1 files changed, 155 insertions, 0 deletions
diff --git a/moz-version b/moz-version
new file mode 100755
index 0000000..b14c7fb
--- /dev/null
+++ b/moz-version
@@ -0,0 +1,155 @@
+#!/usr/bin/python
+
+# Copyright (c) 2009-2011, Benjamin Drung <bdrung@debian.org>
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import getopt
+import os
+import sys
+
+from moz_version import (compare_versions, convert_debian_to_moz_version,
+                         convert_moz_to_debian_version)
+
+# error codes
+COMMAND_LINE_SYNTAX_ERROR = 2
+INVALID_COMPARATOR = 3
+EMPTY_VERSION_STRING = 4
+
+COMPARATORS = ("lt", "le", "eq", "ne", "ge", "gt")
+
+
+def moz_version_compare(version1, comparator, version2, silent=False,
+                        verbose=False):
+    """Return true if the expression version1 comparator version2 is valid,
+       otherwise false"""
+    if comparator not in COMPARATORS:
+        if not silent:
+            print >> sys.stderr, "E: The comparator " + comparator + \
+                                 " is not valid. It should one of " + \
+                                 ", ".join(COMPARATORS) + "."
+        sys.exit(INVALID_COMPARATOR)
+
+    if version1.strip() == "" or version2.strip() == "":
+        if not silent:
+            print >> sys.stderr, "E: At least one version string is empty."
+        sys.exit(EMPTY_VERSION_STRING)
+
+    if verbose:
+        symbol = {"lt": "<", "le": "<=", "eq": "=", "ne": "!=",
+                  "ge": ">=", "gt": ">"}
+        print "I: Comparing %s %s %s." % \
+              (version1, symbol[comparator], version2)
+
+    if comparator == "lt":
+        return compare_versions(version1, version2, verbose) < 0
+    elif comparator == "le":
+        return compare_versions(version1, version2, verbose) <= 0
+    elif comparator == "eq":
+        return compare_versions(version1, version2, verbose) == 0
+    elif comparator == "ne":
+        return compare_versions(version1, version2, verbose) != 0
+    elif comparator == "ge":
+        return compare_versions(version1, version2, verbose) >= 0
+    elif comparator == "gt":
+        return compare_versions(version1, version2, verbose) > 0
+
+
+def usage(output):
+    name = os.path.basename(sys.argv[0])
+    print >> output, """Usage: %s [options] action
+
+Actions:
+  -c, --compare version1 comparator version2
+                           compare both Mozilla version numbers
+                           comparator must be one of %s
+  -d, --to-deb version     converts Mozilla into a Debian upstream version
+  -m, --to-moz version     converts Debian into a Mozilla version
+
+Options:
+  -h, --help               display this help and exit
+  -s, --silent             do not print anything and die silent on errors
+  -v, --verbose            print more information
+
+See %s(1) for more info.""" % (name, ", ".join(COMPARATORS), name)
+
+
+def main():
+    try:
+        long_opts = ["compare", "help", "silent", "to-deb", "to-moz", "verbose"]
+        opts, args = getopt.gnu_getopt(sys.argv[1:], "cdhmsv", long_opts)
+    except getopt.GetoptError, e:
+        # print help information and exit:
+        print >> sys.stderr, str(e)
+        usage(sys.stderr)
+        sys.exit(COMMAND_LINE_SYNTAX_ERROR)
+
+    actions = set()
+    silent = False
+    verbose = False
+
+    for o, _ in opts:
+        if o in ("-c", "--compare"):
+            actions.add("compare")
+        elif o in ("-d", "--to-deb"):
+            actions.add("to-deb")
+        elif o in ("-h", "--help"):
+            usage(sys.stdout)
+            sys.exit()
+        elif o in ("-m", "--to-moz"):
+            actions.add("to-moz")
+        elif o in ("-s", "--silent"):
+            silent = True
+        elif o in ("-v", "--verbose"):
+            verbose = True
+        else:
+            assert False, "unhandled option"
+
+    if len(actions) != 1:
+        if not silent:
+            print >> sys.stderr, "E: You must specify an action."
+            usage(sys.stderr)
+        sys.exit(COMMAND_LINE_SYNTAX_ERROR)
+
+    action = actions.pop()
+
+    if action == "compare":
+        if len(args) != 3:
+            if not silent:
+                usage(sys.stderr)
+            sys.exit(COMMAND_LINE_SYNTAX_ERROR)
+        if moz_version_compare(args[0], args[1], args[2], silent, verbose):
+            if verbose:
+                print "I: Compare expression true."
+            sys.exit(0)
+        else:
+            if verbose:
+                print "I: Compare expression false."
+            sys.exit(1)
+    elif action == "to-deb":
+        if len(args) != 1:
+            if not silent:
+                print >> sys.stderr, "E: The action --to-deb takes exactly " + \
+                                     "one argument."
+            sys.exit(COMMAND_LINE_SYNTAX_ERROR)
+        print convert_moz_to_debian_version(args[0], 0, verbose)
+    elif action == "to-moz":
+        if len(args) != 1:
+            if not silent:
+                print >> sys.stderr, "E: The action --to-moz takes exactly " + \
+                                     "one argument."
+            sys.exit(COMMAND_LINE_SYNTAX_ERROR)
+        print convert_debian_to_moz_version(args[0])
+
+if __name__ == "__main__":
+    main()