Run GNU parallel commands in different folders

Question

I'm trying to run commands in parallel. But these commands need to be run in different directories. How can I achieve this? Can I do something like this:

parallel ::: 'cd platform1 && npm install && npm run build-all'
'cd platform2 && npm install && npm run build-prod'

Kondybas · Accepted Answer · 2017-11-20T20:23:42.053

0

#!/bin/sh
(cd platform1 && npm install && npm run build-all && touch flag.1) &
(cd platform2 && npm install && npm run build-prod && touch flag.2) &

while [ !( -f flag.1 -a -f flag.2 ) ]
do sleep 5
done

# All the rest code

####

Commands placed inside round brackets (or backticks) are launched inside subshell that is launched in background because of trailing &

edited Nov 20 '17 at 20:23

answered Nov 20 '17 at 19:33

Kondybas

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so would I write it like this? parallel ::: ('cd platform1 && npm install && npm run build-all')& ('cd platform2 && npm install && npm run build-prod')& – masterforker Nov 20 '17 at 19:35
Commands should be separated by semicolon if you want one-liner: `parallel ::: (pipe1)& ; (pipe2)&;` – Kondybas Nov 20 '17 at 19:48
is that best practice or does the semicolon have a purpose? – masterforker Nov 20 '17 at 19:58
and sorry last question. If i want to write some commands after these commands that need to wait for these to finish, how do I do that? – masterforker Nov 20 '17 at 20:04
Semicolon separate commands. It is mandatory if you place more than one command in the line. I've edit my answer. – Kondybas Nov 20 '17 at 20:19
the while loop is giving me a syntax error near unexpected token `(' – masterforker Nov 20 '17 at 20:53
Refer to the `man [` on your platform. – Kondybas Nov 20 '17 at 21:05

Run GNU parallel commands in different folders

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