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Help: Clarify how to run sequential commands in execute_process

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The execute_process command starts all commands in parallel (in order
for the piping to work). Mention this explicitly and also add a note
about how to execute commands sequentially.
This commit is contained in:
Christian Fetzer 2016-11-01 10:19:00 +01:00
parent b9fcd348a7
commit 77e78af1a2
1 changed files with 4 additions and 1 deletions
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Help/command/execute_process.rst
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@ -20,7 +20,7 @@ Execute one or more child processes.
[OUTPUT_STRIP_TRAILING_WHITESPACE] [OUTPUT_STRIP_TRAILING_WHITESPACE]
[ERROR_STRIP_TRAILING_WHITESPACE]) [ERROR_STRIP_TRAILING_WHITESPACE])
Runs the given sequence of one or more commands with the standard Runs the given sequence of one or more commands in parallel with the standard
output of each process piped to the standard input of the next. output of each process piped to the standard input of the next.
A single standard error pipe is used for all processes. A single standard error pipe is used for all processes.
@ -36,6 +36,9 @@ Options:
(Use the ``INPUT_*``, ``OUTPUT_*``, and ``ERROR_*`` options to (Use the ``INPUT_*``, ``OUTPUT_*``, and ``ERROR_*`` options to
redirect stdin, stdout, and stderr.) redirect stdin, stdout, and stderr.)
If a sequential execution of multiple commands is required, use multiple
:command:`execute_process` calls with a single ``COMMAND`` argument.
``WORKING_DIRECTORY`` ``WORKING_DIRECTORY``
The named directory will be set as the current working directory of The named directory will be set as the current working directory of
the child processes. the child processes.