我如何在bash函数的字符串中使用参数

Question

I try:

ctests() {
    curl -X POST \
        http://route.to.host/cucumber/execute-tests \
        -H 'Authorization: Basic xxxxxxxxxxxxxxxxxxxxx' \
        -H 'Content-Type: application/json' \
        -H 'cache-control: no-cache' \
        -d '{ "text": "cucumber! alltests products=$1" }'
}

And want to call this like

> ctests someproduct

But $1 wont resolve. I tried ${1}, but its the same. Is there a nice solution for this?

Answer 1

the $1 doesn't resolve because you are using single-ticks ' which prohibit variable resolution.

use double-ticks ( " ) instead (you'll have to escape the double-quotes inside the double-quotes; or use single-quotes within the double-quotes; depending on your context)

ctests() {
    curl -X POST \
        http://route.to.host/cucumber/execute-tests \
        -H 'Authorization: Basic xxxxxxxxxxxxxxxxxxxxx' \
        -H 'Content-Type: application/json' \
        -H 'cache-control: no-cache' \
        -d "{ \"text\": \"cucumber! alltests products=$1\" }"
}

quoting bash(1) :

QUOTING

[...]

Enclosing characters in single quotes preserves the literal value of each character within the quotes. A single quote may not occur between single quotes, even when preceded by a backslash.

Enclosing characters in double quotes preserves the literal value of all characters within the quotes, with the exception of $ [...]