xref: /openbmc/openbmc/poky/bitbake/lib/bb/parse/ast.py (revision 15ae2509) 
1"""
2 AbstractSyntaxTree classes for the Bitbake language
3"""
4
5# Copyright (C) 2003, 2004 Chris Larson
6# Copyright (C) 2003, 2004 Phil Blundell
7# Copyright (C) 2009 Holger Hans Peter Freyther
8#
9# SPDX-License-Identifier: GPL-2.0-only
10#
11
12import re
13import string
14import logging
15import bb
16import itertools
17from bb import methodpool
18from bb.parse import logger
19
20class StatementGroup(list):
21    def eval(self, data):
22        for statement in self:
23            statement.eval(data)
24
25class AstNode(object):
26    def __init__(self, filename, lineno):
27        self.filename = filename
28        self.lineno = lineno
29
30class IncludeNode(AstNode):
31    def __init__(self, filename, lineno, what_file, force):
32        AstNode.__init__(self, filename, lineno)
33        self.what_file = what_file
34        self.force = force
35
36    def eval(self, data):
37        """
38        Include the file and evaluate the statements
39        """
40        s = data.expand(self.what_file)
41        logger.debug(2, "CONF %s:%s: including %s", self.filename, self.lineno, s)
42
43        # TODO: Cache those includes... maybe not here though
44        if self.force:
45            bb.parse.ConfHandler.include(self.filename, s, self.lineno, data, "include required")
46        else:
47            bb.parse.ConfHandler.include(self.filename, s, self.lineno, data, False)
48
49class ExportNode(AstNode):
50    def __init__(self, filename, lineno, var):
51        AstNode.__init__(self, filename, lineno)
52        self.var = var
53
54    def eval(self, data):
55        data.setVarFlag(self.var, "export", 1, op = 'exported')
56
57class UnsetNode(AstNode):
58    def __init__(self, filename, lineno, var):
59        AstNode.__init__(self, filename, lineno)
60        self.var = var
61
62    def eval(self, data):
63        loginfo = {
64            'variable': self.var,
65            'file': self.filename,
66            'line': self.lineno,
67        }
68        data.delVar(self.var,**loginfo)
69
70class UnsetFlagNode(AstNode):
71    def __init__(self, filename, lineno, var, flag):
72        AstNode.__init__(self, filename, lineno)
73        self.var = var
74        self.flag = flag
75
76    def eval(self, data):
77        loginfo = {
78            'variable': self.var,
79            'file': self.filename,
80            'line': self.lineno,
81        }
82        data.delVarFlag(self.var, self.flag, **loginfo)
83
84class DataNode(AstNode):
85    """
86    Various data related updates. For the sake of sanity
87    we have one class doing all this. This means that all
88    this need to be re-evaluated... we might be able to do
89    that faster with multiple classes.
90    """
91    def __init__(self, filename, lineno, groupd):
92        AstNode.__init__(self, filename, lineno)
93        self.groupd = groupd
94
95    def getFunc(self, key, data):
96        if 'flag' in self.groupd and self.groupd['flag'] != None:
97            return data.getVarFlag(key, self.groupd['flag'], expand=False, noweakdefault=True)
98        else:
99            return data.getVar(key, False, noweakdefault=True, parsing=True)
100
101    def eval(self, data):
102        groupd = self.groupd
103        key = groupd["var"]
104        loginfo = {
105            'variable': key,
106            'file': self.filename,
107            'line': self.lineno,
108        }
109        if "exp" in groupd and groupd["exp"] != None:
110            data.setVarFlag(key, "export", 1, op = 'exported', **loginfo)
111
112        op = "set"
113        if "ques" in groupd and groupd["ques"] != None:
114            val = self.getFunc(key, data)
115            op = "set?"
116            if val == None:
117                val = groupd["value"]
118        elif "colon" in groupd and groupd["colon"] != None:
119            e = data.createCopy()
120            op = "immediate"
121            val = e.expand(groupd["value"], key + "[:=]")
122        elif "append" in groupd and groupd["append"] != None:
123            op = "append"
124            val = "%s %s" % ((self.getFunc(key, data) or ""), groupd["value"])
125        elif "prepend" in groupd and groupd["prepend"] != None:
126            op = "prepend"
127            val = "%s %s" % (groupd["value"], (self.getFunc(key, data) or ""))
128        elif "postdot" in groupd and groupd["postdot"] != None:
129            op = "postdot"
130            val = "%s%s" % ((self.getFunc(key, data) or ""), groupd["value"])
131        elif "predot" in groupd and groupd["predot"] != None:
132            op = "predot"
133            val = "%s%s" % (groupd["value"], (self.getFunc(key, data) or ""))
134        else:
135            val = groupd["value"]
136
137        flag = None
138        if 'flag' in groupd and groupd['flag'] != None:
139            flag = groupd['flag']
140        elif groupd["lazyques"]:
141            flag = "_defaultval"
142
143        loginfo['op'] = op
144        loginfo['detail'] = groupd["value"]
145
146        if flag:
147            data.setVarFlag(key, flag, val, **loginfo)
148        else:
149            data.setVar(key, val, parsing=True, **loginfo)
150
151class MethodNode(AstNode):
152    tr_tbl = str.maketrans('/.+-@%&', '_______')
153
154    def __init__(self, filename, lineno, func_name, body, python, fakeroot):
155        AstNode.__init__(self, filename, lineno)
156        self.func_name = func_name
157        self.body = body
158        self.python = python
159        self.fakeroot = fakeroot
160
161    def eval(self, data):
162        text = '\n'.join(self.body)
163        funcname = self.func_name
164        if self.func_name == "__anonymous":
165            funcname = ("__anon_%s_%s" % (self.lineno, self.filename.translate(MethodNode.tr_tbl)))
166            self.python = True
167            text = "def %s(d):\n" % (funcname) + text
168            bb.methodpool.insert_method(funcname, text, self.filename, self.lineno - len(self.body) - 1)
169            anonfuncs = data.getVar('__BBANONFUNCS', False) or []
170            anonfuncs.append(funcname)
171            data.setVar('__BBANONFUNCS', anonfuncs)
172        if data.getVar(funcname, False):
173            # clean up old version of this piece of metadata, as its
174            # flags could cause problems
175            data.delVarFlag(funcname, 'python')
176            data.delVarFlag(funcname, 'fakeroot')
177        if self.python:
178            data.setVarFlag(funcname, "python", "1")
179        if self.fakeroot:
180            data.setVarFlag(funcname, "fakeroot", "1")
181        data.setVarFlag(funcname, "func", 1)
182        data.setVar(funcname, text, parsing=True)
183        data.setVarFlag(funcname, 'filename', self.filename)
184        data.setVarFlag(funcname, 'lineno', str(self.lineno - len(self.body)))
185
186class PythonMethodNode(AstNode):
187    def __init__(self, filename, lineno, function, modulename, body):
188        AstNode.__init__(self, filename, lineno)
189        self.function = function
190        self.modulename = modulename
191        self.body = body
192
193    def eval(self, data):
194        # Note we will add root to parsedmethods after having parse
195        # 'this' file. This means we will not parse methods from
196        # bb classes twice
197        text = '\n'.join(self.body)
198        bb.methodpool.insert_method(self.modulename, text, self.filename, self.lineno - len(self.body) - 1)
199        data.setVarFlag(self.function, "func", 1)
200        data.setVarFlag(self.function, "python", 1)
201        data.setVar(self.function, text, parsing=True)
202        data.setVarFlag(self.function, 'filename', self.filename)
203        data.setVarFlag(self.function, 'lineno', str(self.lineno - len(self.body) - 1))
204
205class ExportFuncsNode(AstNode):
206    def __init__(self, filename, lineno, fns, classname):
207        AstNode.__init__(self, filename, lineno)
208        self.n = fns.split()
209        self.classname = classname
210
211    def eval(self, data):
212
213        for func in self.n:
214            calledfunc = self.classname + "_" + func
215
216            if data.getVar(func, False) and not data.getVarFlag(func, 'export_func', False):
217                continue
218
219            if data.getVar(func, False):
220                data.setVarFlag(func, 'python', None)
221                data.setVarFlag(func, 'func', None)
222
223            for flag in [ "func", "python" ]:
224                if data.getVarFlag(calledfunc, flag, False):
225                    data.setVarFlag(func, flag, data.getVarFlag(calledfunc, flag, False))
226            for flag in [ "dirs" ]:
227                if data.getVarFlag(func, flag, False):
228                    data.setVarFlag(calledfunc, flag, data.getVarFlag(func, flag, False))
229            data.setVarFlag(func, "filename", "autogenerated")
230            data.setVarFlag(func, "lineno", 1)
231
232            if data.getVarFlag(calledfunc, "python", False):
233                data.setVar(func, "    bb.build.exec_func('" + calledfunc + "', d)\n", parsing=True)
234            else:
235                if "-" in self.classname:
236                   bb.fatal("The classname %s contains a dash character and is calling an sh function %s using EXPORT_FUNCTIONS. Since a dash is illegal in sh function names, this cannot work, please rename the class or don't use EXPORT_FUNCTIONS." % (self.classname, calledfunc))
237                data.setVar(func, "    " + calledfunc + "\n", parsing=True)
238            data.setVarFlag(func, 'export_func', '1')
239
240class AddTaskNode(AstNode):
241    def __init__(self, filename, lineno, func, before, after):
242        AstNode.__init__(self, filename, lineno)
243        self.func = func
244        self.before = before
245        self.after = after
246
247    def eval(self, data):
248        bb.build.addtask(self.func, self.before, self.after, data)
249
250class DelTaskNode(AstNode):
251    def __init__(self, filename, lineno, func):
252        AstNode.__init__(self, filename, lineno)
253        self.func = func
254
255    def eval(self, data):
256        bb.build.deltask(self.func, data)
257
258class BBHandlerNode(AstNode):
259    def __init__(self, filename, lineno, fns):
260        AstNode.__init__(self, filename, lineno)
261        self.hs = fns.split()
262
263    def eval(self, data):
264        bbhands = data.getVar('__BBHANDLERS', False) or []
265        for h in self.hs:
266            bbhands.append(h)
267            data.setVarFlag(h, "handler", 1)
268        data.setVar('__BBHANDLERS', bbhands)
269
270class InheritNode(AstNode):
271    def __init__(self, filename, lineno, classes):
272        AstNode.__init__(self, filename, lineno)
273        self.classes = classes
274
275    def eval(self, data):
276        bb.parse.BBHandler.inherit(self.classes, self.filename, self.lineno, data)
277
278def handleInclude(statements, filename, lineno, m, force):
279    statements.append(IncludeNode(filename, lineno, m.group(1), force))
280
281def handleExport(statements, filename, lineno, m):
282    statements.append(ExportNode(filename, lineno, m.group(1)))
283
284def handleUnset(statements, filename, lineno, m):
285    statements.append(UnsetNode(filename, lineno, m.group(1)))
286
287def handleUnsetFlag(statements, filename, lineno, m):
288    statements.append(UnsetFlagNode(filename, lineno, m.group(1), m.group(2)))
289
290def handleData(statements, filename, lineno, groupd):
291    statements.append(DataNode(filename, lineno, groupd))
292
293def handleMethod(statements, filename, lineno, func_name, body, python, fakeroot):
294    statements.append(MethodNode(filename, lineno, func_name, body, python, fakeroot))
295
296def handlePythonMethod(statements, filename, lineno, funcname, modulename, body):
297    statements.append(PythonMethodNode(filename, lineno, funcname, modulename, body))
298
299def handleExportFuncs(statements, filename, lineno, m, classname):
300    statements.append(ExportFuncsNode(filename, lineno, m.group(1), classname))
301
302def handleAddTask(statements, filename, lineno, m):
303    func = m.group("func")
304    before = m.group("before")
305    after = m.group("after")
306    if func is None:
307        return
308
309    statements.append(AddTaskNode(filename, lineno, func, before, after))
310
311def handleDelTask(statements, filename, lineno, m):
312    func = m.group("func")
313    if func is None:
314        return
315
316    statements.append(DelTaskNode(filename, lineno, func))
317
318def handleBBHandlers(statements, filename, lineno, m):
319    statements.append(BBHandlerNode(filename, lineno, m.group(1)))
320
321def handleInherit(statements, filename, lineno, m):
322    classes = m.group(1)
323    statements.append(InheritNode(filename, lineno, classes))
324
325def runAnonFuncs(d):
326    code = []
327    for funcname in d.getVar("__BBANONFUNCS", False) or []:
328        code.append("%s(d)" % funcname)
329    bb.utils.better_exec("\n".join(code), {"d": d})
330
331def finalize(fn, d, variant = None):
332    saved_handlers = bb.event.get_handlers().copy()
333    try:
334        for var in d.getVar('__BBHANDLERS', False) or []:
335            # try to add the handler
336            handlerfn = d.getVarFlag(var, "filename", False)
337            if not handlerfn:
338                bb.fatal("Undefined event handler function '%s'" % var)
339            handlerln = int(d.getVarFlag(var, "lineno", False))
340            bb.event.register(var, d.getVar(var, False), (d.getVarFlag(var, "eventmask") or "").split(), handlerfn, handlerln)
341
342        bb.event.fire(bb.event.RecipePreFinalise(fn), d)
343
344        bb.data.expandKeys(d)
345        runAnonFuncs(d)
346
347        tasklist = d.getVar('__BBTASKS', False) or []
348        bb.event.fire(bb.event.RecipeTaskPreProcess(fn, list(tasklist)), d)
349        bb.build.add_tasks(tasklist, d)
350
351        bb.parse.siggen.finalise(fn, d, variant)
352
353        d.setVar('BBINCLUDED', bb.parse.get_file_depends(d))
354
355        bb.event.fire(bb.event.RecipeParsed(fn), d)
356    finally:
357        bb.event.set_handlers(saved_handlers)
358
359def _create_variants(datastores, names, function, onlyfinalise):
360    def create_variant(name, orig_d, arg = None):
361        if onlyfinalise and name not in onlyfinalise:
362            return
363        new_d = bb.data.createCopy(orig_d)
364        function(arg or name, new_d)
365        datastores[name] = new_d
366
367    for variant in list(datastores.keys()):
368        for name in names:
369            if not variant:
370                # Based on main recipe
371                create_variant(name, datastores[""])
372            else:
373                create_variant("%s-%s" % (variant, name), datastores[variant], name)
374
375def multi_finalize(fn, d):
376    appends = (d.getVar("__BBAPPEND") or "").split()
377    for append in appends:
378        logger.debug(1, "Appending .bbappend file %s to %s", append, fn)
379        bb.parse.BBHandler.handle(append, d, True)
380
381    onlyfinalise = d.getVar("__ONLYFINALISE", False)
382
383    safe_d = d
384    d = bb.data.createCopy(safe_d)
385    try:
386        finalize(fn, d)
387    except bb.parse.SkipRecipe as e:
388        d.setVar("__SKIPPED", e.args[0])
389    datastores = {"": safe_d}
390
391    extended = d.getVar("BBCLASSEXTEND") or ""
392    if extended:
393        # the following is to support bbextends with arguments, for e.g. multilib
394        # an example is as follows:
395        #   BBCLASSEXTEND = "multilib:lib32"
396        # it will create foo-lib32, inheriting multilib.bbclass and set
397        # BBEXTENDCURR to "multilib" and BBEXTENDVARIANT to "lib32"
398        extendedmap = {}
399        variantmap = {}
400
401        for ext in extended.split():
402            eext = ext.split(':', 2)
403            if len(eext) > 1:
404                extendedmap[ext] = eext[0]
405                variantmap[ext] = eext[1]
406            else:
407                extendedmap[ext] = ext
408
409        pn = d.getVar("PN")
410        def extendfunc(name, d):
411            if name != extendedmap[name]:
412                d.setVar("BBEXTENDCURR", extendedmap[name])
413                d.setVar("BBEXTENDVARIANT", variantmap[name])
414            else:
415                d.setVar("PN", "%s-%s" % (pn, name))
416            bb.parse.BBHandler.inherit(extendedmap[name], fn, 0, d)
417
418        safe_d.setVar("BBCLASSEXTEND", extended)
419        _create_variants(datastores, extendedmap.keys(), extendfunc, onlyfinalise)
420
421    for variant in datastores.keys():
422        if variant:
423            try:
424                if not onlyfinalise or variant in onlyfinalise:
425                    finalize(fn, datastores[variant], variant)
426            except bb.parse.SkipRecipe as e:
427                datastores[variant].setVar("__SKIPPED", e.args[0])
428
429    datastores[""] = d
430    return datastores
431