readval is a command line tool which is designed for one specific purpose—to prompt for a value to be included in another command line. readval prints the prompt on the TTY, reads the input also from the TTY, and echoes the entered input to stdout.
Usage
$ readval -h
usage: ./readval [OPTIONS] prompt...
Prints prompts, reads input from TTY, and echoes it back on stdout.
-s, --silent Do not echo input
Examples
$ readval prompt </dev/null | od -c
prompt: foo
0000000 f o o \n
0000004
Or a more "real" example:
$ echo "foo=bar" \
| curl -s -XPOST -d @- "https://httpbin.org/post?user=$( readval Enter username )&pass=$( readval -s Enter password )" \
| jq .
Enter username: testuser
Enter password:
{
"args": {
"pass": "testpass",
"user": "testuser"
},
"data": "",
"files": {},
"form": {
"foo": "bar"
},
...
Installation
go install github.com/venkytv/[email protected]
