feat(spin/preview): add run_build option

Signed-off-by: Vaughn Dice <vaughn.dice@fermyon.com>

Author: vdice

README.md

@@ -226,6 +226,7 @@ If you don't run the preview action with undeploy on the closed event, your prev
 | github_token  | True     | -         | The GitHub token for adding a comment on PR with preview URL.                   |
 | undeploy      | False    | -         | If true, removes the preview deployment from Fermyon Cloud                      |
 | key_values    | False    | -         | Pass one or more key/value pairs to the default store for all components"       |
+| run_build     | False    | True      | If enabled, run `spin build`                                                    |
 | variables     | False    | -         | Pass a variable (variable=value) to all components of the application. You can specify multiple variables by putting each variable/value pair on its own line. Refer to example below. |
 
 ### Outputs

dist/spin/preview/index.js

@@ -18,6 +18,10 @@ inputs:
   key_values:
     required: false
     description: 'Pass a key/value (key=value) to all components of the application. You can specify multiple key_values by putting each key/value pair on its own line'
+  run_build:
+    required: false
+    description: 'run `spin build` if enabled (default)'
+    default: true
   variables:
     required: false
     description: 'Pass a variable (variable=value) to all components of the application. You can specify multiple variables by putting each variable/value pair on its own line'

spin/preview/action.yml

@@ -17,7 +17,11 @@ async function run(): Promise<void> {
 
     const token = core.getInput('fermyon_token', {required: true})
     await cloud.login(token)
-    await actions.build()
+    const buildEnabled =
+      core.getBooleanInput('run_build') === false ? false : true
+    if (buildEnabled) {
+      await actions.build()
+    }
     const appUrl = await actions.deployPreview(prNumber)
     core.setOutput('app-url', appUrl)
   } catch (error) {