Add support for running routines via command line

app/classes/state/git/CheckoutState.js

@@ -40,6 +40,10 @@ class CheckoutState extends AbstractGitState {
     check_message() {
         return this.failure_message()
     }
+
+    display() {
+        return `Check out ref ${this._config.target} in repo ${this._config.path}...`
+    }
 }
 
 module.exports = exports = CheckoutState

app/classes/state/git/CloneState.js

@@ -30,6 +30,10 @@ class CloneState extends AbstractGitState {
     check_message() {
         return this.failure_message()
     }
+
+    display() {
+        return `Clone repo at ${this._config.source} to ${this._config.path}...`
+    }
 }
 
 module.exports = exports = CloneState

app/classes/state/git/PullState.js

@@ -0,0 +1,36 @@
+const AbstractGitState = require('./AbstractGitState')
+
+class PullState extends AbstractGitState {
+    static get services() {
+        return [...super.services, 'output']
+    }
+
+    async apply() {
+        if ( !(await this.check()) ) {
+            const repo = await this._repo()
+            await repo.pull(this._config.target)
+        }
+    }
+
+    async check() {
+        return true // TODO support a better check here
+    }
+
+    async reverse() {
+        this.output.warn('Pull state does not currently support automatic reversal.')
+    }
+
+    failure_message() {
+        return `The Git repo at "${this._config.path}" on host "${this._host.name}" will be pulled.`
+    }
+
+    check_message() {
+        return this.failure_message()
+    }
+
+    display() {
+        return `Pull refs in repo ${this._config.path}...`
+    }
+}
+
+module.exports = exports = PullState

app/classes/state/git/TagState.js

@@ -33,6 +33,10 @@ class TagState extends AbstractGitState {
     check_message() {
         return this.failure_message()
     }
+
+    display() {
+        return `Create tag ${this._config.tag} in repo ${this._config.path}...`
+    }
 }
 
 module.exports = exports = TagState