cmd_parallel: Execute a list of commands

In blit: Bioinformatics Library for Integrated Tools

Execute a list of commands

Description

Execute a list of commands

Usage

cmd_parallel(
  ...,
  stdouts = FALSE,
  stderrs = FALSE,
  stdins = NULL,
  stdout_callbacks = NULL,
  stderr_callbacks = NULL,
  timeouts = NULL,
  threads = NULL,
  verbose = TRUE
)

Arguments

...	A list of command object.
stdouts, stderrs	Specifies how the output/error streams of the child process are handled. One of or a list of following values: FALSE/NULL: Suppresses the output/error stream. TRUE: Prints the child process output/error to the R console. If a standard output/error stream exists, "" is used; otherwise, "|" is used. string: An empty string "" inherits the standard output/error stream from the main R process (Printing in the R console). If the main R process lacks a standard output/error stream, such as in RGui on Windows, an error is thrown. A string "|" prints to the standard output connection of R process (Using cat()). Alternative, a file name or path to redirect the output/error. If a relative path is specified, it remains relative to the current working directory, even if a different directory is set using cmd_wd(). connection: A writable R connection object. If the connection is not open(), it will be automatically opened. For stderrs, use string "2>&1" to redirect it to the same connection (i.e. pipe or file) as stdout. When a single file path is specified, the stdout/stderr of all commands will be merged into this single file.
stdins	should the input be diverted? One of or a list of following values: FALSE/NULL: no standard input. TRUE: If a standard input stream exists, "" is used; otherwise, NULL is used. string: An empty string "" inherits the standard input stream from the main R process. If the main R process lacks a standard input stream, such as in RGui on Windows, an error is thrown. Alternative, a file name or path to redirect the input. If a relative path is specified, it remains relative to the current working directory, even if a different directory is set using cmd_wd().
stdout_callbacks, stderr_callbacks	One of or a list of following values: NULL: no callback function. function: A function invoked for each line of standard output or error. Non-text (non-character) output will be ignored. The function should accept two arguments: one for the standard output or error and another for the running process object.
timeouts	Timeout in seconds. Can be a single value or a list, specifying the maximum elapsed time for running the command in the separate process.
threads	Number of threads to use.
verbose	A single boolean value indicating whether the command execution should be verbose.

Value

A list of exit status invisiblely.

See Also

• cmd_wd()/cmd_envvar()/cmd_envpath()/cmd_conda()

• cmd_on_start()/cmd_on_exit()

• cmd_on_succeed()/cmd_on_fail()

• cmd_parallel()

blit documentation built on April 12, 2025, 1:16 a.m.