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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768#!/usr/bin/env python# encoding: utf-8# Christoph Koke, 2013# Original source: waflib/extras/clang_compilation_database.py from# waf git 15d14c7bdf2e (New BSD License)
"""Writes the c and cpp compile commands into build/compile_commands.jsonsee http://clang.llvm.org/docs/JSONCompilationDatabase.html
Usage:
def configure(conf): conf.load('compiler_cxx') ... conf.load('clang_compilation_database')"""
import sys, os, json, shlex, pipesfrom waflib import Logs, TaskGenfrom waflib.Tools import c, cxx
if sys.hexversion >= 0x3030000: quote = shlex.quoteelse: quote = pipes.quote
@TaskGen.feature('*')@TaskGen.after_method('process_use')def collect_compilation_db_tasks(self): "Add a compilation database entry for compiled tasks" try: clang_db = self.bld.clang_compilation_database_tasks except AttributeError: clang_db = self.bld.clang_compilation_database_tasks = [] self.bld.add_post_fun(write_compilation_database)
for task in getattr(self, 'compiled_tasks', []): if isinstance(task, (c.c, cxx.cxx)): clang_db.append(task)
def write_compilation_database(ctx): "Write the clang compilation database as JSON" database_file = ctx.bldnode.make_node('compile_commands.json') Logs.info("Build commands will be stored in %s" % database_file.path_from(ctx.path)) try: root = json.load(database_file) except IOError: root = [] clang_db = dict((x["file"], x) for x in root) for task in getattr(ctx, 'clang_compilation_database_tasks', []): try: cmd = task.last_cmd except AttributeError: continue directory = getattr(task, 'cwd', ctx.variant_dir) f_node = task.inputs[0] filename = os.path.relpath(f_node.abspath(), directory) cmd = " ".join(map(quote, cmd)) entry = { "directory": directory, "command": cmd, "file": filename, } clang_db[filename] = entry root = list(clang_db.values()) database_file.write(json.dumps(root, indent=2))