey !== "") {
+      core.exportVariable('CACHIX_SIGNING_KEY', signingKey);
+    }
     // TODO: cachix use --watch-store
 
     core.startGroup(`Invoking nix-build`);
@@ -41,9 +43,14 @@ async function run() {
     await exec.exec('nix-build', args, options);
     core.endGroup()
 
+    // Needed for PRs
+    if (signingKey !== "") {
       core.startGroup(`Cachix: pushing to ` + name);
       await exec.exec('cachix', ['push', name].concat(nonEmptySplit(paths, /\s+/)));
       core.endGroup()
+    } else {
+      console.log("No signing key. Assuming it's a pull request, nothing will be pushed.");
+    }
   } catch (error) {
     core.setFailed(`Action failed with error: ${error}`);
     throw(error);