Exec

Thin Process wrapper for simple execution of programs with arguments

Installation

Add the dependency to your shard.yml:

dependencies:
  exec:
    github: j8r/exec.cr

Usage

Methods

#out(strict = false) : String: Return the output (stdout) of the process as a String if exited normally with an exit code of 0, else return the error (stderr) or raise the error when strict = true

#output : String: Return the stdout

#error : String: Return the stderr

Other methods are available, forwarded from Process::Status

Examples

Exec.new("/bin/true").success? # true

Most efficient syntax

Exec.new("/bin/true", nil).success? # true
Exec.new("/bin/ls", ["/tmp", "-l"]).exit_status # 0

Shell-like syntax. No shell interpreter sub-process is invocated.

Exec.new("ls /tmp -l").exit_status # 0

Other syntaxes are also supported

Exec.new("/bin/ls /tmp -l")
Exec.new("/bin/ls", "/tmp -l")
Exec.new("ls", "/tmp -l")

Exec.new("/bin/pwd", args: nil, dir: "/tmp").out # "/tmp\n"

License

Copyright (c) 2017 - 2018 Julien Reichardt - ISC License