Only process a maximum of 10 releases per update in order to keep the number of open file descriptors lower.

Author: scottgonzalez

src/hook.js

@@ -49,7 +49,10 @@ function processVersions( repo, fn ) {
 
 			return tags.filter(function( tag ) {
 				return !(tag in processedTags);
-			});
+			// only process up to 10 tags per run
+			// this keeps the number of open file descriptors lower
+			// it's unlikely that any update will have more than 10 tags
+			}).slice( -10 );
 		},
 
 		// get releases
@@ -84,7 +87,6 @@ function processVersions( repo, fn ) {
 					return true;
 				}
 
-				// TODO: gracefully handle duplicates in case of retry
 				// track invalid tags so we don't process them on each update
 				pluginsDb.addTag( repo.getId(), tags[ i ], invalidGroup() );
 				return false;

src/pluginsdb.js

@@ -84,7 +84,7 @@ var pluginsDb = module.exports = {
 	}),
 
 	addTag: auto(function( repoId, tag, fn ) {
-		db.run( "INSERT INTO repos( repo, tag ) VALUES( ?, ? )", [ repoId, tag ], fn );
+		db.run( "INSERT OR IGNORE INTO repos( repo, tag ) VALUES( ?, ? )", [ repoId, tag ], fn );
 	}),
 
 	addRelease: auto(function( repoId, release, fn ) {
@@ -166,7 +166,8 @@ var pluginsDb = module.exports = {
 
 				db.run( "CREATE TABLE repos (" +
 					"repo TEXT, " +
-					"tag TEXT" +
+					"tag TEXT, " +
+					"PRIMARY KEY( repo, tag ) " +
 				")", this.parallel() );
 
 				db.run( "CREATE TABLE actions (" +