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 stdin as lines
• runs command for each line
• prints line if command was successful

Mapping (with --map):

• reads stdin as 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 present, it gets replaced by each input line before execution.

Installation

cargo install fpipe

Flags and features

fpipe 0.1.2

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

USAGE:
    fpipe [OPTIONS] [CMD_AND_ARGS]...

ARGS:
    <CMD_AND_ARGS>...    Command to execute and its arguments

OPTIONS:
    -h, --help       Print 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 command (stderr is still propagated)
    -V, --version    Print version information

TODO

• more features
• parallelism