"""SCons.Tool.jar

Tool-specific initialization for jar.

There normally shouldn't be any need to import this module directly.
It will usually be imported through the generic SCons.Tool.Tool()
selection method.

"""

#
# __COPYRIGHT__
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

import SCons.Subst
import SCons.Util
from SCons.Node.FS import _my_normcase
import os

def jarSources(target, source, env, for_signature):
    """Only include sources that are not a manifest file."""
    try:
        env['JARCHDIR']
    except KeyError:
        jarchdir_set = False
    else:
        jarchdir_set = True
        jarchdir = env.subst('$JARCHDIR', target=target, source=source)
        if jarchdir:
            jarchdir = env.fs.Dir(jarchdir)
    result = []
    for src in source:
        contents = src.get_text_contents()
        if contents[:16] != "Manifest-Version":
            if jarchdir_set:
                _chdir = jarchdir
            else:
                try:
                    _chdir = src.attributes.java_classdir
                except AttributeError:
                    _chdir = None
            if _chdir:
                # If we are changing the dir with -C, then sources should
                # be relative to that directory.
                src = SCons.Subst.Literal(src.get_path(_chdir))
                result.append('-C')
                result.append(_chdir)
            result.append(src)
    return result

def jarManifest(target, source, env, for_signature):
    """Look in sources for a manifest file, if any."""
    for src in source:
        contents = src.get_text_contents()
        if contents[:16] == "Manifest-Version":
            return src
    return ''

def jarFlags(target, source, env, for_signature):
    """If we have a manifest, make sure that the 'm'
    flag is specified."""
    jarflags = env.subst('$JARFLAGS', target=target, source=source)
    for src in source:
        contents = src.get_text_contents()
        if contents[:16] == "Manifest-Version":
            if not 'm' in jarflags:
                return jarflags + 'm'
            break
    return jarflags

def Jar(env, target = None, source = [], *args, **kw):
    """
    A pseudo-Builder wrapper around the separate Jar sources{File,Dir}
    Builders.
    """

    # jar target should not be a list so assume they passed
    # no target and want implicit target to be made and the arg
    # was actaully the list of sources
    if SCons.Util.is_List(target) and source == []:
        SCons.Warnings.Warning("Making implicit target jar file, " +
                              "and treating the list as sources")
        source = target
        target = None

    # mutiple targets pass so build each target the same from the 
    # same source
    #TODO Maybe this should only be done once, and the result copied
    #     for each target since it should result in the same?
    if SCons.Util.is_List(target) and SCons.Util.is_List(source):
        jars = []
        for single_target in target:
            jars += env.Jar( target = single_target, source = source, *args, **kw)
        return jars

    # they passed no target so make a target implicitly
    if target == None:
        try:
            # make target from the first source file
            target = os.path.splitext(str(source[0]))[0] + env.subst('$JARSUFFIX')
        except:
            # something strange is happening but attempt anyways
            SCons.Warnings.Warning("Could not make implicit target from sources, using directory")
            target = os.path.basename(str(env.Dir('.'))) + env.subst('$JARSUFFIX')

    # make lists out of our target and sources
    if not SCons.Util.is_List(target):
        target = [target]
    if not SCons.Util.is_List(source):
        source = [source]

    # setup for checking through all the sources and handle accordingly
    java_class_suffix = env.subst('$JAVACLASSSUFFIX')
    java_suffix = env.subst('$JAVASUFFIX')
    target_classes = []

    # function for determining what to do with a file and not a directory
    # if its already a class file then it can be used as a
    # source for jar, otherwise turn it into a class file then
    # return the source
    def file_to_class(s):
        if(str(_my_normcase(s)).endswith(java_suffix)):
            return env.JavaClassFile(source = s, *args, **kw)
        else:
            return [env.fs.File(s)]

    # In the case that we are passed just string to a node which is directory
    # but does not exist, we need to check all the current targets to see if
    # that directory is going to exist so we can add it as a source to Jar builder
    def get_all_targets(env, node='.'):
        def get_all_targets_iter(env, node):
            if node.has_builder():
                yield node
            for kid in node.all_children():
                for kid in get_all_targets(env, kid):
                    yield kid
        node = env.arg2nodes(node, env.fs.Entry)[0]
        return list(get_all_targets_iter(env, node))

    # loop through the sources and handle each accordingly
    # the goal here is to get all the source files into a class
    # file or a directory that contains class files
    for s in source:
        s = env.subst(s)
        if isinstance(s, SCons.Node.FS.Base):
            if isinstance(s, SCons.Node.FS.File):
                # found a file so make sure its a class file
                target_classes.extend(file_to_class(s))
            else:
                # found a dir so make sure its a dir of class files
                target_classes.extend(env.JavaClassDir(source = env.fs.Dir(s), *args, **kw))
        else:
            if os.path.isfile(s):
                # found a file that exists on the FS, make sure its a class file
                target_classes.extend(file_to_class(s))
            elif os.path.isdir(s):
                # found a dir on the FS, add it as a dir of class files
                target_classes.append(env.fs.Dir(s))
            elif s[-len(java_suffix):] == java_suffix or s[-len(java_class_suffix):] == java_class_suffix:
                # found a file that may not exists and is only a string
                # so add it after converting it to a class file
                target_classes.extend(file_to_class(s))
            else:
                # found a swig file so add it after converting it to class files
                if(os.path.splitext(str(s))[1] == ".i"):
                    target_classes.extend(env.JavaClassFile(source = s, *args, **kw))
                else:
                    # found a directory that does not yet exist, but can exist as a node
                    # check the target nodes to make sure it will be built, then add
                    # it as a source
                    for node in get_all_targets(env):
                        if(s in str(node) and os.path.splitext(str(node))[1] == ""):
                            target_classes.append(node)
    # at this point all our sources have been converted to classes or directories of class
    # so pass it to the Jar builder
    return env.JarFile(target = target, source = target_classes, *args, **kw)

def generate(env):
    """Add Builders and construction variables for jar to an Environment."""
    SCons.Tool.CreateJarBuilder(env)

    SCons.Tool.CreateJavaFileBuilder(env)
    SCons.Tool.CreateJavaClassFileBuilder(env)
    SCons.Tool.CreateJavaClassDirBuilder(env)

    env.AddMethod(Jar)

    env['JAR']        = 'jar'
    env['JARFLAGS']   = SCons.Util.CLVar('cf')
    env['_JARFLAGS']  = jarFlags
    env['_JARMANIFEST'] = jarManifest
    env['_JARSOURCES'] = jarSources
    env['_JARCOM']    = '$JAR $_JARFLAGS $TARGET $_JARMANIFEST $_JARSOURCES'
    env['JARCOM']     = "${TEMPFILE('$_JARCOM','$JARCOMSTR')}"
    env['JARSUFFIX']  = '.jar'

def exists(env):
    # As reported by Jan Nijtmans in issue #2730, the simple
    #    return env.Detect('jar')
    # doesn't always work during initialization. For now, we
    # stop trying to detect an executable (analogous to the
    # javac Builder).
    # TODO: Come up with a proper detect() routine...and enable it.
    return 1

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