fpipe

Filter (and map) in a shell pipe.

What and Why

For the times you need to filter (or map) in a shell pipe.

Filtering (default):

• reads input lines
• runs command for each line
• prints line if command was successful

Mapping (with --map):

• reads input lines
• runs command for each line
• if command was successful, output its stdout instead of the line

Examples

Only list files that contain cats:

ls | fpipe grep -sqi cats {}

Only keep files that do not contain cats:

ls | fpipe -n grep -sqi cats {} # short for --negate

Search for files that contain a list of patterns in the name:

cat patterns | fpipe -m fd {} # short for --map

Command syntax

If {} is not present in the command arguments, the line is passed to the subprocess via stdin.

If {} is given, it gets replaced by each line in turn before execution.

Installation

cargo install fpipe

Flags and features

fpipe 0.1.0

Filter (and map) in a shell pipe
'{}' arguments to the command are replaced with input line before execution

USAGE:
    fpipe [FLAGS] [cmd-and-args]...

FLAGS:
    -h, --help       Prints help information
    -m, --map        perform mapping (only command output is emitted, only if successful)
    -n, --negate     negate the command exit status
    -q, --quiet      suppress stdout of subcommand (stderr is still propagated)
    -V, --version    Prints version information

ARGS:
    <cmd-and-args>...    command to execute and its arguments

TODO

• more features
• parallelism