1 files changed, 570 insertions, 0 deletions

diff --git a/bitbake-dev/lib/bb/data.py b/bitbake-dev/lib/bb/data.py
new file mode 100644
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+++ b/bitbake-dev/lib/bb/data.py
@@ -0,0 +1,570 @@
+# ex:ts=4:sw=4:sts=4:et
+# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
+"""
+BitBake 'Data' implementations
+
+Functions for interacting with the data structure used by the
+BitBake build tools.
+
+The expandData and update_data are the most expensive
+operations. At night the cookie monster came by and
+suggested 'give me cookies on setting the variables and
+things will work out'. Taking this suggestion into account
+applying the skills from the not yet passed 'Entwurf und
+Analyse von Algorithmen' lecture and the cookie 
+monster seems to be right. We will track setVar more carefully
+to have faster update_data and expandKeys operations.
+
+This is a treade-off between speed and memory again but
+the speed is more critical here.
+"""
+
+# Copyright (C) 2003, 2004  Chris Larson
+# Copyright (C) 2005        Holger Hans Peter Freyther
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+#Based on functions from the base bb module, Copyright 2003 Holger Schurig
+
+import sys, os, re, time, types
+if sys.argv[0][-5:] == "pydoc":
+    path = os.path.dirname(os.path.dirname(sys.argv[1]))
+else:
+    path = os.path.dirname(os.path.dirname(sys.argv[0]))
+sys.path.insert(0,path)
+
+from bb import data_smart
+import bb
+
+_dict_type = data_smart.DataSmart
+
+def init():
+    return _dict_type()
+
+def init_db(parent = None):
+    if parent:
+        return parent.createCopy()
+    else:
+        return _dict_type()
+
+def createCopy(source):
+     """Link the source set to the destination
+     If one does not find the value in the destination set,
+     search will go on to the source set to get the value.
+     Value from source are copy-on-write. i.e. any try to
+     modify one of them will end up putting the modified value
+     in the destination set.
+     """
+     return source.createCopy()
+
+def initVar(var, d):
+    """Non-destructive var init for data structure"""
+    d.initVar(var)
+
+
+def setVar(var, value, d):
+    """Set a variable to a given value
+
+    Example:
+        >>> d = init()
+        >>> setVar('TEST', 'testcontents', d)
+        >>> print getVar('TEST', d)
+        testcontents
+    """
+    d.setVar(var,value)
+
+
+def getVar(var, d, exp = 0):
+    """Gets the value of a variable
+
+    Example:
+        >>> d = init()
+        >>> setVar('TEST', 'testcontents', d)
+        >>> print getVar('TEST', d)
+        testcontents
+    """
+    return d.getVar(var,exp)
+
+
+def renameVar(key, newkey, d):
+    """Renames a variable from key to newkey
+
+    Example:
+        >>> d = init()
+        >>> setVar('TEST', 'testcontents', d)
+        >>> renameVar('TEST', 'TEST2', d)
+        >>> print getVar('TEST2', d)
+        testcontents
+    """
+    d.renameVar(key, newkey)
+
+def delVar(var, d):
+    """Removes a variable from the data set
+
+    Example:
+        >>> d = init()
+        >>> setVar('TEST', 'testcontents', d)
+        >>> print getVar('TEST', d)
+        testcontents
+        >>> delVar('TEST', d)
+        >>> print getVar('TEST', d)
+        None
+    """
+    d.delVar(var)
+
+def setVarFlag(var, flag, flagvalue, d):
+    """Set a flag for a given variable to a given value
+
+    Example:
+        >>> d = init()
+        >>> setVarFlag('TEST', 'python', 1, d)
+        >>> print getVarFlag('TEST', 'python', d)
+        1
+    """
+    d.setVarFlag(var,flag,flagvalue)
+
+def getVarFlag(var, flag, d):
+    """Gets given flag from given var
+
+    Example:
+        >>> d = init()
+        >>> setVarFlag('TEST', 'python', 1, d)
+        >>> print getVarFlag('TEST', 'python', d)
+        1
+    """
+    return d.getVarFlag(var,flag)
+
+def delVarFlag(var, flag, d):
+    """Removes a given flag from the variable's flags
+
+    Example:
+        >>> d = init()
+        >>> setVarFlag('TEST', 'testflag', 1, d)
+        >>> print getVarFlag('TEST', 'testflag', d)
+        1
+        >>> delVarFlag('TEST', 'testflag', d)
+        >>> print getVarFlag('TEST', 'testflag', d)
+        None
+
+    """
+    d.delVarFlag(var,flag)
+
+def setVarFlags(var, flags, d):
+    """Set the flags for a given variable
+
+    Note:
+        setVarFlags will not clear previous
+        flags. Think of this method as
+        addVarFlags
+
+    Example:
+        >>> d = init()
+        >>> myflags = {}
+        >>> myflags['test'] = 'blah'
+        >>> setVarFlags('TEST', myflags, d)
+        >>> print getVarFlag('TEST', 'test', d)
+        blah
+    """
+    d.setVarFlags(var,flags)
+
+def getVarFlags(var, d):
+    """Gets a variable's flags
+
+    Example:
+        >>> d = init()
+        >>> setVarFlag('TEST', 'test', 'blah', d)
+        >>> print getVarFlags('TEST', d)['test']
+        blah
+    """
+    return d.getVarFlags(var)
+
+def delVarFlags(var, d):
+    """Removes a variable's flags
+
+    Example:
+        >>> data = init()
+        >>> setVarFlag('TEST', 'testflag', 1, data)
+        >>> print getVarFlag('TEST', 'testflag', data)
+        1
+        >>> delVarFlags('TEST', data)
+        >>> print getVarFlags('TEST', data)
+        None
+
+    """
+    d.delVarFlags(var)
+
+def keys(d):
+    """Return a list of keys in d
+
+    Example:
+        >>> d = init()
+        >>> setVar('TEST',  1, d)
+        >>> setVar('MOO' ,  2, d)
+        >>> setVarFlag('TEST', 'test', 1, d)
+        >>> keys(d)
+        ['TEST', 'MOO']
+    """
+    return d.keys()
+
+def getData(d):
+    """Returns the data object used"""
+    return d
+
+def setData(newData, d):
+    """Sets the data object to the supplied value"""
+    d = newData
+
+
+##
+## Cookie Monsters' query functions
+##
+def _get_override_vars(d, override):
+    """
+    Internal!!!
+
+    Get the Names of Variables that have a specific
+    override. This function returns a iterable
+    Set or an empty list
+    """
+    return []
+
+def _get_var_flags_triple(d):
+    """
+    Internal!!!
+
+    """
+    return []
+
+__expand_var_regexp__ = re.compile(r"\${[^{}]+}")
+__expand_python_regexp__ = re.compile(r"\${@.+?}")
+
+def expand(s, d, varname = None):
+    """Variable expansion using the data store.
+
+    Example:
+        Standard expansion:
+        >>> d = init()
+        >>> setVar('A', 'sshd', d)
+        >>> print expand('/usr/bin/${A}', d)
+        /usr/bin/sshd
+
+        Python expansion:
+        >>> d = init()
+        >>> print expand('result: ${@37 * 72}', d)
+        result: 2664
+
+        Shell expansion:
+        >>> d = init()
+        >>> print expand('${TARGET_MOO}', d)
+        ${TARGET_MOO}
+        >>> setVar('TARGET_MOO', 'yupp', d)
+        >>> print expand('${TARGET_MOO}',d)
+        yupp
+        >>> setVar('SRC_URI', 'http://somebug.${TARGET_MOO}', d)
+        >>> delVar('TARGET_MOO', d)
+        >>> print expand('${SRC_URI}', d)
+        http://somebug.${TARGET_MOO}
+    """
+    return d.expand(s, varname)
+
+def expandKeys(alterdata, readdata = None):
+    if readdata == None:
+        readdata = alterdata
+
+    todolist = {}
+    for key in keys(alterdata):
+        if not '${' in key:
+            continue
+
+        ekey = expand(key, readdata)
+        if key == ekey:
+            continue
+        todolist[key] = ekey
+
+    # These two for loops are split for performance to maximise the 
+    # usefulness of the expand cache
+
+    for key in todolist:
+        ekey = todolist[key]
+        renameVar(key, ekey, alterdata)
+
+def expandData(alterdata, readdata = None):
+    """For each variable in alterdata, expand it, and update the var contents.
+       Replacements use data from readdata.
+
+    Example:
+        >>> a=init()
+        >>> b=init()
+        >>> setVar("dlmsg", "dl_dir is ${DL_DIR}", a)
+        >>> setVar("DL_DIR", "/path/to/whatever", b)
+        >>> expandData(a, b)
+        >>> print getVar("dlmsg", a)
+        dl_dir is /path/to/whatever
+       """
+    if readdata == None:
+        readdata = alterdata
+
+    for key in keys(alterdata):
+        val = getVar(key, alterdata)
+        if type(val) is not types.StringType:
+            continue
+        expanded = expand(val, readdata)
+#       print "key is %s, val is %s, expanded is %s" % (key, val, expanded)
+        if val != expanded:
+            setVar(key, expanded, alterdata)
+
+import os
+
+def inheritFromOS(d):
+    """Inherit variables from the environment."""
+#   fakeroot needs to be able to set these
+    non_inherit_vars = [ "LD_LIBRARY_PATH", "LD_PRELOAD" ]
+    for s in os.environ.keys():
+        if not s in non_inherit_vars:
+            try:
+                setVar(s, os.environ[s], d)
+                setVarFlag(s, 'matchesenv', '1', d)
+            except TypeError:
+                pass
+
+import sys
+
+def emit_var(var, o=sys.__stdout__, d = init(), all=False):
+    """Emit a variable to be sourced by a shell."""
+    if getVarFlag(var, "python", d):
+        return 0
+
+    export = getVarFlag(var, "export", d)
+    unexport = getVarFlag(var, "unexport", d)
+    func = getVarFlag(var, "func", d)
+    if not all and not export and not unexport and not func:
+        return 0
+
+    try:
+        if all:
+            oval = getVar(var, d, 0)
+        val = getVar(var, d, 1)
+    except KeyboardInterrupt:
+        raise
+    except:
+        excname = str(sys.exc_info()[0])
+        if excname == "bb.build.FuncFailed":
+            raise
+        o.write('# expansion of %s threw %s\n' % (var, excname))
+        return 0
+
+    if all:
+        o.write('# %s=%s\n' % (var, oval))
+
+    if type(val) is not types.StringType:
+        return 0
+
+    if (var.find("-") != -1 or var.find(".") != -1 or var.find('{') != -1 or var.find('}') != -1 or var.find('+') != -1) and not all:
+        return 0
+
+    varExpanded = expand(var, d)
+
+    if unexport:
+        o.write('unset %s\n' % varExpanded)
+        return 1
+
+    if getVarFlag(var, 'matchesenv', d):
+        return 0
+
+    val.rstrip()
+    if not val:
+        return 0
+
+    if func:
+        # NOTE: should probably check for unbalanced {} within the var
+        o.write("%s() {\n%s\n}\n" % (varExpanded, val))
+        return 1
+
+    if export:
+        o.write('export ')
+
+    # if we're going to output this within doublequotes,
+    # to a shell, we need to escape the quotes in the var
+    alter = re.sub('"', '\\"', val.strip())
+    o.write('%s="%s"\n' % (varExpanded, alter))
+    return 1
+
+
+def emit_env(o=sys.__stdout__, d = init(), all=False):
+    """Emits all items in the data store in a format such that it can be sourced by a shell."""
+
+    env = keys(d)
+
+    for e in env:
+        if getVarFlag(e, "func", d):
+            continue
+        emit_var(e, o, d, all) and o.write('\n')
+
+    for e in env:
+        if not getVarFlag(e, "func", d):
+            continue
+        emit_var(e, o, d) and o.write('\n')
+
+def update_data(d):
+    """Modifies the environment vars according to local overrides and commands.
+    Examples:
+        Appending to a variable:
+        >>> d = init()
+        >>> setVar('TEST', 'this is a', d)
+        >>> setVar('TEST_append', ' test', d)
+        >>> setVar('TEST_append', ' of the emergency broadcast system.', d)
+        >>> update_data(d)
+        >>> print getVar('TEST', d)
+        this is a test of the emergency broadcast system.
+
+        Prepending to a variable:
+        >>> setVar('TEST', 'virtual/libc', d)
+        >>> setVar('TEST_prepend', 'virtual/tmake ', d)
+        >>> setVar('TEST_prepend', 'virtual/patcher ', d)
+        >>> update_data(d)
+        >>> print getVar('TEST', d)
+        virtual/patcher virtual/tmake virtual/libc
+
+        Overrides:
+        >>> setVar('TEST_arm', 'target', d)
+        >>> setVar('TEST_ramses', 'machine', d)
+        >>> setVar('TEST_local', 'local', d)
+        >>> setVar('OVERRIDES', 'arm', d)
+
+        >>> setVar('TEST', 'original', d)
+        >>> update_data(d)
+        >>> print getVar('TEST', d)
+        target
+
+        >>> setVar('OVERRIDES', 'arm:ramses:local', d)
+        >>> setVar('TEST', 'original', d)
+        >>> update_data(d)
+        >>> print getVar('TEST', d)
+        local
+
+        CopyMonster:
+        >>> e = d.createCopy()
+        >>> setVar('TEST_foo', 'foo', e)
+        >>> update_data(e)
+        >>> print getVar('TEST', e)
+        local
+
+        >>> setVar('OVERRIDES', 'arm:ramses:local:foo', e)
+        >>> update_data(e)
+        >>> print getVar('TEST', e)
+        foo
+
+        >>> f = d.createCopy()
+        >>> setVar('TEST_moo', 'something', f)
+        >>> setVar('OVERRIDES', 'moo:arm:ramses:local:foo', e)
+        >>> update_data(e)
+        >>> print getVar('TEST', e)
+        foo
+
+
+        >>> h = init()
+        >>> setVar('SRC_URI', 'file://append.foo;patch=1 ', h)
+        >>> g = h.createCopy()
+        >>> setVar('SRC_URI_append_arm', 'file://other.foo;patch=1', g)
+        >>> setVar('OVERRIDES', 'arm:moo', g)
+        >>> update_data(g)
+        >>> print getVar('SRC_URI', g)
+        file://append.foo;patch=1 file://other.foo;patch=1
+
+    """
+    bb.msg.debug(2, bb.msg.domain.Data, "update_data()")
+
+    # now ask the cookie monster for help
+    #print "Cookie Monster"
+    #print "Append/Prepend %s" % d._special_values
+    #print "Overrides      %s" % d._seen_overrides
+
+    overrides = (getVar('OVERRIDES', d, 1) or "").split(':') or []
+
+    #
+    # Well let us see what breaks here. We used to iterate
+    # over each variable and apply the override and then
+    # do the line expanding.
+    # If we have bad luck - which we will have - the keys
+    # where in some order that is so important for this
+    # method which we don't have anymore.
+    # Anyway we will fix that and write test cases this
+    # time.
+
+    #
+    # First we apply all overrides
+    # Then  we will handle _append and _prepend
+    #
+
+    for o in overrides:
+        # calculate '_'+override
+        l    = len(o)+1
+
+        # see if one should even try
+        if not d._seen_overrides.has_key(o):
+            continue
+
+        vars = d._seen_overrides[o]
+        for var in vars:
+            name = var[:-l]
+            try:
+                d[name] = d[var]
+            except:
+                bb.msg.note(1, bb.msg.domain.Data, "Untracked delVar")
+
+    # now on to the appends and prepends
+    if d._special_values.has_key('_append'):
+        appends = d._special_values['_append'] or []
+        for append in appends:
+            for (a, o) in getVarFlag(append, '_append', d) or []:
+                # maybe the OVERRIDE was not yet added so keep the append
+                if (o and o in overrides) or not o:
+                    delVarFlag(append, '_append', d)
+                if o and not o in overrides:
+                    continue
+
+                sval = getVar(append,d) or ""
+                sval+=a
+                setVar(append, sval, d)
+
+
+    if d._special_values.has_key('_prepend'):
+        prepends = d._special_values['_prepend'] or []
+
+        for prepend in prepends:
+            for (a, o) in getVarFlag(prepend, '_prepend', d) or []:
+                # maybe the OVERRIDE was not yet added so keep the prepend
+                if (o and o in overrides) or not o:
+                    delVarFlag(prepend, '_prepend', d)
+                if o and not o in overrides:
+                    continue
+
+                sval = a + (getVar(prepend,d) or "")
+                setVar(prepend, sval, d)
+
+
+def inherits_class(klass, d):
+    val = getVar('__inherit_cache', d) or []
+    if os.path.join('classes', '%s.bbclass' % klass) in val:
+        return True
+    return False
+
+def _test():
+    """Start a doctest run on this module"""
+    import doctest
+    from bb import data
+    doctest.testmod(data)
+
+if __name__ == "__main__":
+    _test()