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The compilation database is a JSON file[1] storing all compilation flags. That is useful for tools using libclang for code completion and error reporting (for example: YouCompleteMe for vim). [1]: http://clang.llvm.org/docs/JSONCompilationDatabase.html
68 lines
2.3 KiB
Python
68 lines
2.3 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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# Christoph Koke, 2013
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# Original source: waflib/extras/clang_compilation_database.py from
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# waf git 15d14c7bdf2e (New BSD License)
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"""
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Writes the c and cpp compile commands into build/compile_commands.json
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see http://clang.llvm.org/docs/JSONCompilationDatabase.html
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Usage:
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def configure(conf):
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conf.load('compiler_cxx')
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...
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conf.load('clang_compilation_database')
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"""
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import sys, os, json, shlex, pipes
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from waflib import Logs, TaskGen
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from waflib.Tools import c, cxx
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if sys.hexversion >= 0x3030000:
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quote = shlex.quote
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else:
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quote = pipes.quote
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@TaskGen.feature('*')
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@TaskGen.after_method('process_use')
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def collect_compilation_db_tasks(self):
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"Add a compilation database entry for compiled tasks"
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try:
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clang_db = self.bld.clang_compilation_database_tasks
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except AttributeError:
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clang_db = self.bld.clang_compilation_database_tasks = []
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self.bld.add_post_fun(write_compilation_database)
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for task in getattr(self, 'compiled_tasks', []):
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if isinstance(task, (c.c, cxx.cxx)):
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clang_db.append(task)
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def write_compilation_database(ctx):
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"Write the clang compilation database as JSON"
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database_file = ctx.bldnode.make_node('compile_commands.json')
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Logs.info("Build commands will be stored in %s" % database_file.path_from(ctx.path))
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try:
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root = json.load(database_file)
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except IOError:
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root = []
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clang_db = dict((x["file"], x) for x in root)
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for task in getattr(ctx, 'clang_compilation_database_tasks', []):
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try:
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cmd = task.last_cmd
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except AttributeError:
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continue
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directory = getattr(task, 'cwd', ctx.variant_dir)
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f_node = task.inputs[0]
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filename = os.path.relpath(f_node.abspath(), directory)
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cmd = " ".join(map(quote, cmd))
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entry = {
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"directory": directory,
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"command": cmd,
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"file": filename,
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}
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clang_db[filename] = entry
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root = list(clang_db.values())
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database_file.write(json.dumps(root, indent=2))
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