2f604b2c8f
If a depends on b depends on c, then if when we consider building a, we have to check b and c. If we then are asked about a2 which depends on b, there is no reason to re-check b and its dependencies; we already know it's done. This takes the time to do 'redo t/curse/all' the *second* time down from 1.0s to 0.13s. (make can still do it in 0.07s.) 'redo t/curse/all' the first time is down from 5.4s to to 4.6s. With -j4, from 3.0s to 2.5s.
65 lines
1.6 KiB
Python
Executable file
65 lines
1.6 KiB
Python
Executable file
#!/usr/bin/python
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import sys, os, errno
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import vars, state, builder
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from helpers import debug, err, mkdirp, unlink
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def _dirty_deps(t, depth, fromdir):
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if state.ismarked(t, fromdir):
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return False # has already been checked during this session
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debug('%s?%s\n' % (depth, t))
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stamptime = state.stamped(t, fromdir)
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if stamptime == None:
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debug('%s-- DIRTY (no stamp)\n' % depth)
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return True
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try:
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realtime = os.stat(os.path.join(fromdir or '', t)).st_mtime
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except OSError:
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realtime = 0
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if stamptime != realtime:
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debug('%s-- DIRTY (mtime)\n' % depth)
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return True
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for mode,name in state.deps(t, fromdir):
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if mode == 'c':
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if os.path.exists(name):
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debug('%s-- DIRTY (created)\n' % depth)
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return True
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elif mode == 'm':
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if dirty_deps(name, depth + ' ', fromdir=vars.BASE):
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#debug('%s-- DIRTY (sub)\n' % depth)
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return True
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state.mark(t, fromdir)
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return False
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def dirty_deps(t, depth, fromdir=None):
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if _dirty_deps(t, depth, fromdir):
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state.unstamp(t, fromdir)
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return True
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return False
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def maybe_build(t):
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if dirty_deps(t, depth = ''):
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builder.build(t)
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if not vars.TARGET:
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err('redo-ifchange: error: must be run from inside a .do\n')
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sys.exit(100)
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rv = 202
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try:
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want_build = []
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for t in sys.argv[1:]:
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state.add_dep(vars.TARGET, 'm', t)
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if dirty_deps(t, depth = ''):
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want_build.append(t)
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rv = builder.main(want_build, maybe_build)
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except KeyboardInterrupt:
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sys.exit(200)
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sys.exit(rv)
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