xargs that makes sense
bux is a small terminal program that can digest text based input and execute
other CL programs based on a regular expression ruleset.
bus is built using the Haxe compiler and require hxcpp to compile. The
hxcpp library can be installed using the haxelib program like so:
$ haxelib install hxcpp
To build bux you simply execute the following line in the project directory.
This will create a bux.cpp folder with the C++ output and a bin folder where
you will find the finished bux executable binary.
$ haxe build.hxml
bux takes 2 arguments; regular expression (rules) and command like so:
$ bux [flags] <regular expression> <command>
The regular expression and command should be wrapped within quotes to avoid misinterpretation.
The command may hold replace placeholders in the form of {#}. Where the #
represents the regular expression group to be used. Currently bux allows for
0 to 9 groups where 0 is the complete match.
The following example reads a text-file and echos a parsed result.
File: capitals.txt
Sweden, Stockholm
Spain, Madrid
France, Paris
Command:
$ cat capitals.txt | bux -l "/(\w+),\s?([\w\s]+)/i" "echo {2} is the capital of {1}"
Output:
Stockholm is the capital of Sweden
Madrid is the capital of Spain
Paris is the capital of France
-d or --dry-run
It is often tricky to get your regular expression right the first time,
therefore bux will output the constructed commands to STDOUT instead if you
specify a dry run.
-l or --lines
Keeping lists of custom arguments can be very handy. bux allows you to execute
and merge the command for each line in STDIN individually (see Example).
-f or --follow
This option will keep bux running even if STDIN is empty and execute the
regular expression test and user defined command for each line STDIN receives.
This is useful if you are listening to network sockets or reading continously
appended files such as log-files.
Note: This will read complete lines (ending with system EOL) regardless if
--lines is specified or not.
bux is licensed under MIT
Carl Calderon: @carlcalderon