stage.jam

C++的一个好库。。。现在很流行

#  Copyright (C) Vladimir Prus 2002. Permission to copy, use, modify, sell and
#  distribute this software is granted provided this copyright notice appears in
#  all copies. This software is provided "as is" without express or implied
#  warranty, and with no claim as to its suitability for any purpose.

#  This module defines the 'install' rule, used to copy a set of targets to
#  a single location

import targets ;
import "class" : new ;
import property ;
import errors : error ;
import type : type ;
import type ;
import regex ;
import generators ;
import feature ;
import project ;
import property-set ;
import virtual-target ;
import path ;

feature.feature <install-dependencies> : off on : incidental ;
feature.feature <install-type> : : free incidental ;
feature.feature <install-source-root> : : free path  ;
feature.feature <so-version> : : free incidental ;

class install-target-class : basic-target
{
    import feature project type errors generators path stage ;    
    import "class" : new ;
    
    rule __init__ ( name-and-dir : project : sources * : requirements * : default-build * )
    {
        basic-target.__init__ $(name-and-dir) : $(project) : $(sources) : $(requirements) 
          : $(default-build) ;
    }

    # If <location> is not set, sets it based on the project data.
    rule update-location ( property-set )
    {
        local loc = [ $(property-set).get <location> ] ;
        if ! $(loc)
        {
            loc = [ path.root $(self.name) [ $(self.project).get location ] ] ;

            property-set = [ $(property-set).add-raw $(loc:G=<location>) ] ;
        }
        
        return $(property-set) ;
    }
            
    # Takes a target that is installed and property set which is
    # used when installing.
    rule adjust-properties ( target : build-property-set )
    {
        local ps-raw ;
        local a = [ $(target).action ] ;       
        if $(a)
        {
            local ps = [ $(a).properties ] ;
            ps-raw = [ $(ps).raw ] ;
                        
            # Unless <hardcode-dll-paths>true is in properties, which can
            # happen only if the user has explicitly requested it, nuke all
            # <dll-path> properties                                  
            if [ $(property-set).get <hardcode-dll-paths> ] != true
            {
                ps-raw = [ property.change $(ps-raw) : <dll-path> ] ;
            }
            
            # If any <dll-path> properties were specified for installing,
            # add them.
            local l = [ $(build-property-set).get <dll-path> ] ;
            ps-raw += $(l:G=<dll-path>) ;
        }
        
        # Remove the <tag> feature on original targets.
        ps-raw = [ property.change $(ps-raw) : <tag> ] ;
        # And <location>. If stage target has another stage target
        # in sources, then we'll get virtual targets with <location>
        # property set.
        ps-raw = [ property.change $(ps-raw) : <location> ] ;
        
        
        local d = [ $(build-property-set).get <dependency> ] ;
        ps-raw += $(d:G=<dependency>) ;
        
        local d = [ $(build-property-set).get <location> ] ;
        ps-raw += $(d:G=<location>) ;
        
        local d = [ $(build-property-set).get <install-source-root> ] ;
        # Make the path absolute: we'll use it to compute relative
        # paths and making the path absolute will help.
        if $(d)
        {            
            d = [ path.root $(d) [ path.pwd ] ] ;
            ps-raw += $(d:G=<install-source-root>) ;
        }        
        
        if $(ps-raw)
        {
            return [ property-set.create $(ps-raw) ]  ;
        }        
        else
        {
            return [ property-set.empty ] ;
        }        
    }
    
        
    rule construct ( name : source-targets * : property-set )
    {        
        source-targets = [ 
          targets-to-stage $(source-targets) : $(property-set) ] ;
        
        property-set = [ update-location $(property-set) ] ;          
                                       
        local result ;
        for local i in $(source-targets)
        {            
            local staged-targets ;
                        
            local new-properties = 
              [ adjust-properties $(i) : $(property-set) ] ;
                                    
            # See if something special should be done when staging this
            # type. It is indicated by presense of special "staged" type            
            local t = [ $(i).type ] ;            
            if $(t) && [ type.registered INSTALLED_$(t) ]
            {
                local targets = [ generators.construct $(self.project) $(name) : 
                  INSTALLED_$(t) : $(new-properties) : $(i) : * ] ;
                staged-targets += $(targets[2-]) ;                                
            }
            else             
            {                
                staged-targets = [ stage.copy-file $(self.project) 
                  : $(i) : $(new-properties) ] ;
            }
            
            if ! $(staged-targets)
            {                    
                errors.error "Unable to generate staged version of " [ $(source).str ] ;
            }                
            
            for t in $(staged-targets) 
            {
                result += [ virtual-target.register $(t) ] ;          
            }            
        }
        
        return [ property-set.empty ] $(result) ;
    }   
    

    # Given the list of source targets explicitly passed to 'stage',
    # returns the list of targets which must be staged.
    rule targets-to-stage ( source-targets * : property-set )
    {   
        local result ;
        
        # Traverse the dependencies, if needed.
        if [ $(property-set).get <install-dependencies> ] = "on"
        {
            source-targets = [ collect-targets $(source-targets) ] ;
        }
        
        # Filter the target types, if needed
        local included-types = [ $(property-set).get <install-type> ] ;                               
        for local r in $(source-targets)
        {
            local ty = [ $(r).type ] ;        
            if $(ty)
            {
                # Don't stage searched libs.
                if $(ty) != SEARCHED_LIB
                {
                    if $(included-types)
                    {                        
                        if [ include-type $(ty) : $(included-types) ]
                        {
                            result += $(r) ;
                        }                                    
                    }                
                    else
                    {
                        result += $(r) ;                        
                    }   
                }                
            }
            else
            {
                result += $(r) ;
            }
        }
                
        return $(result) ;
    }
    
    # CONSIDER: figure out why we can't use virtual-target.traverse here.
    rule collect-targets ( targets * )
    {
        # Find subvariants
        local s ;        
        for local t in $(targets)
        {
            s += [ $(t).creating-subvariant ] ;
        }
        s = [ sequence.unique $(s) ] ;
        
        local result = $(targets) ;
        for local i in $(s)
        {
            result += [ $(i).all-referenced-targets ] ;
        }
        local result2 ;
        for local r in $(result)
        {
            if $(r:G) != <use>
            {
                result2 += $(r:G=) ;
            }            
        }        
        result = [ sequence.unique $(result2) ] ;        
    }
                
    # Returns true iff 'type' is subtype of some element of 'types-to-include'.
    local rule include-type ( type : types-to-include * )
    {
        local found ;
        while $(types-to-include) && ! $(found)
        {
            if [ type.is-subtype $(type) $(types-to-include[1]) ]
            {
                found = true ;
            }            
            types-to-include = $(types-to-include[2-]) ;
        }
        
        return $(found) ;
    }            
}

# Creates a copy of target 'source'. The 'properties' object should
# have a <location> property which specifies where the target must
# be placed.
rule copy-file ( project : source : properties )
{   
    local targets ;
    local name = [ $(source).name ] ;
               
    new-a = [ new action $(source) : common.copy : $(properties) ] ;