[jhbuild/jhdebuild: 513/536] [jhdebuild] Add Debian helper functions

[John Carr <johncarr src gnome org>]

commit 8c5d5bd3d3d85a31c0392b8c35d66c62f535d714
Author: Frederic Peters <fpeters 0d be>
Date:   Sun May 17 13:30:06 2009 +0100

    [jhdebuild] Add Debian helper functions
---
 jhbuild/utils/debian.py |  118 +++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 118 insertions(+), 0 deletions(-)

diff --git a/jhbuild/utils/debian.py b/jhbuild/utils/debian.py
new file mode 100644
index 0000000..0532b9e
--- /dev/null
+++ b/jhbuild/utils/debian.py
@@ -0,0 +1,118 @@
+import os
+import rfc822
+import re
+import apt_pkg
+import gzip
+
+
+REPREPRO_DIR = os.path.expanduser('~/.jhdebuild/reprepro')
+
+ARCH = os.popen('dpkg-architecture -qDEB_HOST_ARCH').read().strip()
+
+def install_changes(buildscript, filename):
+    moduleset = buildscript.config.moduleset
+    if type(moduleset) is list:
+        moduleset = moduleset[0]
+    if not os.path.exists(REPREPRO_DIR):
+        os.makedirs(REPREPRO_DIR)
+        os.mkdir(os.path.join(REPREPRO_DIR, 'conf'))
+        open(os.path.join(REPREPRO_DIR, 'conf', 'distributions'), 'w').write("""\
+Origin: jhdebuild
+Label: JhDebuild Packages Repository
+Codename: %s
+Architectures: i386 source
+Components: main
+UDebComponents: main
+Description: JhDebuild Packages
+""" % moduleset)
+
+    buildscript.execute(['reprepro', '--ignore=wrongdistribution', '--section=main',
+            '-b', REPREPRO_DIR, 'include', moduleset, filename])
+
+
+def check_build_depends(debian_control):
+    '''check build dependencies'''
+    current = None
+    versions = {}
+    providers = {}
+    installed = False
+    for line in open('/var/lib/dpkg/status'):
+        if line.startswith('Package: '):
+            installed = False
+            name = line.split(':')[1].strip()
+        elif line.startswith('Status: '):
+            if line.strip().endswith(' ok installed'):
+                installed = True
+        elif line.startswith('Version: ') and installed:
+            versions[name] = line.split(':', 1)[1].strip()
+            providers[name] = [name]
+        elif line.startswith('Provides: ') and installed:
+            for p in line.split(':')[1].strip().split(', '):
+                providers[p] = providers.get(p, [])
+                providers[p].append(name)
+
+    m = rfc822.Message(file(debian_control))
+    build_deps = m.getheader('Build-Depends') or ''
+    build_deps_indep = m.getheader('Build-Depends-Indep') or ''
+
+    failures = []
+    for depend in build_deps.split(',') + build_deps_indep.split(','):
+        depend = depend.strip()
+
+        ok = False
+        names = []
+        for dep in depend.split('|'):
+            dep = dep.strip()
+
+            if not dep:
+                continue
+            
+            try:
+                name, relation, version = re.findall('([A-Za-z0-9+.-]+) \(([<>=]+) (.+)\)', dep)[0]
+            except IndexError:
+                name = re.findall('([A-Za-z0-9+.-]+)', dep)[0]
+                relation, version = None, None
+            if '[' in dep:
+                archs = dep[dep.index('[')+1:dep.rindex(']')].split(' ')
+                if ARCH not in archs:
+                    continue
+
+            names.append(name)
+            if relation and version:
+                if not versions.has_key(name):
+                    continue
+                else:
+                    r = apt_pkg.VersionCompare(versions[name], version)
+                    if not ((relation == '<=' and r <= 0) or (relation == '<<' and r < 0) or (
+                             relation == '>>' and r > 0) or (relation == '>=' and r >= 0) or (
+                             relation == '>' and r > 0) or (relation == '<' and r < 0) or (
+                             relation == '=' and r == 0)):
+                        continue
+                break
+            else:
+                if not providers.has_key(name):
+                    continue
+                break
+        else:
+            if names:
+                failures.append(names)
+
+    return failures
+
+def get_version(buildscript, package):
+    moduleset = buildscript.config.moduleset
+    if type(moduleset) is list:
+        moduleset = moduleset[0]
+    sources_filename = os.path.join(REPREPRO_DIR, 'dists', moduleset, 'main/source/Sources.gz')
+    if not os.path.exists(sources_filename):
+        return None
+
+    for line in gzip.open(sources_filename):
+        if line.startswith('Package: '):
+            name = line.split(':')[1].strip()
+        elif line.startswith('Version:' ):
+            version = line.split(':', 1)[1].strip()
+            if name == package:
+                return version
+    return None
+