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-rw-r--r--Tools/d_scan.py211
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diff --git a/Tools/d_scan.py b/Tools/d_scan.py
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-#!/usr/bin/env python
-# encoding: utf-8
-# Thomas Nagy, 2016-2018 (ita)
-
-"""
-Provide a scanner for finding dependencies on d files
-"""
-
-import re
-from waflib import Utils
-
-def filter_comments(filename):
- """
- :param filename: d file name
- :type filename: string
- :rtype: list
- :return: a list of characters
- """
- txt = Utils.readf(filename)
- i = 0
- buf = []
- max = len(txt)
- begin = 0
- while i < max:
- c = txt[i]
- if c == '"' or c == "'": # skip a string or character literal
- buf.append(txt[begin:i])
- delim = c
- i += 1
- while i < max:
- c = txt[i]
- if c == delim:
- break
- elif c == '\\': # skip the character following backslash
- i += 1
- i += 1
- i += 1
- begin = i
- elif c == '/': # try to replace a comment with whitespace
- buf.append(txt[begin:i])
- i += 1
- if i == max:
- break
- c = txt[i]
- if c == '+': # eat nesting /+ +/ comment
- i += 1
- nesting = 1
- c = None
- while i < max:
- prev = c
- c = txt[i]
- if prev == '/' and c == '+':
- nesting += 1
- c = None
- elif prev == '+' and c == '/':
- nesting -= 1
- if nesting == 0:
- break
- c = None
- i += 1
- elif c == '*': # eat /* */ comment
- i += 1
- c = None
- while i < max:
- prev = c
- c = txt[i]
- if prev == '*' and c == '/':
- break
- i += 1
- elif c == '/': # eat // comment
- i += 1
- while i < max and txt[i] != '\n':
- i += 1
- else: # no comment
- begin = i - 1
- continue
- i += 1
- begin = i
- buf.append(' ')
- else:
- i += 1
- buf.append(txt[begin:])
- return buf
-
-class d_parser(object):
- """
- Parser for d files
- """
- def __init__(self, env, incpaths):
- #self.code = ''
- #self.module = ''
- #self.imports = []
-
- self.allnames = []
-
- self.re_module = re.compile(r"module\s+([^;]+)")
- self.re_import = re.compile(r"import\s+([^;]+)")
- self.re_import_bindings = re.compile("([^:]+):(.*)")
- self.re_import_alias = re.compile("[^=]+=(.+)")
-
- self.env = env
-
- self.nodes = []
- self.names = []
-
- self.incpaths = incpaths
-
- def tryfind(self, filename):
- """
- Search file a file matching an module/import directive
-
- :param filename: file to read
- :type filename: string
- """
- found = 0
- for n in self.incpaths:
- found = n.find_resource(filename.replace('.', '/') + '.d')
- if found:
- self.nodes.append(found)
- self.waiting.append(found)
- break
- if not found:
- if not filename in self.names:
- self.names.append(filename)
-
- def get_strings(self, code):
- """
- :param code: d code to parse
- :type code: string
- :return: the modules that the code uses
- :rtype: a list of match objects
- """
- #self.imports = []
- self.module = ''
- lst = []
-
- # get the module name (if present)
-
- mod_name = self.re_module.search(code)
- if mod_name:
- self.module = re.sub(r'\s+', '', mod_name.group(1)) # strip all whitespaces
-
- # go through the code, have a look at all import occurrences
-
- # first, lets look at anything beginning with "import" and ending with ";"
- import_iterator = self.re_import.finditer(code)
- if import_iterator:
- for import_match in import_iterator:
- import_match_str = re.sub(r'\s+', '', import_match.group(1)) # strip all whitespaces
-
- # does this end with an import bindings declaration?
- # (import bindings always terminate the list of imports)
- bindings_match = self.re_import_bindings.match(import_match_str)
- if bindings_match:
- import_match_str = bindings_match.group(1)
- # if so, extract the part before the ":" (since the module declaration(s) is/are located there)
-
- # split the matching string into a bunch of strings, separated by a comma
- matches = import_match_str.split(',')
-
- for match in matches:
- alias_match = self.re_import_alias.match(match)
- if alias_match:
- # is this an alias declaration? (alias = module name) if so, extract the module name
- match = alias_match.group(1)
-
- lst.append(match)
- return lst
-
- def start(self, node):
- """
- The parsing starts here
-
- :param node: input file
- :type node: :py:class:`waflib.Node.Node`
- """
- self.waiting = [node]
- # while the stack is not empty, add the dependencies
- while self.waiting:
- nd = self.waiting.pop(0)
- self.iter(nd)
-
- def iter(self, node):
- """
- Find all the modules that a file depends on, uses :py:meth:`waflib.Tools.d_scan.d_parser.tryfind` to process dependent files
-
- :param node: input file
- :type node: :py:class:`waflib.Node.Node`
- """
- path = node.abspath() # obtain the absolute path
- code = "".join(filter_comments(path)) # read the file and filter the comments
- names = self.get_strings(code) # obtain the import strings
- for x in names:
- # optimization
- if x in self.allnames:
- continue
- self.allnames.append(x)
-
- # for each name, see if it is like a node or not
- self.tryfind(x)
-
-def scan(self):
- "look for .d/.di used by a d file"
- env = self.env
- gruik = d_parser(env, self.generator.includes_nodes)
- node = self.inputs[0]
- gruik.start(node)
- nodes = gruik.nodes
- names = gruik.names
- return (nodes, names)
-