support/scripts: add gen-manual-lists.py

Script generating the target and host package tables, and the deprecated
stuff list as well. These tables and lists are generated parsing the
Config.in files.

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
[yann.morin.1998@free.fr: no leading dot, no menu path for host-utils]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

support/scripts/gen-manual-lists.py

@@ -0,0 +1,379 @@
+#!/usr/bin/env python
+##
+## gen-manual-lists.py
+##
+## This script generates the following Buildroot manual appendices:
+##  - the package tables (one for the target, the other for host tools);
+##  - the deprecated items.
+##
+## Author(s):
+##  - Samuel Martin <s.martin49@gmail.com>
+##
+## Copyright (C) 2013 Samuel Martin
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##
+
+## Note about python2.
+##
+## This script can currently only be run using python2 interpreter due to
+## its kconfiglib dependency (which is not yet python3 friendly).
+
+from __future__ import print_function
+from __future__ import unicode_literals
+
+import os
+import re
+import sys
+import datetime
+from argparse import ArgumentParser
+
+try:
+    import kconfiglib
+except ImportError:
+    message = """
+Could not find the module 'kconfiglib' in the PYTHONPATH:
+"""
+    message += "\n".join(["  {0}".format(path) for path in sys.path])
+    message += """
+
+Make sure the Kconfiglib directory is in the PYTHONPATH, then relaunch the
+script.
+
+You can get kconfiglib from:
+  https://github.com/ulfalizer/Kconfiglib
+
+
+"""
+    sys.stderr.write(message)
+    raise
+
+
+def get_symbol_subset(root, filter_func):
+    """ Return a generator of kconfig items.
+
+    :param root_item:   Root item of the generated subset of items
+    :param filter_func: Filter function
+
+    """
+    if hasattr(root, "get_items"):
+        get_items = root.get_items
+    elif hasattr(root, "get_top_level_items"):
+        get_items = root.get_top_level_items
+    else:
+        message = "The symbol does not contain any subset of symbols"
+        raise Exception(message)
+    for item in get_items():
+        if item.is_symbol():
+            if not item.prompts:
+                continue
+            if not filter_func(item):
+                continue
+            yield item
+        elif item.is_menu() or item.is_choice():
+            for i in get_symbol_subset(item, filter_func):
+                yield i
+
+
+def get_symbol_parents(item, root=None, enable_choice=False):
+    """ Return the list of the item's parents. The lasst item of the list is
+    the closest parent, the first the furthest.
+
+    :param item:          Item from which the the parent list is generated
+    :param root:          Root item stopping the search (not included in the
+                          parent list)
+    :param enable_choice: Flag enabling choices to appear in the parent list
+
+    """
+    parent = item.get_parent()
+    parents = []
+    while parent and parent != root:
+        if parent.is_menu():
+            parents.append(parent.get_title())
+        elif enable_choice and parent.is_choice():
+            parents.append(parent.prompts[0][0])
+        parent = parent.get_parent()
+    if isinstance(root, kconfiglib.Menu) or \
+            (enable_choice and isinstance(root, kconfiglib.Choice)):
+        parents.append("") # Dummy empty parrent to get a leading arrow ->
+    parents.reverse()
+    return parents
+
+
+def format_asciidoc_table(root, get_label_func, filter_func=lambda x: True,
+                          enable_choice=False, sorted=True, sub_menu=True,
+                          item_label=None):
+    """ Return the asciidoc formatted table of the items and their location.
+
+    :param root:           Root item of the item subset
+    :param get_label_func: Item's label getter function
+    :param filter_func:    Filter function to apply on the item subset
+    :param enable_choice:  Enable choices to appear as part of the item's
+                           location
+    :param sorted:         Flag to alphabetically sort the table
+    :param sub_menu:       Output the column with the sub-menu path
+
+    """
+    def _format_entry(label, parents, sub_menu):
+        """ Format an asciidoc table entry.
+
+        """
+        if sub_menu:
+            return "| {0:<40} <| {1}\n".format(label, " -> ".join(parents))
+        else:
+            return "| {0:<40}\n".format(label)
+
+    lines = []
+    for item in get_symbol_subset(root, filter_func):
+        if not item.is_symbol() or not item.prompts:
+            continue
+        loc = get_symbol_parents(item, root, enable_choice=enable_choice)
+        lines.append(_format_entry(get_label_func(item), loc, sub_menu))
+    if sorted:
+        lines.sort(key=lambda x: x.lower())
+    if hasattr(root, "get_title"):
+        loc_label = get_symbol_parents(root, None, enable_choice=enable_choice)
+        loc_label += [root.get_title(), "..."]
+    else:
+        loc_label = ["Location"]
+    if not item_label:
+        item_label = "Items"
+    table = ":halign: center\n\n"
+    if sub_menu:
+        width = "100%"
+        columns = "^1,4"
+    else:
+        width = "30%"
+        columns = "^1"
+    table = "[width=\"{0}\",cols=\"{1}\",options=\"header\"]\n".format(width, columns)
+    table += "|===================================================\n"
+    table += _format_entry(item_label, loc_label, sub_menu)
+    table += "\n" + "".join(lines) + "\n"
+    table += "|===================================================\n"
+    return table
+
+
+class Buildroot:
+    """ Buildroot configuration object.
+
+    """
+    root_config = "Config.in"
+    package_dirname = "package"
+    package_prefixes = ["BR2_PACKAGE_", "BR2_PACKAGE_HOST_"]
+    re_pkg_prefix = re.compile(r"^(" + "|".join(package_prefixes) + ").*")
+    deprecated_symbol = "BR2_DEPRECATED"
+    list_in = """\
+//
+// Automatically generated list for Buildroot manual.
+//
+
+{table}
+"""
+
+    list_info = {
+        'target-packages': {
+            'filename': "package-list",
+            'root_menu': "Package Selection for the target",
+            'filter': "_is_package",
+            'sorted': True,
+            'sub_menu': True,
+        },
+        'host-packages': {
+            'filename': "host-package-list",
+            'root_menu': "Host utilities",
+            'filter': "_is_package",
+            'sorted': True,
+            'sub_menu': False,
+        },
+        'deprecated': {
+            'filename': "deprecated-list",
+            'root_menu': None,
+            'filter': "_is_deprecated",
+            'sorted': False,
+            'sub_menu': True,
+        },
+    }
+
+    def __init__(self):
+        self.base_dir = os.environ.get("TOPDIR")
+        self.output_dir = os.environ.get("O")
+        self.package_dir = os.path.join(self.base_dir, self.package_dirname)
+        # The kconfiglib requires an environment variable named "srctree" to
+        # load the configuration, so set it.
+        os.environ.update({'srctree': self.base_dir})
+        self.config = kconfiglib.Config(os.path.join(self.base_dir,
+                                                     self.root_config))
+        self._deprecated = self.config.get_symbol(self.deprecated_symbol)
+
+        self.gen_date = datetime.datetime.utcnow()
+        self.br_version_full = os.environ.get("BR2_VERSION_FULL")
+        if self.br_version_full and self.br_version_full.endswith("-git"):
+            self.br_version_full = self.br_version_full[:-4]
+        if not self.br_version_full:
+            self.br_version_full = "undefined"
+
+    def _get_package_symbols(self, package_name):
+        """ Return a tuple containing the target and host package symbol.
+
+        """
+        symbols = re.sub("[-+.]", "_", package_name)
+        symbols = symbols.upper()
+        symbols = tuple([prefix + symbols for prefix in self.package_prefixes])
+        return symbols
+
+    def _is_deprecated(self, symbol):
+        """ Return True if the symbol is marked as deprecated, otherwise False.
+
+        """
+        return self._deprecated in symbol.get_referenced_symbols()
+
+    def _is_package(self, symbol):
+        """ Return True if the symbol is a package or a host package, otherwise
+        False.
+
+        """
+        if not self.re_pkg_prefix.match(symbol.get_name()):
+            return False
+        pkg_name = re.sub("BR2_PACKAGE_(HOST_)?(.*)", r"\2", symbol.get_name())
+
+        pattern = "^(HOST_)?" + pkg_name + "$"
+        pattern = re.sub("_", ".", pattern)
+        pattern = re.compile(pattern, re.IGNORECASE)
+        # Here, we cannot just check for the location of the Config.in because
+        # of the "virtual" package.
+        #
+        # So, to check that a symbol is a package (not a package option or
+        # anything else), we check for the existence of the package *.mk file.
+        #
+        # By the way, to actually check for a package, we should grep all *.mk
+        # files for the following regex:
+        # "\$\(eval \$\((host-)?(generic|autotools|cmake)-package\)\)"
+        #
+        # Implementation details:
+        #
+        # * The package list is generated from the *.mk file existence, the
+        #   first time this function is called. Despite the memory consumtion,
+        #   this list is stored because the execution time of this script is
+        #   noticebly shorter than re-scannig the package sub-tree for each
+        #   symbol.
+        if not hasattr(self, "_package_list"):
+            pkg_list = []
+            for _, _, files in os.walk(self.package_dir):
+                for file_ in (f for f in files if f.endswith(".mk")):
+                    pkg_list.append(re.sub(r"(.*?)\.mk", r"\1", file_))
+            setattr(self, "_package_list", pkg_list)
+        for pkg in getattr(self, "_package_list"):
+            if pattern.match(pkg):
+                return True
+        return False
+
+    def _get_symbol_label(self, symbol, mark_deprecated=True):
+        """ Return the label (a.k.a. prompt text) of the symbol.
+
+        :param symbol:          The symbol
+        :param mark_deprecated: Append a 'deprecated' to the label
+
+        """
+        label = symbol.prompts[0][0]
+        if self._is_deprecated(symbol) and mark_deprecated:
+            label += " *(deprecated)*"
+        return label
+
+    def print_list(self, list_type, enable_choice=True, enable_deprecated=True,
+                   dry_run=False, output=None):
+        """ Print the requested list. If not dry run, then the list is
+        automatically written in its own file.
+
+        :param list_type:         The list type to be generated
+        :param enable_choice:     Flag enabling choices to appear in the list
+        :param enable_deprecated: Flag enabling deprecated items to appear in
+                                  the package lists
+        :param dry_run:           Dry run (print the list in stdout instead of
+                                  writing the list file
+
+        """
+        def _get_menu(title):
+            """ Return the first symbol menu matching the given title.
+
+            """
+            menus = self.config.get_menus()
+            menu = [m for m in menus if m.get_title().lower() == title.lower()]
+            if not menu:
+                message = "No such menu: '{0}'".format(title)
+                raise Exception(message)
+            return menu[0]
+
+        list_config = self.list_info[list_type]
+        root_title = list_config.get('root_menu')
+        if root_title:
+            root_item = _get_menu(root_title)
+        else:
+            root_item = self.config
+        filter_ = getattr(self, list_config.get('filter'))
+        filter_func = lambda x: filter_(x)
+        if not enable_deprecated and list_type != "deprecated":
+            filter_func = lambda x: filter_(x) and not self._is_deprecated(x)
+        mark_depr = list_type != "deprecated"
+        get_label = lambda x: self._get_symbol_label(x, mark_depr)
+        item_label = "Features" if list_type == "deprecated" else "Packages"
+
+        table = format_asciidoc_table(root_item, get_label,
+                                      filter_func=filter_func,
+                                      enable_choice=enable_choice,
+                                      sorted=list_config.get('sorted'),
+                                      sub_menu=list_config.get('sub_menu'),
+                                      item_label=item_label)
+
+        content = self.list_in.format(table=table)
+
+        if dry_run:
+            print(content)
+            return
+
+        if not output:
+            output_dir = self.output_dir
+            if not output_dir:
+                print("Warning: Undefined output directory.")
+                print("\tUse source directory as output location.")
+                output_dir = self.base_dir
+            output = os.path.join(output_dir,
+                                  list_config.get('filename') + ".txt")
+        if not os.path.exists(os.path.dirname(output)):
+            os.makedirs(os.path.dirname(output))
+        print("Writing the {0} list in:\n\t{1}".format(list_type, output))
+        with open(output, 'w') as fout:
+            fout.write(content)
+
+
+if __name__ == '__main__':
+    list_types = ['target-packages', 'host-packages', 'deprecated']
+    parser = ArgumentParser()
+    parser.add_argument("list_type", nargs="?", choices=list_types,
+                        help="""\
+Generate the given list (generate all lists if unspecified)""")
+    parser.add_argument("-n", "--dry-run", dest="dry_run", action='store_true',
+                        help="Output the generated list to stdout")
+    parser.add_argument("--output-target", dest="output_target",
+                        help="Output target package file")
+    parser.add_argument("--output-host", dest="output_host",
+                        help="Output host package file")
+    parser.add_argument("--output-deprecated", dest="output_deprecated",
+                        help="Output deprecated file")
+    args = parser.parse_args()
+    lists = [args.list_type] if args.list_type else list_types
+    buildroot = Buildroot()
+    for list_name in lists:
+        output = getattr(args, "output_" + list_name.split("-", 1)[0])
+        buildroot.print_list(list_name, dry_run=args.dry_run, output=output)