aboutsummaryrefslogtreecommitdiffstats
path: root/waflib/extras/stracedeps.py
diff options
context:
space:
mode:
Diffstat (limited to 'waflib/extras/stracedeps.py')
m---------waflib0
-rw-r--r--waflib/extras/stracedeps.py174
2 files changed, 0 insertions, 174 deletions
diff --git a/waflib b/waflib
new file mode 160000
+Subproject 2314e236ca6e7d94a26c3c17091da0f25f5867f
diff --git a/waflib/extras/stracedeps.py b/waflib/extras/stracedeps.py
deleted file mode 100644
index 37d82cb..0000000
--- a/waflib/extras/stracedeps.py
+++ /dev/null
@@ -1,174 +0,0 @@
-#!/usr/bin/env python
-# encoding: utf-8
-# Thomas Nagy, 2015 (ita)
-
-"""
-Execute tasks through strace to obtain dependencies after the process is run. This
-scheme is similar to that of the Fabricate script.
-
-To use::
-
- def configure(conf):
- conf.load('strace')
-
-WARNING:
-* This will not work when advanced scanners are needed (qt4/qt5)
-* The overhead of running 'strace' is significant (56s -> 1m29s)
-* It will not work on Windows :-)
-"""
-
-import os, re, threading
-from waflib import Task, Logs, Utils
-
-#TRACECALLS = 'trace=access,chdir,clone,creat,execve,exit_group,fork,lstat,lstat64,mkdir,open,rename,stat,stat64,symlink,vfork'
-TRACECALLS = 'trace=process,file'
-
-BANNED = ('/tmp', '/proc', '/sys', '/dev')
-
-s_process = r'(?:clone|fork|vfork)\(.*?(?P<npid>\d+)'
-s_file = r'(?P<call>\w+)\("(?P<path>([^"\\]|\\.)*)"(.*)'
-re_lines = re.compile(r'^(?P<pid>\d+)\s+(?:(?:%s)|(?:%s))\r*$' % (s_file, s_process), re.IGNORECASE | re.MULTILINE)
-strace_lock = threading.Lock()
-
-def configure(conf):
- conf.find_program('strace')
-
-def task_method(func):
- # Decorator function to bind/replace methods on the base Task class
- #
- # The methods Task.exec_command and Task.sig_implicit_deps already exists and are rarely overridden
- # we thus expect that we are the only ones doing this
- try:
- setattr(Task.Task, 'nostrace_%s' % func.__name__, getattr(Task.Task, func.__name__))
- except AttributeError:
- pass
- setattr(Task.Task, func.__name__, func)
- return func
-
-@task_method
-def get_strace_file(self):
- try:
- return self.strace_file
- except AttributeError:
- pass
-
- if self.outputs:
- ret = self.outputs[0].abspath() + '.strace'
- else:
- ret = '%s%s%d%s' % (self.generator.bld.bldnode.abspath(), os.sep, id(self), '.strace')
- self.strace_file = ret
- return ret
-
-@task_method
-def get_strace_args(self):
- return (self.env.STRACE or ['strace']) + ['-e', TRACECALLS, '-f', '-o', self.get_strace_file()]
-
-@task_method
-def exec_command(self, cmd, **kw):
- bld = self.generator.bld
- if not 'cwd' in kw:
- kw['cwd'] = self.get_cwd()
-
- args = self.get_strace_args()
- fname = self.get_strace_file()
- if isinstance(cmd, list):
- cmd = args + cmd
- else:
- cmd = '%s %s' % (' '.join(args), cmd)
-
- try:
- ret = bld.exec_command(cmd, **kw)
- finally:
- if not ret:
- self.parse_strace_deps(fname, kw['cwd'])
- return ret
-
-@task_method
-def sig_implicit_deps(self):
- # bypass the scanner functions
- return
-
-@task_method
-def parse_strace_deps(self, path, cwd):
- # uncomment the following line to disable the dependencies and force a file scan
- # return
- try:
- cnt = Utils.readf(path)
- finally:
- try:
- os.remove(path)
- except OSError:
- pass
-
- if not isinstance(cwd, str):
- cwd = cwd.abspath()
-
- nodes = []
- bld = self.generator.bld
- try:
- cache = bld.strace_cache
- except AttributeError:
- cache = bld.strace_cache = {}
-
- # chdir and relative paths
- pid_to_cwd = {}
-
- global BANNED
- done = set()
- for m in re.finditer(re_lines, cnt):
- # scraping the output of strace
- pid = m.group('pid')
- if m.group('npid'):
- npid = m.group('npid')
- pid_to_cwd[npid] = pid_to_cwd.get(pid, cwd)
- continue
-
- p = m.group('path').replace('\\"', '"')
-
- if p == '.' or m.group().find('= -1 ENOENT') > -1:
- # just to speed it up a bit
- continue
-
- if not os.path.isabs(p):
- p = os.path.join(pid_to_cwd.get(pid, cwd), p)
-
- call = m.group('call')
- if call == 'chdir':
- pid_to_cwd[pid] = p
- continue
-
- if p in done:
- continue
- done.add(p)
-
- for x in BANNED:
- if p.startswith(x):
- break
- else:
- if p.endswith('/') or os.path.isdir(p):
- continue
-
- try:
- node = cache[p]
- except KeyError:
- strace_lock.acquire()
- try:
- cache[p] = node = bld.root.find_node(p)
- if not node:
- continue
- finally:
- strace_lock.release()
- nodes.append(node)
-
- # record the dependencies then force the task signature recalculation for next time
- if Logs.verbose:
- Logs.debug('deps: real scanner for %r returned %r', self, nodes)
- bld = self.generator.bld
- bld.node_deps[self.uid()] = nodes
- bld.raw_deps[self.uid()] = []
- try:
- del self.cache_sig
- except AttributeError:
- pass
- self.signature()
-