Ichthyostega
806db414dd
* Lumiera source code always was copyrighted by individual contributors * there is no entity "Lumiera.org" which holds any copyrights * Lumiera source code is provided under the GPL Version 2+ == Explanations == Lumiera as a whole is distributed under Copyleft, GNU General Public License Version 2 or above. For this to become legally effective, the ''File COPYING in the root directory is sufficient.'' The licensing header in each file is not strictly necessary, yet considered good practice; attaching a licence notice increases the likeliness that this information is retained in case someone extracts individual code files. However, it is not by the presence of some text, that legally binding licensing terms become effective; rather the fact matters that a given piece of code was provably copyrighted and published under a license. Even reformatting the code, renaming some variables or deleting parts of the code will not alter this legal situation, but rather creates a derivative work, which is likewise covered by the GPL! The most relevant information in the file header is the notice regarding the time of the first individual copyright claim. By virtue of this initial copyright, the first author is entitled to choose the terms of licensing. All further modifications are permitted and covered by the License. The specific wording or format of the copyright header is not legally relevant, as long as the intention to publish under the GPL remains clear. The extended wording was based on a recommendation by the FSF. It can be shortened, because the full terms of the license are provided alongside the distribution, in the file COPYING.
378 lines
15 KiB
Python
378 lines
15 KiB
Python
# coding: utf-8
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##
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## LumieraEnvironment.py - custom SCons Environment
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##
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# Copyright (C)
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# 2008, Hermann Vosseler <Ichthyostega@web.de>
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#
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# **Lumiera** is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version. See the file COPYING for further details.
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#####################################################################
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from os import path
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import SCons.SConf
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from SCons.Action import Action
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from SCons.Environment import Environment
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from Buildhelper import *
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class LumieraEnvironment(Environment):
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""" Custom SCons build environment for Lumiera
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This allows us to carry structured config data without
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using global vars. Idea inspired by Ardour.
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"""
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def __init__(self, buildSetup, buildVars, **kw):
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kw.update(VERSION = buildSetup.VERSION
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,TARGDIR = buildSetup.TARGDIR
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,DESTDIR = '$INSTALLDIR/$PREFIX'
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,toolpath = [buildSetup.TOOLDIR ]
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,variables = buildVars
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)
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Environment.__init__ (self, **kw)
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self.path = Record (extract_localPathDefs(buildSetup)) # e.g. buildExe -> env.path.buildExe
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self.libInfo = {}
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self.Tool("BuilderGCH")
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self.Tool("BuilderDoxygen")
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self.Tool("ToolDistCC")
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self.Tool("ToolCCache")
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register_LumieraResourceBuilder(self)
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register_LumieraCustomBuilders(self)
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def Configure (self, *args, **kw):
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kw['env'] = self
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return apply(LumieraConfigContext, args, kw)
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def mergeConf (self,other):
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""" extract the library/compiler flags from other Environment.
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Optionally accepts a list or just sting(s) representing keys
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in our own libInfo Dictionary
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"""
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if isinstance(other, list):
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for elm in other:
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self.mergeConf(elm)
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elif isinstance(other, str):
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if other in self.libInfo:
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self.mergeConf(self.libInfo[other])
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else:
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self.Append (LIBS = other.get ('LIBS',[]))
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self.Append (LIBPATH = other.get ('LIBPATH', []))
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self.Append (CPPPATH = other.get('CPPPATH', []))
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self.Append (LINKFLAGS = other.get('LINKFLAGS', []))
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return self
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def addLibInfo (self, libID, minVersion=0, alias=None):
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""" use pkg-config to create an Environment describing the lib.
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Don't add this defs to the current Environment, rather store
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them in the libInfo Dictionary.
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"""
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minVersion = str(minVersion)
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if 0 != os.system('pkg-config --print-errors --exists "%s >= %s"' % (libID,minVersion)):
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print "Problems configuring the Library %s (>= %s)" % (libID,minVersion)
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return False
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self.libInfo[libID] = libInfo = Environment()
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libInfo["ENV"]["PKG_CONFIG_PATH"] = os.environ.get("PKG_CONFIG_PATH")
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libInfo.ParseConfig ('pkg-config --cflags --libs '+ libID )
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if alias:
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self.libInfo[alias] = libInfo
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return libInfo
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# extending the 'Configure' functionality of SCons,
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# especially for library dependency checking
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ConfigBase = SCons.SConf.SConfBase
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class LumieraConfigContext(ConfigBase):
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""" Extends the SCons Configure context with some convenience methods
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"""
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def __init__(self, *args,**kw):
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ConfigBase.__init__(self,*args,**kw)
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def CheckPkgConfig (self, libID, minVersion=0, alias=None):
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print "Checking for library configuration: %s " % libID
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# self.Message(self,"Checking for library configuration: %s " % libID)
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return self.env.addLibInfo (libID, minVersion, alias)
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###############################################################################
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####### Lumiera custom tools and builders #####################################
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def register_LumieraResourceBuilder(env):
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""" Registers Custom Builders for generating and installing Icons.
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Additionally you need to build the tool (rsvg-convert.c)
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used to generate png from the svg source using librsvg.
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"""
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import IconSvgRenderer as renderer # load Joel's python script for invoking the rsvg-convert (SVG render)
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renderer.rsvgPath = env.subst("$TARGDIR/rsvg-convert")
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def invokeRenderer(target, source, env):
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source = str(source[0])
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targetdir = env.subst(env.path.buildIcon)
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if targetdir.startswith('#'): targetdir = targetdir[1:]
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renderer.main([source,targetdir])
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return 0
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def createIconTargets(target,source,env):
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""" parse the SVG to get the target file names """
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source = str(source[0])
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targetdir = env.path.buildIcon
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targetfiles = renderer.getTargetNames(source) # parse SVG
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# additionally create an installation task for each Icon to be generated
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installLocation = env.path.installIcon
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generateTargets = []
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for icon in targetfiles:
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icon = targetdir+icon
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subdir = getDirname(str(icon))
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env.Install (installLocation+subdir, icon)
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generateTargets.append(icon)
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return (generateTargets, source)
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def IconResource(env, source):
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""" copy icon pixmap to corresponding icon dir. """
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subdir = getDirname(str(source))
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toBuild = env.path.buildIcon+subdir
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toInstall = env.path.installIcon+subdir
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env.Install (toInstall, source)
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return env.Install(toBuild, source)
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def GuiResource(env, source):
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""" pick up giben source resource and install
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them (flat) into the configured target
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"""
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toBuild = env.path.buildUIRes
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toInstall = env.path.installUIRes
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env.Install (toInstall, source)
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return env.Install(toBuild, source)
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def ConfigData(env, prefix, source, targetDir=None):
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""" install (copy) configuration- and metadata.
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target dir is either the install location configured (in SConstruct),
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or an explicitly given absolute or relative path segment, which might refer
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to the location of the executable through the $ORIGIN token
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"""
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source = path.join(prefix,str(source))
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subdir = getDirname(source, prefix) # removes source location path prefix
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if targetDir:
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if path.isabs(targetDir):
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toBuild = toInstall = path.join(targetDir,subdir)
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else:
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if targetDir.startswith('$ORIGIN'):
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targetDir = targetDir[len('$ORIGIN'):]
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toBuild = path.join(env.path.buildExe, targetDir, subdir)
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toInstall = path.join(env.path.installExe, targetDir, subdir)
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else:
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toBuild = path.join(env.path.buildConf, targetDir, subdir)
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toInstall = path.join(env.path.installConf, targetDir, subdir)
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else:
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toBuild = path.join(env.path.buildConf,subdir)
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toInstall = path.join(env.path.installConf,subdir)
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env.Install (toInstall, source)
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return env.Install(toBuild, source)
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buildIcon = env.Builder( action = Action(invokeRenderer, "rendering Icon: $SOURCE --> $TARGETS")
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, single_source = True
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, emitter = createIconTargets
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)
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env.Append(BUILDERS = {'IconRender' : buildIcon})
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env.AddMethod(IconResource)
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env.AddMethod(GuiResource)
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env.AddMethod(ConfigData)
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class WrappedStandardExeBuilder(SCons.Util.Proxy):
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""" Helper to add customisations and default configurations to SCons standard builders.
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The original builder object is wrapped and most calls are simply forwarded to this
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wrapped object by Python magic. But some calls are intercepted in order to inject
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suitable default configuration based on the project setup.
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"""
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def __init__(self, originalBuilder):
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SCons.Util.Proxy.__init__ (self, originalBuilder)
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def __nonzero__(self): return True
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def __call__(self, env, target=None, source=None, **kw):
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""" when the builder gets invoked from the SConscript...
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create a clone environment for specific configuration
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and then pass on the call to the wrapped original builder.
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Automatically define installation targets for build results.
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@note only returning the build targets, not the install targets
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"""
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customisedEnv = self.getCustomEnvironment(env, target=target, **kw) # defined in subclasses
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buildTarget = self.buildLocation(customisedEnv, target)
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buildTarget = self.invokeOriginalBuilder(customisedEnv, buildTarget, source, **kw)
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self.installTarget(customisedEnv, buildTarget, **kw)
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return buildTarget
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def invokeOriginalBuilder(self, env, target, source, **kw):
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return self.get().__call__ (env, target, source, **kw)
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def buildLocation(self, env, target):
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""" prefix project output directory """
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prefix = self.getBuildDestination(env)
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return list(prefix+str(name) for name in target)
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def installTarget(self, env, buildTarget, **kw):
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""" create an additional installation target
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for the generated executable artifact
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"""
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indeedInstall = lambda p: p and p.get('install')
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if indeedInstall(kw):
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return env.Install (dir = self.getInstallDestination(env), source=buildTarget)
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else:
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return []
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class LumieraExeBuilder(WrappedStandardExeBuilder):
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def getCustomEnvironment(self, lumiEnv, **kw):
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""" augments the built-in Program() builder to add a fixed rpath based on $ORIGIN
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That is: after searching LD_LIBRARY_PATH, but before the standard linker search,
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the directory relative to the position of the executable ($ORIGIN) is searched.
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This search path is active not only for the executable, but for all libraries
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it is linked with.
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@note: enabling the new ELF dynamic tags. This causes a DT_RUNPATH to be set,
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which results in LD_LIBRARY_PATH being searched *before* the RPATH
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"""
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custEnv = lumiEnv.Clone()
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custEnv.Append( LINKFLAGS = "-Wl,-rpath=\\$$ORIGIN/modules,--enable-new-dtags" )
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custEnv.Append( LINKFLAGS = "-Wl,-rpath-link=target/modules" ) ### Workaround for bug in binutils > 2.23 /////TICKET #965
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if 'addLibs' in kw:
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custEnv.Append(LIBS = kw['addLibs'])
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return custEnv
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def getBuildDestination(self, lumiEnv): return lumiEnv.path.buildExe
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def getInstallDestination(self, lumiEnv): return lumiEnv.path.installExe
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class LumieraModuleBuilder(WrappedStandardExeBuilder):
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def getCustomEnvironment(self, lumiEnv, target, **kw):
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""" augments the built-in SharedLibrary() builder to add some tweaks missing in SCons 1.0,
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like setting a SONAME proper instead of just passing the relative pathname to the linker.
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Besides, we override the library search path to allow for transitive dependencies between
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Lumiera modules; modules are assumed to reside in a subdirectory below the executable.
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"""
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custEnv = lumiEnv.Clone()
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custEnv.Append(LINKFLAGS = "-Wl,-soname="+self.defineSoname(target,**kw))
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custEnv.Append( LINKFLAGS = "-Wl,-rpath=\\$$ORIGIN/../modules,--enable-new-dtags" )
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if 'addLibs' in kw:
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custEnv.Append(LIBS = kw['addLibs'])
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return custEnv
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def getBuildDestination(self, lumiEnv): return lumiEnv.path.buildLib
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def getInstallDestination(self, lumiEnv): return lumiEnv.path.installLib
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def defineSoname (self, target, **kw):
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""" internal helper to extract or guess
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a suitable library SONAME, either using an
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explicit spec, falling back on the lib filename
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"""
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if 'soname' in kw:
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soname = self.subst(kw['soname']) # explicitly defined by user
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else: # else: use the library filename as DT_SONAME
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if SCons.Util.is_String(target):
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pathname = target.strip()
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elif 1 == len(target):
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pathname = str(target[0]).strip()
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else:
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raise SyntaxError("Lumiera Library builder requires exactly one target spec. Found target="+str(target))
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assert pathname
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(dirprefix, libname) = path.split(pathname)
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if not libname:
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raise ValueError("Library name missing. Only got a directory: "+pathname)
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soname = "${SHLIBPREFIX}%s$SHLIBSUFFIX" % libname
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assert soname
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return soname
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class LumieraPluginBuilder(LumieraModuleBuilder):
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def getCustomEnvironment(self, lumiEnv, target, **kw):
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""" in addition to the ModuleBuilder, define the Lumiera plugin suffix
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"""
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custEnv = LumieraModuleBuilder.getCustomEnvironment(self, lumiEnv, target, **kw)
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custEnv.Append (CPPDEFINES='LUMIERA_PLUGIN')
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custEnv.Replace(SHLIBPREFIX='', SHLIBSUFFIX='.lum')
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return custEnv
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def getBuildDestination(self, lumiEnv): return lumiEnv.path.buildPlug
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def getInstallDestination(self, lumiEnv): return lumiEnv.path.installPlug
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def register_LumieraCustomBuilders (lumiEnv):
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""" install the customised builder versions tightly integrated with our build system.
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Especially, these builders automatically add the build and installation locations
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and set the RPATH and SONAME in a way to allow a relocatable Lumiera directory structure
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"""
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programBuilder = LumieraExeBuilder (lumiEnv['BUILDERS']['Program'])
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libraryBuilder = LumieraModuleBuilder (lumiEnv['BUILDERS']['SharedLibrary'])
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smoduleBuilder = LumieraModuleBuilder (lumiEnv['BUILDERS']['LoadableModule'])
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lpluginBuilder = LumieraPluginBuilder (lumiEnv['BUILDERS']['LoadableModule'])
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lumiEnv['BUILDERS']['Program'] = programBuilder
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lumiEnv['BUILDERS']['SharedLibrary'] = libraryBuilder
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lumiEnv['BUILDERS']['LoadableModule'] = smoduleBuilder
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lumiEnv['BUILDERS']['LumieraPlugin'] = lpluginBuilder
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def SymLink(env, target, source, linktext=None):
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""" use python to create a symlink
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"""
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def makeLink(target,source,env):
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if linktext:
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dest = linktext
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else:
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dest = str(source[0])
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link = str(target[0])
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os.symlink(dest, link)
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if linktext: srcSpec=linktext
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else: srcSpec='$SOURCE'
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action = Action(makeLink, "Install link: $TARGET -> "+srcSpec)
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env.Command (target,source, action)
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# adding SymLink directly as method on the environment object
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# Probably that should better be a real builder, but I couldn't figure out
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# how to get the linktext through literally, which is necessary for relative links.
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# Judging from the sourcecode of SCons.Builder.BuilderBase, there seems to be no way
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# to set the executor_kw, which are passed through to the action object.
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lumiEnv.AddMethod(SymLink)
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