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129 lines
4.1 KiB
Python
129 lines
4.1 KiB
Python
"""Bring time stamps of generated checked-in files into the right order
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A versioned configuration file .hgtouch specifies generated files, in the
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syntax of make rules.
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output: input1 input2
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In addition to the dependency syntax, #-comments are supported.
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"""
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import errno
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import os
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import time
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def parse_config(repo):
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try:
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fp = repo.wfile(".hgtouch")
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except IOError, e:
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if e.errno != errno.ENOENT:
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raise
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return {}
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result = {}
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with fp:
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for line in fp:
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# strip comments
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line = line.split('#')[0].strip()
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if ':' not in line:
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continue
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outputs, inputs = line.split(':', 1)
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outputs = outputs.split()
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inputs = inputs.split()
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for o in outputs:
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try:
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result[o].extend(inputs)
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except KeyError:
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result[o] = inputs
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return result
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def check_rule(ui, repo, modified, basedir, output, inputs):
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"""Verify that the output is newer than any of the inputs.
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Return (status, stamp), where status is True if the update succeeded,
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and stamp is the newest time stamp assigned to any file (might be in
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the future).
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If basedir is nonempty, it gives a directory in which the tree is to
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be checked.
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"""
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f_output = repo.wjoin(os.path.join(basedir, output))
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try:
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o_time = os.stat(f_output).st_mtime
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except OSError:
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ui.warn("Generated file %s does not exist\n" % output)
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return False, 0
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youngest = 0 # youngest dependency
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backdate = None
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backdate_source = None
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for i in inputs:
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f_i = repo.wjoin(os.path.join(basedir, i))
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try:
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i_time = os.stat(f_i).st_mtime
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except OSError:
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ui.warn(".hgtouch input file %s does not exist\n" % i)
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return False, 0
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if i in modified:
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# input is modified. Need to backdate at least to i_time
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if backdate is None or backdate > i_time:
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backdate = i_time
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backdate_source = i
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continue
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youngest = max(i_time, youngest)
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if backdate is not None:
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ui.warn("Input %s for file %s locally modified\n" % (backdate_source, output))
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# set to 1s before oldest modified input
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backdate -= 1
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os.utime(f_output, (backdate, backdate))
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return False, 0
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if youngest >= o_time:
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ui.note("Touching %s\n" % output)
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youngest += 1
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os.utime(f_output, (youngest, youngest))
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return True, youngest
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else:
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# Nothing to update
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return True, 0
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def do_touch(ui, repo, basedir):
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if basedir:
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if not os.path.isdir(repo.wjoin(basedir)):
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ui.warn("Abort: basedir %r does not exist\n" % basedir)
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return
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modified = []
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else:
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modified = repo.status()[0]
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dependencies = parse_config(repo)
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success = True
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tstamp = 0 # newest time stamp assigned
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# try processing all rules in topological order
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hold_back = {}
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while dependencies:
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output, inputs = dependencies.popitem()
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# check whether any of the inputs is generated
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for i in inputs:
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if i in dependencies:
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hold_back[output] = inputs
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continue
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_success, _tstamp = check_rule(ui, repo, modified, basedir, output, inputs)
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success = success and _success
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tstamp = max(tstamp, _tstamp)
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# put back held back rules
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dependencies.update(hold_back)
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hold_back = {}
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now = time.time()
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if tstamp > now:
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# wait until real time has passed the newest time stamp, to
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# avoid having files dated in the future
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time.sleep(tstamp-now)
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if hold_back:
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ui.warn("Cyclic dependency involving %s\n" % (' '.join(hold_back.keys())))
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return False
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return success
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def touch(ui, repo, basedir):
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"touch generated files that are older than their sources after an update."
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do_touch(ui, repo, basedir)
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cmdtable = {
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"touch": (touch,
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[('b', 'basedir', '', 'base dir of the tree to apply touching')],
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"hg touch [-b BASEDIR]")
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}
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