added target: make check

Makefile

@@ -1,11 +1,12 @@
-.PHONY : help all clean veryclean fetch build artifacts
+.PHONY : help all clean veryclean fetch build artifacts check
 
 help :
-	@echo "Use: make [all] [clean] [veryclean]"
+	@echo "Use: make [all] [clean] [veryclean] [check] ..."
 	@echo ""
 	@echo "  all       - Build librewolf and it's windows artifacts."
 	@echo "  clean     - Remove output files and temporary files."
 	@echo "  veryclean - Like 'clean', but also remove all downloaded files."
+	@echo "  check     - Check if there is a new version of Firefox."
 	@echo ""
 	@echo "  fetch     - Fetch the latest librewolf source."
 	@echo "  build     - Perform './mach build && ./mach package' on it."
@@ -35,3 +36,8 @@ build :
 artifacts :
 	python3 mk.py artifacts
 
+check : README.md
+	@python3 assets/update-version.py
+	@echo "Current release:" $$(cat ./release)
+
+

assets/update-version.py

@@ -0,0 +1,98 @@
+#!/usr/bin/env python3
+
+import os
+import sys
+import optparse
+
+parser = optparse.OptionParser()
+parser.add_option('-n', '--no-execute', dest='no_execute', default=False, action="store_true")
+options, remainder = parser.parse_args()
+
+def exec(cmd, exit_on_fail = True, do_print = True):
+    if cmd != '':
+        if do_print:
+            print(cmd)
+        if not options.no_execute:
+            retval = os.system(cmd)
+            if retval != 0 and exit_on_fail:
+                    print("fatal error: command '{}' failed".format(cmd))
+                    sys.exit(1)
+            return retval
+    return None
+
+def get_version_from_file(version_filename = './version'):
+    with open(version_filename) as f:
+        lines = f.readlines()  
+        if len(lines) != 1:
+            sys.stderr.write('error: ./version contains too many lines.')
+            os.exit(1)
+        return lines[0].strip()
+    return None
+
+def make_version_string(major,minor,patch):
+    if patch == 0:
+        return '{}.{}'.format(major,minor)
+    else:
+        return '{}.{}.{}'.format(major,minor,patch)
+
+def firefox_release_url(ver):
+    return 'https://archive.mozilla.org/pub/firefox/releases/{}/source/firefox-{}.source.tar.xz'.format(ver, ver)
+
+def check_url_exists(url):
+    i = exec('wget --spider {} 2>/dev/null'.format(url), exit_on_fail=False, do_print=False)
+    if i == 0:
+        return True
+    else:
+        return False
+
+#
+# main script
+#
+
+base_version = get_version_from_file()
+
+# split base_version into major.minor.patch
+split_version = base_version.split(sep='.')
+if len(split_version) > 3 or len(split_version) < 1:
+    sys.stderr.write('error: ./version file contains invalid version number')
+    sys.exit(1)
+elif len(split_version) == 1:
+    major = int(split_version[0])
+    minor = 0
+    patch = 0
+elif len(split_version) == 2:
+    major = int(split_version[0])
+    minor = int(split_version[1])
+    patch = 0
+elif len(split_version) == 3:
+    major = int(split_version[0])
+    minor = int(split_version[1])
+    patch = int(split_version[2])
+
+# now check if this version exists with Mozilla
+if not check_url_exists(firefox_release_url(make_version_string(major,minor,patch))):
+    sys.stderr.write('error: The current version is unavailable.')
+    sys.exit(1)
+
+# Check for releases..
+s = ''
+
+if check_url_exists(firefox_release_url(make_version_string(major,minor,patch+1))):
+    s = ('{}.{}.{}'.format(major,minor,patch+1))
+elif check_url_exists(firefox_release_url(make_version_string(major,minor+1,0))):
+    s = ('{}.{}'.format(major,minor+1))
+elif check_url_exists(firefox_release_url(make_version_string(major+1,0,0))):
+    s = ('{}.0'.format(major+1))
+else:
+    s = base_version
+    
+if s != base_version:
+    print('The wheel has turned, and version {} has been released.'.format(s))
+
+    with open('./version', 'w') as f:
+        f.write(s)
+    exec('echo 0 > release')
+else:
+    print('Latest Firefox release is still {}.'.format(base_version))
+    
+sys.exit(0) # ensure 0 exit code

version

@@ -1 +1 @@
-96.0
+96.0.1