1 files changed, 141 insertions, 0 deletions
diff --git a/debian/autodeps.py b/debian/autodeps.py
new file mode 100755
index 0000000..cdbdc70
--- /dev/null
+++ b/debian/autodeps.py
@@ -0,0 +1,141 @@
+#!/usr/bin/python
+# Update dependencies based on info.py
+# Copyright (C) 2010 Jelmer Vernooij <jelmer@debian.org>
+# Licensed under the GNU GPL, version 2 or later.
+
+import ConfigParser
+import optparse
+import os
+import sys
+
+parser = optparse.OptionParser("%s <--minimum-library-version|--update-control> <source-tree>" % sys.argv[0])
+parser.add_option("--minimum-library-version",
+    help="Print argument for --minimum-library-version", action="store_true")
+parser.add_option("--update-control", help="Update debian/control", action="store_true")
+
+(opts, args) = parser.parse_args()
+
+if len(args) != 1:
+    if os.path.exists("source4"):
+        tree = os.getcwd()
+    else:
+        parser.print_usage()
+        sys.exit(1)
+else:
+    tree = args[0]
+
+def update_relation(line, pkg, kind, version):
+    """Update a relation in a control field.
+
+    :param line: Depends-like dependency list
+    :param pkg: Package name
+    :param kind: Version requirement kind ("==", ">=", "<<", etc)
+    :param version: Required version
+    """
+    found = False
+    for pr in line:
+        for e in pr:
+            if e["name"] == pkg and e["version"] and e["version"][0] == kind:
+                e["version"] = (kind, version)
+                found = True
+    if not found:
+        line.append([{"version": (kind, version), "name": pkg, "arch": None}])
+
+
+class LibraryEquivalents(object):
+    """Lookup table for equivalent library versions."""
+
+    def __init__(self, path):
+        self.config = ConfigParser.ConfigParser()
+        self.config.readfp(open(path))
+
+    def find_equivalent(self, package, version):
+        """Find an equivalent version for a specified package version.
+
+        :param package: Package name
+        :param version: Package version as int-tuple.
+        :return: Equivalent version as int-tuple.
+        :raise KeyError: Raised if there was no equivalent version found
+        """
+        try:
+            version = self.config.get(package, ".".join(str(x) for x in version))
+            return tuple([int(x) for x in version.split(".")])
+        except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
+            raise KeyError
+
+    def find_oldest_compatible(self, package, version):
+        try:
+            return self.find_equivalent(package, version)
+        except KeyError:
+            return version
+
+
+def find_version(path):
+    """Find a version in a waf file.
+
+    :param path: waf script to read
+    :return: Version as int-tuple.
+    """
+    v = open(path, 'r')
+    try:
+        for l in v.readlines():
+            if l.startswith("VERSION = '"):
+                return tuple([int(x) for x in l.strip()[len("VERSION = '"):-1].split(".")])
+        raise KeyError
+    finally:
+        v.close()
+
+
+def update_control():
+    """Update the debian control file.
+    """
+    from debian.deb822 import Deb822, PkgRelation
+    f = open('debian/control', 'r')
+    iter = Deb822.iter_paragraphs(f)
+    source = iter.next()
+
+    def update_deps(control, field, package, min_version):
+        bdi = PkgRelation.parse_relations(control[field])
+        update_relation(bdi, package, ">=", "%d.%d.%d~" % min_version)
+        control[field] = PkgRelation.str(bdi)
+
+    talloc_version = find_version(os.path.join(tree, "lib/talloc/wscript"))
+
+    eq_config = LibraryEquivalents('debian/library-equivalents')
+    min_talloc_version = eq_config.find_oldest_compatible("talloc", talloc_version)
+    update_deps(source, "Build-Depends", "libtalloc-dev", min_talloc_version)
+    update_deps(source, "Build-Depends", "python-talloc-dev", min_talloc_version)
+
+    o = open("debian/control", "w+")
+    source.dump(o)
+
+    for binary in iter:
+        o.write("\n")
+        binary.dump(o)
+
+    o.close()
+
+
+def forced_minimum_library_versions():
+    libraries = [
+        ("tdb", "lib/tdb/wscript"),
+        ("talloc", "lib/talloc/wscript"),
+        ("ldb", "source4/lib/ldb/wscript"),
+        ("tevent", "lib/tevent/wscript")]
+    eq_config = LibraryEquivalents('debian/library-equivalents')
+    for (name, path) in libraries:
+        version = find_version(os.path.join(tree, path))
+        try:
+            min_version = eq_config.find_equivalent(name, version)
+        except KeyError:
+            continue
+        yield "%s:%s" % (name, ".".join([str(x) for x in min_version]))
+
+
+if opts.minimum_library_version:
+    print ",".join(forced_minimum_library_versions())
+elif opts.update_control:
+    update_control()
+else:
+    parser.print_usage()
+    sys.exit(1)