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authorAlexander Sack <asac@ubuntu.com>2009-07-29 01:08:24 +0200
committerAlexander Sack <asac@ubuntu.com>2009-07-29 01:08:24 +0200
commit88775747456387c8c0e1d06e9e53a6c8d0f39675 (patch)
treec7225e93629e60eb7f143a012dc8ad00dceedce5 /src
parent27c7eca16db3a7af3a850663ba033f2573972322 (diff)
- add moz-version-compare helper script and ship it in extra_files; this script
implements compare operations for mozilla versions as in https://developer.mozilla.org/en/Toolkit_version_format; thanks to Benjamin Drung <bdrung@ubuntu.com> for this contribution - add src/moz-version-compare - update src/Makefile
Diffstat (limited to 'src')
-rw-r--r--src/Makefile1
-rwxr-xr-xsrc/moz-version-compare145
2 files changed, 146 insertions, 0 deletions
diff --git a/src/Makefile b/src/Makefile
index 23f324d..6e6b360 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -47,6 +47,7 @@ subst_files = \
extra_files = \
xpi.mk \
lp-locale-export.mk \
+ moz-version-compare \
$(NULL)
extra_dirs = \
diff --git a/src/moz-version-compare b/src/moz-version-compare
new file mode 100755
index 0000000..6301053
--- /dev/null
+++ b/src/moz-version-compare
@@ -0,0 +1,145 @@
+#!/usr/bin/python
+
+# Copyright (c) 2009 Benjamin Drung <bdrung@ubuntu.com>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+# Reference: https://developer.mozilla.org/en/Toolkit_version_format
+
+import sys
+
+def decode_part(part):
+ """Decodes a version part (like 5pre4) to <number-a><string-b><number-c><string-d>"""
+ subpart = [0,"",0,""]
+
+ # Split <number-a>
+ length = 0
+ for i in xrange(len(part)):
+ if part[i].isdigit() or part[i] in ("-"):
+ length += 1
+ else:
+ break
+ if length > 0:
+ subpart[0] = int(part[0:length])
+ part = part[length:]
+
+ # Split <string-b>
+ length = 0
+ for i in xrange(len(part)):
+ if not (part[i].isdigit() or part[i] in ("-")):
+ length += 1
+ else:
+ break
+ subpart[1] = part[0:length]
+ part = part[length:]
+
+ # Split <number-c>
+ length = 0
+ for i in xrange(len(part)):
+ if part[i].isdigit() or part[i] in ("-"):
+ length += 1
+ else:
+ break
+ if length > 0:
+ subpart[2] = int(part[0:length])
+ subpart[3] = part[length:]
+
+ # if string-b is a plus sign, number-a is incremented to be compatible with
+ # the Firefox 1.0.x version format: 1.0+ is the same as 1.1pre
+ if subpart[1] == "+":
+ subpart[0] += 1
+ subpart[1] = "pre"
+
+ # if the version part is a single asterisk, it is interpreted as an
+ # infinitely-large number: 1.5.0.* is the same as 1.5.0.(infinity)
+ if subpart[1] == "*":
+ subpart[0] = sys.maxint
+ subpart[1] = ""
+
+ return subpart
+
+def decode_version(version):
+ """Decodes a version string like 1.1pre1a"""
+ parts = version.split(".")
+ decoded_parts = map(decode_part, parts)
+ return decoded_parts
+
+def compare((a, b)):
+ # A string-part that exists is always less-then a nonexisting string-part
+ if a == "":
+ if b == "":
+ return 0
+ else:
+ return 1
+ elif b == "":
+ if a == "":
+ return 0
+ else:
+ return -1
+ else:
+ return cmp(a, b)
+
+def compare_part((x, y)):
+ compared_subparts = filter(lambda x: x != 0, map(compare, zip(x, y)))
+ if compared_subparts:
+ return compared_subparts[0]
+ else:
+ return 0
+
+def compare_versions(a, b):
+ if len(a) < len(b):
+ a.extend((len(b) - len(a)) * [[0,"",0,""]])
+ if len(b) < len(a):
+ b.extend((len(a) - len(b)) * [[0,"",0,""]])
+
+ result = filter(lambda x: x != 0, map(compare_part, zip(a, b)))
+ if result:
+ return result[0]
+ else:
+ return 0
+
+def moz_compare_versions(version1, operator, version2):
+ """Return true if the expression version1 operator version2 is valid, otherwise false"""
+ operators = ("lt", "le", "eq", "ne", "ge", "gt")
+ if operator not in operators:
+ print "E: The operator " + operator + " is not valid. It should one of " + ", ".join(operators) + "."
+ sys.exit(2)
+
+ a = decode_version(version1)
+ b = decode_version(version2)
+
+ if operator == "lt":
+ return compare_versions(a, b) < 0
+ elif operator == "le":
+ return compare_versions(a, b) <= 0
+ elif operator == "eq":
+ return compare_versions(a, b) == 0
+ elif operator == "ne":
+ return compare_versions(a, b) != 0
+ elif operator == "ge":
+ return compare_versions(a, b) >= 0
+ elif operator == "gt":
+ return compare_versions(a, b) > 0
+
+if __name__ == "__main__":
+ if moz_compare_versions(sys.argv[1], sys.argv[2], sys.argv[3]):
+ sys.exit(0)
+ else:
+ sys.exit(1)
+