watch files and run a command when they change
wr -- watch files and run a command when they change
wr [-cvV] command [file ...]
wr will watch the set of files and directories specified on the
command line, and run the specified command when any of the files
changes. For each file operand which is a directory, all the files
in the directory (recursively) will be watched.
If no files are specified, it's as if you passed "." as the file parameter.
The following options are available:
-c minutes --chime=minutes
Write a diagnostic message after
minuteshave elapsed since last running a command, to remind you
Generate additional diagnostic information.
Display the version number and exit.
The following is how to run make when any file in the current directory changes:
More likely you can whittle the list of source files checked a bit. The
following will run make any file in the
wr make src doc test
To run a command with arguments, quote the command you want to run. The
following will run the command "
echo a file changed" when any file in the
current directory changes:
wr "echo a file changed"
wr will not normally exit. Use ctrl-c or equivalent to kill the process from the command-line.
If the current directory has a
.wr file in it, that file is assumed
to have the contents of a
wr invocation in it, one argument per line.
The file may contain blank lines or lines starting with the
which are considered comments.
The stdout and stderr from the command being run are passed directory to
wr's stdout and stderr. stdin for the command will not be available
for the command.
Diagnostic information from
wr will be written to stderr.
wr is a port of Patrick Mueller's run-when-changed.py
script to node.