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-rw-r--r--pugl/waflib/extras/clang_compilation_database.py85
1 files changed, 85 insertions, 0 deletions
diff --git a/pugl/waflib/extras/clang_compilation_database.py b/pugl/waflib/extras/clang_compilation_database.py
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+++ b/pugl/waflib/extras/clang_compilation_database.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# Christoph Koke, 2013
+
+"""
+Writes the c and cpp compile commands into build/compile_commands.json
+see 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, pipes
+from waflib import Logs, TaskGen, Task
+
+Task.Task.keep_last_cmd = True
+
+@TaskGen.feature('c', 'cxx')
+@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)
+
+ tup = tuple(y for y in [Task.classes.get(x) for x in ('c', 'cxx')] if y)
+ for task in getattr(self, 'compiled_tasks', []):
+ if isinstance(task, tup):
+ 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)
+ entry = {
+ "directory": directory,
+ "arguments": cmd,
+ "file": filename,
+ }
+ clang_db[filename] = entry
+ root = list(clang_db.values())
+ database_file.write(json.dumps(root, indent=2))
+
+# Override the runnable_status function to do a dummy/dry run when the file doesn't need to be compiled.
+# This will make sure compile_commands.json is always fully up to date.
+# Previously you could end up with a partial compile_commands.json if the build failed.
+for x in ('c', 'cxx'):
+ if x not in Task.classes:
+ continue
+
+ t = Task.classes[x]
+
+ def runnable_status(self):
+ def exec_command(cmd, **kw):
+ pass
+
+ run_status = self.old_runnable_status()
+ if run_status == Task.SKIP_ME:
+ setattr(self, 'old_exec_command', getattr(self, 'exec_command', None))
+ setattr(self, 'exec_command', exec_command)
+ self.run()
+ setattr(self, 'exec_command', getattr(self, 'old_exec_command', None))
+ return run_status
+
+ setattr(t, 'old_runnable_status', getattr(t, 'runnable_status', None))
+ setattr(t, 'runnable_status', runnable_status)