All Questions
44
questions
1
vote
1
answer
178
views
Run `git commit -m` with single quotes in zsh
I sometimes use characters such as ! and $ in commit messages, they need to be manually escaped, but not if you use single quotes like this git commit -m 'My $message here!'. I tried to write a ...
- 13
7
votes
2
answers
1k
views
Echoing "!" inside a string does some weird things [duplicate]
If I type in this:
echo "Hello, World!"
I don't know the name of it, but it prompts me for the next line. You know the PS2 thing. Or if you type echo \ and press Enter.
Why?
Well I know ...
- 1,034
2
votes
2
answers
133
views
Test fails (correctly) on command line, but succeeds (incorrectly) in script
For the sake of this question, assume that the glob /a/b/c/* produces no matches.
This means that the following test should fail (in other words, it should produce a non-zero $?):
[[ -n /a/b/c/*(#qN) ]...
- 15.6k
2
votes
2
answers
892
views
Escape variable for zsh's `print -P`
I was looking for a way to escape a variable containing format specifiers and special characters like quotes, backslashes and line breaks so that when passing it to print -P it'll print out literally.
...
- 3,724
1
vote
2
answers
341
views
Please explain the behavior of these parameter expansions using IFS?
I'm trying to figure out how to use the ${parameter%word} expansion with $@ and $*. It started by trying to make a script to combine pdfs using ghostscript, but I ran into some weird behavior with ...
- 53
0
votes
1
answer
182
views
How to set sed command correctly
When I try following commands, (I'd like to rewrite sql).
Day='2020/12/1'
Dir=/home/test/data
sql=`cat $Dir"/"$test".sql" | sed -e "s/Day/$Day/g"`
I suffered following ...
- 197
2
votes
1
answer
1k
views
Unable to run npm install with version specification
I am trying to run a simple npm install with zsh terminal.
npm install --save-dev @typescript-eslint/eslint-plugin@^4.0.0
zsh: no matches found: @typescript-eslint/eslint-plugin@^4.0.0
It appears ...
- 123
1
vote
1
answer
324
views
Using variables for Ghostscript options/flags causes errors
I am scripting the creation/manipulation of PDF files so I am using gs (Ghostscript). The problem I am having is that if I use a variable for the the options, gs errors out.
The command that I am ...
- 1,050
3
votes
1
answer
2k
views
What's the difference between test command and individual conditional expression surrounded by [[]]? [duplicate]
I am learning the zsh in the conditional expressions part, and I found some unreasonable output.
For example:
$ mkdir emptyspace && cd emptyspace
$ var_assigned_with_emptystring=""
$...
- 405
73
votes
1
answer
13k
views
What is the difference between the "...", '...', $'...', and $"..." quotes in the shell?
Sometimes I see shell scripts use all of these different ways of quoting some text: "...", '...', $'...', and $"...". Why are there so many different kinds of quote being used?
Do ...
- 77.1k
2
votes
1
answer
81
views
Generating quoted command arguments
I'm working with a HTTP API that demands a very particular set of signed headers + JSON body. And I really want to cURL it for debugging and sanity in general.
So, I've written a small script that, ...
- 123
10
votes
1
answer
17k
views
Using a variable as a case condition in zsh
My question is the zsh equivalent of the question asked here: How can I use a variable as a case condition? I would like to use a variable for the condition of a case statement in zsh. For example:
...
- 393
6
votes
3
answers
7k
views
shell: Quote string with single quotes rather than backslashes
How can I quote a string with single quotes?
Eg, I can do:
$ printf "%q\n" 'two words'
two\ words
$
Is there a way to get a single- (or double-) quoted string as output, ie:
$ MAGIC 'two words'
'...
- 31.2k
25
votes
5
answers
9k
views
Why doesn't alias foo='echo "This is a quote: \'"' work? [duplicate]
In order to remind myself when I try to use shopt in Zsh instead of setopt, I created the following alias, testing it first at a shell prompt:
$ alias shopt='echo "You\'re looking for setopt. This is ...
- 9,248
5
votes
1
answer
3k
views
Command substitution not occurring for PS1 variable in zsh
I'm having the hardest time trying to get dynamically evaluated command output in my PS1 prompt with zsh on Ubuntu 17.10. Here are a few attempts I've made (I begin in directory /abc, and the prompt ...
- 269