2 files changed, 129 insertions, 2 deletions
diff --git a/BuildTools/GenerateAppCastFeeds.py b/BuildTools/GenerateAppCastFeeds.py
new file mode 100755
index 0000000..fe39e3c
--- /dev/null
+++ b/BuildTools/GenerateAppCastFeeds.py
@@ -0,0 +1,128 @@
+#!/usr/bin/env python2
+
+# This script generates three app cast feeds for macOS Sparkle updates from Swift releases in the download folder on the Swift website.
+
+from xml.etree import ElementTree as ET
+import argparse
+import datetime
+import email.utils as eut
+import fnmatch
+import jinja2
+import os.path
+import re
+import time
+import urllib2
+import urlparse
+
+class Release:
+    def __init__(self, version, absoluteURL, sizeInBytes, date):
+        self.version = version
+        self.shortVersion = version.split('-', 1)[1]
+        self.url = absoluteURL
+        self.sizeInBytes = sizeInBytes
+        self.date = date
+        dateTumple = date.timetuple()
+        dateTimestamp = time.mktime(dateTumple)
+        self.dateString = eut.formatdate(dateTimestamp)
+
+    def __str__(self):
+        return "Release(%s, %s, %s, %s)" % (self.version, self.url, self.sizeInBytes, self.date)
+
+    def __repr__(self):
+        return "Release(%s, %s, %s, %s)" % (self.version, self.url, self.sizeInBytes, self.date)
+
+def getReleaseFromAbsoluteFilePath(absolutePath, downloadsFolder, downloadsURL):
+    version = os.path.splitext(absolutePath.split('/')[-1])[0]
+    sizeInBytes = os.path.getsize(absolutePath)
+    date = datetime.datetime.fromtimestamp(os.path.getmtime(absolutePath))
+    absoluteURL = urlparse.urljoin(downloadsURL, os.path.relpath(absolutePath, downloadsFolder))
+    return Release(version, absoluteURL, sizeInBytes, date)
+
+def getReleaseFromReleaseFolder(releaseFolder, downloadsFolder, downloadsURL, extension):
+    release = None
+    regex = re.compile(fnmatch.translate(extension))
+
+    files = [f for f in os.listdir(releaseFolder) if os.path.isfile(os.path.join(releaseFolder, f))]
+    for file in files:
+        fileFullPath = os.path.join(releaseFolder, file)
+        if regex.match(fileFullPath):
+            release = getReleaseFromAbsoluteFilePath(fileFullPath, downloadsFolder, downloadsURL)
+    return release
+
+def getReleaseFilesInDownloadsFolder(downloadsFolder, downloadsURL, extension):
+    releasesFolder = os.path.join(downloadsFolder, "releases")
+    releases = []
+
+    dirs = [d for d in os.listdir(releasesFolder) if os.path.isdir(os.path.join(releasesFolder, d))]
+    for d in dirs:
+        release = getReleaseFromReleaseFolder(os.path.join(releasesFolder, d), downloadsFolder, downloadsURL, extension)
+        if release:
+            releases.append(release)
+
+    return releases
+
+def writeAppcastFile(filename, title, description, regexPattern, appcastURL, releases):
+    template = jinja2.Template('''<rss xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" xmlns:dc="http://purl.org/dc/elements/1.1/" version="2.0">
+    <channel>
+    <title>{{ title }}</title>
+    <link>{{ appcast_url }}</link>
+    <description>{{ description }}</description>
+    <language>en</language>
+    {% for item in releases %}<item>
+        <title>Swift version {{ item.version }}</title>
+            <pubDate>{{ item.dateString }}</pubDate>
+            <enclosure url="{{ item.url }}"
+                sparkle:version="{{ item.version }}"
+                sparkle:shortVersionString="{{ item.shortVersion }}"
+                length="{{ item.sizeInBytes }}"
+                type="application/octet-stream" />
+    </item>
+    {% endfor %}</channel>
+</rss>''')
+
+    matchingReleases = [i for i in releases if re.match(regexPattern, i.version)]
+    matchingReleases = matchingReleases[:2] # only include the first two matches in the appcast
+
+    appcastContent = template.render(title=title, appcast_url=appcastURL, description=description, releases=matchingReleases)
+
+    contentParsesOK = False
+    try:
+        x = ET.fromstring(appcastContent)
+        contentParsesOK = True
+    except :
+        contentParsesOK = False
+
+    if contentParsesOK:
+        with open(filename, 'w') as file:
+            file.write(appcastContent)
+    else:
+        print("Failed to generate valid appcast feed %s." % filename)
+
+parser = argparse.ArgumentParser(description='Generate stable/testing/development appcast feeds for Sparkle updater.')
+parser.add_argument('downloadsFolder', type=str, help="e.g. /Users/foo/website/downloads/")
+parser.add_argument('downloadsURL', type=str, help="e.g. https://swift.im/downloads/")
+
+args = parser.parse_args()
+
+releases = getReleaseFilesInDownloadsFolder(args.downloadsFolder, args.downloadsURL, "*.dmg")
+
+releases.sort(key=lambda release: release.date, reverse=True)
+
+writeAppcastFile(filename=os.path.join(args.downloadsFolder, "swift-stable-appcast-mac.xml"),
+    title="Swift Stable Releases",
+    description="",
+    regexPattern="^Swift\-\d+(\.\d+)?(\.\d+)?$",
+    appcastURL=urlparse.urljoin(args.downloadsURL, "swift-stable-appcast-mac.xml"),
+    releases=releases)
+writeAppcastFile(filename=os.path.join(args.downloadsFolder, "swift-testing-appcast-mac.xml"),
+    title="Swift Testing Releases",
+    description="",
+    regexPattern="^Swift\-\d+(\.\d+)?(\.\d+)?(beta\d+)?(rc\d+)?$",
+    appcastURL=urlparse.urljoin(args.downloadsURL, "swift-testing-appcast-mac.xml"),
+    releases=releases)
+writeAppcastFile(filename=os.path.join(args.downloadsFolder, "swift-development-appcast-mac.xml"),
+    title="Swift Development Releases",
+    description="",
+    regexPattern="^Swift\-\d+(\.\d+)?(\.\d+)?(alpha)?(beta\d+)?(rc\d+)?(-dev\d+)?$",
+    appcastURL=urlparse.urljoin(args.downloadsURL, "swift-development-appcast-mac.xml"),
+    releases=releases)
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
index 3d9c1a7..3e48510 100644
--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -84,8 +84,7 @@ To build with Sparkle support, simply download Sparkle-1.14.0 and extract it to
 `3rdParty/Sparkle/Sparkle-1.14.0`. SCons will pick it up during configuration
 and build Swift with Sparkle support.
 
-The appcast URL is specified as a compile time preprocessor variable `SWIFT_APPCAST_URL`
-in `Swift/QtUI/QtSwift.cpp`
+The appcast URLs are specified in `Swift/QtUI/SwiftUpdateFeeds.h`.
 
 ## Building Swiften for Android
 This section describes how to build Swiften for Android. It can then be used from any Android native code. This guide has been tested on OS X and Linux.