path.jam

C++的一个好库。。。现在很流行

    }
    
    if $(native) = ""
    {
        result = "." ;
    }
        
    return $(result) ;
}

rule native-NT ( path )
{
    local result = [ MATCH "^/?(.*)" : $(path) ] ;
    result = [ sequence.join [ regex.split $(result) "/" ] : "\\" ] ;
    return $(result) ;
}

rule make-UNIX ( native )
{
    # VP: I have no idea now 'native' can be empty here! But it can!
    if $(native) = ""
    {
        errors.error "Empty path passed to 'make-UNIX'" ;
    }
    else
    {        
        return [ NORMALIZE_PATH $(native:T) ] ;
    }    
}

rule native-UNIX ( path )
{
    return $(path) ;
}

rule make-CYGWIN ( path )
{
    return [ make-NT $(path) ] ;
}

rule native-CYGWIN ( path )
{
    local result = $(path) ;
    if [ regex.match "(^/.:)" : $(path)  ] # win absolute
    {
        result = [ MATCH "^/?(.*)" : $(path) ] ; # remove leading '/'
    }
    return [ native-UNIX $(result) ] ;
}

#
# split-VMS: splits input native path into
# device dir file (each part is optional),
# example:
#
# dev:[dir]file.c => dev: [dir] file.c
#
rule split-path-VMS ( native )
{
    local matches = [ MATCH ([a-zA-Z0-9_-]+:)?(\\[[^\]]*\\])?(.*)?$   : $(native) ] ;
    local device = $(matches[1]) ;
    local dir = $(matches[2]) ;
    local file = $(matches[3]) ;

    return $(device) $(dir) $(file) ;
}

#
# Converts a native VMS path into a portable path spec.
#
# Does not handle current-device absolute paths such
# as "[dir]File.c" as it is not clear how to represent
# them in the portable path notation.
#
# Adds a trailing dot (".") to the file part if no extension
# is present (helps when converting it back into native path).
#
rule make-VMS ( native )
{
    if [ MATCH ^(\\[[a-zA-Z0-9]) : $(native) ]
    {
        errors.error "Can't handle default-device absolute paths: " $(native) ;
    }
        
    local parts = [ split-path-VMS $(native) ] ;
    local device = $(parts[1]) ;
    local dir = $(parts[2]) ;
    local file = $(parts[3]) ;
    local elems ;
    
    if $(device)
    {
        #
        # rooted
        #
        elems = /$(device) ;
    }
    
    if $(dir) = "[]"
    {
        #
        # Special case: current directory
        #
        elems = $(elems) "." ;
    }
    else if $(dir)
    {
        dir = [ regex.replace $(dir) "\\[|\\]" "" ] ;
        local dir_parts = [ regex.split $(dir) \\. ]  ;
    
        if $(dir_parts[1]) = ""
        {
            #
            # Relative path
            #
            dir_parts = $(dir_parts[2--1]) ;
        }
        
        #
        # replace "parent-directory" parts (- => ..)
        #
        dir_parts = [ regex.replace-list $(dir_parts) : - : .. ] ;
        
        elems = $(elems) $(dir_parts) ;
    }
    
    if $(file)
    {
        if ! [ MATCH (\\.) : $(file) ]
        {
            #
            # Always add "." to end of non-extension file
            #
            file = $(file). ;
        }
        elems = $(elems) $(file) ;
    }

    local portable = [ path.join $(elems) ] ;

    return $(portable) ;
}

#
# Converts a portable path spec into a native VMS path.
#
# Relies on having at least one dot (".") included in the file
# name to be able to differentiate it ftom the directory part.
#
rule native-VMS ( path )
{
    local device = "" ;
    local dir = $(path) ;
    local file = "" ;
    local native ;
    local split ;

    #
    # Has device ?
    #
    if [ is-rooted $(dir) ]
    {
        split = [ MATCH ^/([^:]+:)/?(.*) : $(dir) ] ;
        device = $(split[1]) ;
        dir = $(split[2]) ;
    }

    #
    # Has file ?
    #
    # This is no exact science, just guess work:
    #
    # If the last part of the current path spec
    # includes some chars, followed by a dot,
    # optionally followed by more chars -
    # then it is a file (keep your fingers crossed).
    #
    split = [ regex.split $(dir) / ] ;
    local maybe_file = $(split[-1]) ;

    if [ MATCH ^([^.]+\\..*) : $(maybe_file) ]
    {
        file = $(maybe_file) ;
        dir = [ sequence.join $(split[1--2]) : / ] ;
    }
    
    #
    # Has dir spec ?
    #
    if $(dir) = "."
    {
        dir = "[]" ;
    }
    else if $(dir)
    {
        dir = [ regex.replace $(dir) \\.\\. - ] ;
        dir = [ regex.replace $(dir) / . ] ;

        if $(device) = ""
        {
            #
            # Relative directory
            # 
            dir = "."$(dir) ;
        }
        dir = "["$(dir)"]" ;
    }
    
    native = [ sequence.join $(device) $(dir) $(file) ] ;

    return $(native) ;
}


rule __test__ ( ) {

    import assert ;
    import errors : try catch ;

    assert.true is-rooted "/" ;
    assert.true is-rooted "/foo" ;
    assert.true is-rooted "/foo/bar" ;
    assert.result : is-rooted "." ;
    assert.result : is-rooted "foo" ;
    assert.result : is-rooted "foo/bar" ;

    assert.true has-parent "foo" ;
    assert.true has-parent "foo/bar" ;
    assert.true has-parent "." ;
    assert.result : has-parent "/" ;

    assert.result "." : basename "." ;
    assert.result ".." : basename ".." ;
    assert.result "foo" : basename "foo" ;
    assert.result "foo" : basename "bar/foo" ;
    assert.result "foo" : basename "gaz/bar/foo" ;
    assert.result "foo" : basename "/gaz/bar/foo" ;

    assert.result "." : parent "foo" ;
    assert.result "/" : parent "/foo" ;
    assert.result "foo/bar" : parent "foo/bar/giz" ;
    assert.result ".." : parent "." ;
    assert.result ".." : parent "../foo" ;
    assert.result "../../foo" : parent "../../foo/bar" ;


    assert.result "." : reverse "." ;
    assert.result ".." : reverse "foo" ;
    assert.result "../../.." : reverse "foo/bar/giz" ;

    assert.result "foo" : join "foo" ;
    assert.result "/foo" : join "/" "foo" ;
    assert.result "foo/bar" : join "foo" "bar" ;
    assert.result "foo/bar" : join "foo/giz" "../bar" ;
    assert.result "foo/giz" : join "foo/bar/baz" "../../giz" ;
    assert.result ".." : join "." ".." ;
    assert.result ".." : join "foo" "../.." ;
    assert.result "../.." : join "../foo" "../.." ;
    assert.result "/foo" : join "/bar" "../foo" ;
    assert.result "foo/giz" : join "foo/giz" "." ;
    assert.result "." : join lib2 ".." ;
    assert.result "/" : join "/a" ".." ;

    assert.result /a/b : join /a/b/c .. ;

    assert.result "foo/bar/giz" : join "foo" "bar" "giz" ;
    assert.result "giz" : join "foo" ".." "giz" ;
    assert.result "foo/giz" : join "foo" "." "giz" ;

    try ;
    {
        join "a" "/b" ;
    }
    catch only first element may be rooted ;

    local CWD = "/home/ghost/build" ;
    assert.result : all-parents . : . : $(CWD) ;
    assert.result . .. ../.. ../../..  : all-parents "Jamfile" : "" : $(CWD) ;
    assert.result foo . .. ../.. ../../.. : all-parents "foo/Jamfile" : "" : $(CWD) ;
    assert.result ../Work .. ../.. ../../.. : all-parents "../Work/Jamfile" : "" : $(CWD) ;

    local CWD = "/home/ghost" ;
    assert.result . .. : all-parents "Jamfile" : "/home" : $(CWD) ;
    assert.result . : all-parents "Jamfile" : "/home/ghost" : $(CWD) ;
    
    assert.result "c/d" : relative "a/b/c/d" "a/b" ;
    assert.result "foo" : relative "foo" "." ;

    local save-os = [ modules.peek path : os ] ;
    modules.poke path : os : NT ;

    assert.result "foo/bar/giz" : make "foo/bar/giz" ;
    assert.result "foo/bar/giz" : make "foo\\bar\\giz" ;
    assert.result "foo" : make "foo/." ;
    assert.result "foo" : make "foo/bar/.." ;
    assert.result "/D:/My Documents" : make "D:\\My Documents" ;
    assert.result "/c:/boost/tools/build/new/project.jam" : make "c:\\boost\\tools\\build\\test\\..\\new\\project.jam" ;

    assert.result "foo\\bar\\giz" : native "foo/bar/giz" ;
    assert.result "foo" : native "foo" ;
    assert.result "D:\\My Documents\\Work" : native "/D:/My Documents/Work" ;

    modules.poke path : os : UNIX ;

    assert.result "foo/bar/giz" : make "foo/bar/giz" ;
    assert.result "/sub1" : make "/sub1/." ;
    assert.result "/sub1" : make "/sub1/sub2/.." ;    
    assert.result "sub1" : make "sub1/." ;
    assert.result "sub1" : make "sub1/sub2/.." ;
    assert.result "/foo/bar" : native "/foo/bar" ;

    modules.poke path : os : VMS ;

    #
    # Don't really need to poke os before these
    #
    assert.result "disk:" "[dir]"  "file" : split-path-VMS "disk:[dir]file" ;
    assert.result "disk:" "[dir]"  ""     : split-path-VMS "disk:[dir]" ;
    assert.result "disk:" ""     ""       : split-path-VMS "disk:" ;
    assert.result "disk:" ""     "file"   : split-path-VMS "disk:file" ;
    assert.result ""      "[dir]"  "file" : split-path-VMS "[dir]file" ;
    assert.result ""      "[dir]"  ""     : split-path-VMS "[dir]" ;
    assert.result ""      ""     "file"   : split-path-VMS "file" ;
    assert.result ""      ""     ""       : split-path-VMS "" ;

    #
    # Special case: current directory
    #
    assert.result ""      "[]"     ""     : split-path-VMS "[]" ;
    assert.result "disk:" "[]"     ""     : split-path-VMS "disk:[]" ;
    assert.result ""      "[]"     "file" : split-path-VMS "[]file" ;
    assert.result "disk:" "[]"     "file" : split-path-VMS "disk:[]file" ;

    #
    # Make portable paths
    #
    assert.result "/disk:" : make "disk:" ;
    assert.result "foo/bar/giz" : make "[.foo.bar.giz]" ;
    assert.result "foo" : make "[.foo]" ;
    assert.result "foo" : make "[.foo.bar.-]" ;
    assert.result ".." : make "[.-]" ;
    assert.result ".." : make "[-]" ;
    assert.result "." : make "[]" ;
    assert.result "giz.h" : make "giz.h" ;
    assert.result "foo/bar/giz.h" : make "[.foo.bar]giz.h" ;
    assert.result "/disk:/my_docs" : make "disk:[my_docs]" ;
    assert.result "/disk:/boost/tools/build/new/project.jam" : make "disk:[boost.tools.build.test.-.new]project.jam" ;

    #
    # Special case (adds '.' to end of file w/o extension to
    # disambiguate from directory in portable path spec).
    #
    assert.result "Jamfile." : make "Jamfile" ;
    assert.result "dir/Jamfile." : make "[.dir]Jamfile" ;
    assert.result "/disk:/dir/Jamfile." : make "disk:[dir]Jamfile" ;

    #
    # Make native paths
    #
    assert.result "disk:" : native "/disk:" ;
    assert.result "[.foo.bar.giz]" : native "foo/bar/giz" ;
    assert.result "[.foo]" : native "foo" ;
    assert.result "[.-]" : native ".." ;
    assert.result "[.foo.-]" : native "foo/.." ;
    assert.result "[]" : native "." ;
    assert.result "disk:[my_docs.work]" : native "/disk:/my_docs/work" ;
    assert.result "giz.h" : native "giz.h" ;
    assert.result "disk:Jamfile." : native "/disk:Jamfile." ;
    assert.result "disk:[my_docs.work]Jamfile." : native "/disk:/my_docs/work/Jamfile." ;

    modules.poke path : os : $(save-os) ;

}