Allow running the module updater over multiple branches

This will make it easier to run the updater as a bot in the future.

Change-Id: If9944225d7d245719f198b29935e71fb9713db76
Reviewed-by: Aapo Keskimolo <aapo.keskimolo@qt.io>

4 files changed, 111 insertions, 2 deletions

diff --git a/src/qtmoduleupdater/autorun.go b/src/qtmoduleupdater/autorun.go
new file mode 100644
index 00000000..4cfc6fcc
--- /dev/null
+++ b/src/qtmoduleupdater/autorun.go
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the repo tools module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"os"
+)
+
+// AutoRunSettings is used to read autorun.json.
+type AutoRunSettings struct {
+	Version  int      `json:"version"`
+	Branches []string `json:"branches"`
+}
+
+func (settings *AutoRunSettings) load() error {
+	file, err := os.Open("autorun.json")
+	if err != nil {
+		return fmt.Errorf("Error opening autorun.json for reading: %s", err)
+	}
+	defer file.Close()
+	content, err := ioutil.ReadAll(file)
+	if err != nil {
+		return fmt.Errorf("Error reading from autorun.json: %s", err)
+	}
+	return json.Unmarshal(content, settings)
+}
+
+func (settings *AutoRunSettings) runUpdates(gerrit *gerritInstance) {
+	// ### might make sense to turn this into a loop over known products or read from settings. On the other hand we want
+	// to avoid coding products into the file for now but rather query a list of products from Gerrit (in the future). Therefore
+	// I'm keeping the product out of the file
+	product := "qt/qt5"
+	for _, branch := range settings.Branches {
+		batch, err := newModuleUpdateBatch(product, branch, "")
+		if err != nil {
+			fmt.Printf("Error loading update batch state for %s/%s: %s\n", product, branch, err)
+			continue
+		}
+
+		if err := batch.runOneIteration(gerrit); err != nil {
+			fmt.Printf("Error iterating on update batch for %s/%s: %s\n", product, branch, err)
+			continue
+		}
+	}
+}
diff --git a/src/qtmoduleupdater/autorun.json b/src/qtmoduleupdater/autorun.json
new file mode 100644
index 00000000..046f9c03
--- /dev/null
+++ b/src/qtmoduleupdater/autorun.json
@@ -0,0 +1,5 @@
+{
+    "$schema": "./autorun_schema.json",
+    "version": 1,
+    "branches": ["dev"]
+}
diff --git a/src/qtmoduleupdater/autorun_schema.json b/src/qtmoduleupdater/autorun_schema.json
new file mode 100644
index 00000000..3d8ff75b
--- /dev/null
+++ b/src/qtmoduleupdater/autorun_schema.json
@@ -0,0 +1,18 @@
+{
+    "title": "qtmoduleupdater auto-run configuration",
+    "type": "object",
+    "properties": {
+        "version": {
+            "type": "integer",
+            "description": "The file format version expected, currently 1."
+        },
+        "branches": {
+            "type": "array",
+            "description": "List of qt5 branches to submit updates to.",
+            "items": {
+                "type": "string"
+            }
+        }
+    },
+    "required": ["version"]
+}
diff --git a/src/qtmoduleupdater/main.go b/src/qtmoduleupdater/main.go
index 0ad79735..301d0fe1 100644
--- a/src/qtmoduleupdater/main.go
+++ b/src/qtmoduleupdater/main.go
@@ -69,6 +69,8 @@ func appMain() error {
 	flag.BoolVar(&summaryOnly, "summarize", false /*default*/, "")
 	verbose := false
 	flag.BoolVar(&verbose, "verbose", false /*default*/, "Enable verbose logging output")
+	autorun := false
+	flag.BoolVar(&autorun, "autorun", false, "Run automatically by reading settings from autorun.json")
 	flag.Parse()
 
 	if !verbose {
@@ -77,8 +79,8 @@ func appMain() error {
 		log.SetOutput(ioutil.Discard)
 	}
 
-	if branch == "" {
-		return fmt.Errorf("missing branch. Please specify -branch=<name of branch>")
+	if autorun {
+		stageAsBot = true
 	}
 
 	gerrit := &gerritInstance{}
@@ -92,6 +94,17 @@ func appMain() error {
 		}
 	}
 
+	if autorun {
+		autorun := &AutoRunSettings{}
+		autorun.load()
+		autorun.runUpdates(gerrit)
+		return nil
+	}
+
+	if branch == "" {
+		return fmt.Errorf("missing branch. Please specify -branch=<name of branch>")
+	}
+
 	batch, err := newModuleUpdateBatch(product, branch, productRef)
 	if err != nil {
 		return err