Mark finished release and don't consider un-finished releases in rollback

docs/recipe/deploy/rollback.md

@@ -37,7 +37,7 @@ The value of this configuration is autogenerated on access.
 ## Tasks
 
 ### rollback {#rollback}
-[Source](https://github.com/deployphp/deployer/blob/master/recipe/deploy/rollback.php#L63)
+[Source](https://github.com/deployphp/deployer/blob/master/recipe/deploy/rollback.php#L67)
 
 Rollbacks to the previous release.
 

recipe/deploy/release.php

@@ -176,6 +176,8 @@
                 $status = "<error>$release</error> (bad)";
             } elseif (test("[ -f releases/$release/DIRTY_RELEASE ]")) {
                 $status = "<error>$release</error> (dirty)";
+            } elseif (!test("[ -f releases/$release/FINISHED_RELEASE ]")) {
+                $status = "<error>$release</error> (unfinished)";
             } else {
                 $status = "<info>$release</info>";
             }

recipe/deploy/rollback.php

@@ -36,8 +36,12 @@
     while (isset($releasesBeforeCurrent[0])) {
         $candidate = $releasesBeforeCurrent[0];
 
-        // Skip all bad releases.
-        if (test("[ -f {{deploy_path}}/releases/$candidate/BAD_RELEASE ]")) {
+        if (
+            // Only consider successful releases.
+            !test("[ -f {{deploy_path}}/releases/$candidate/FINISHED_RELEASE ]")
+            // Skip all bad releases (that have previously been rolled back).
+            || test("[ -f {{deploy_path}}/releases/$candidate/BAD_RELEASE ]")
+        ) {
             array_shift($releasesBeforeCurrent);
             continue;
         }

recipe/deploy/symlink.php

@@ -18,4 +18,6 @@
         run("cd {{deploy_path}} && {{bin/symlink}} {{release_path}} {{current_path}}"); // Atomic override symlink.
         run("cd {{deploy_path}} && rm release"); // Remove release link.
     }
+
+    run("echo '{{user}}' > {{release_path}}/FINISHED_RELEASE");
 });