Issue 50 in fabricate: Watch to auto-build

[fabr...@googlecode.com]

Status: New
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 50 by wer...@beroux.com: Watch to auto-build
http://code.google.com/p/fabricate/issues/detail?id=50

It would be great to have WAF automatically execute the steps required when
files change.

This may allow something like SASS --watch which saves a lot of time.

The watch should allow to specify a target target so that only that is
built automatically.

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[fabr...@googlecode.com]

Comment #1 on issue 50 by wer...@beroux.com: Watch to auto-build
http://code.google.com/p/fabricate/issues/detail?id=50

[Watchdog](https://github.com/gorakhargosh/watchdog) seems to help a lot on
that.

Here is a script which does that so it should be easy to incorporate it in
fabricate:

import sys
import time
from watchdog.observers import Observer
from watchdog.tricks import ShellCommandTrick

if __name__ == __main__:
event_handler = ShellCommandTrick(shell_command='python build.py',
wait_for_process=True)
observer = Observer()
observer.schedule(event_handler, '.', recursive=True)
observer.start()
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
observer.stop()
observer.join()

It has a possible issue, when you touch a file it'll be recorded as a
CREATE followed right after by a MODIFY event. There should probably be a
buffer of a few milliseconds. Possibly the files could be filtered to
include only some of them but that's more optional for now.

[Lex Trotman]

It doesn't need to be in fabricate, you can use this in your build script to trigger fabricate

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