Bash Script/Function

Question

I'm trying to set up a bash function so that I can type a few parameters and create a git pull request:

gpreq "<title>" "<ticketnumber>" "<release>" "<briefdescription>"

I've tried both of these functions to no avail:

gpreq () {
    hub pull-request -m "$1\n\n Ticket: https://ticketsystem.net/issues/$2\n Target Release: $3\n Description: $4" ; }

and also

gpreq() {
    STR="${1}"$'\n\n Ticket: https://ticketsystem.net/issues/'$"${2}"$'\n Target Release: '$"${3}"$'\n Description: '$"${4}"
    hub pull-request -m "${STR}" ;
}

For some reason the line breaks don't seem to be working, instead the \n is coming through as actual characters. Any help would be appreciated!

What version is your bash (bash --version)? I have bash 4.3 and it handles the ANSI-C quoting perfectly. — glenn jackman
– glenn jackman, Commented Jun 6, 2018 at 18:44
Hmm, ANSI-C quoting was added to bash in verion 2.0 -- surely your bash version is more recent than that. (git.savannah.gnu.org/cgit/bash.git/tree/NEWS?h=bash-4.4#n1754) — glenn jackman
– glenn jackman, Commented Jun 6, 2018 at 18:45
I'm using the Bash that comes with the Windows download of Git (git-scm.com) - says it's 4.4.19. — Jake
– Jake, Commented Jun 6, 2018 at 18:56

yarl · Accepted Answer · 2018-06-06 19:00:17Z

1

(I don't know what hub is)

\n is a character that is converted by some command as a newline.

try inserting directly newlines

hub pull-request -m "$1

 Ticket: https://ticketsystem.net/issues/$2
 Target Release: $3
 Description: $4"

or use some function that interpred \n:

STR="$1\n\n Ticket: https://ticketsystem.net/issues/$2\n Target Release: $3\n Description: $4"
STR
hub pull-request -m "`printf "${STR}"`"

edited Jun 6, 2018 at 19:00

answered Jun 6, 2018 at 18:31

yarl

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2 Comments

glenn jackman Over a year ago

printf ${STR} leaves the variable unquoted, and it will destroy the whitespace formatting. Also, have to beware that the string may contain % characters with will cause printf errors. I don't recommend using printf without an explicit format string.

Jake Over a year ago

Worked great! FYI, hub is a wrapper for git for use on GitHub (github.com/github/hub).

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