variables will not interpolated

[jkroepke]

Prerequisites

• [x] make sure you're are using the latest version by rush -V
• [x] read the usage (rush -h) and examples

Describe your issue

• [x] describe the problem Some Variable will not interpolated if the command contains some {.

I need this because: https://stackoverflow.com/questions/24597818/exit-with-error-message-in-bash-oneline

• [x] provide a reproducible example

Expected result:

seq 1 3 | rush -k '{ echo "{} {A}" && echo "{} {A}"; }' -v A=4
1 4
1 4
2 4
2 4
3 4
3 4

Actual result:

seq 1 3 | rush -k '{ echo "{} {A}" && echo "{} {A}"; }' -v A=4
{} 4
1 4
{} 4
2 4
{} 4
3 4

Workaround (use a sub shell):

seq 1 3 | rush -k '( echo "{} {A}" && echo "{} {A}"; )' -v A=4
1 4
1 4
2 4
2 4
3 4
3 4

[shenwei356]

Hi, I think it's a design flaw of place holder. For rush -k '{ echo "{} {A}" && echo "{} {A}"; }', rush think { echo "{} is a place holder.

We may use new format {{}}, {{var}} to avoid this bug.

[shenwei356]

Well, I fixed this, please help test it: https://github.com/shenwei356/rush/releases/tag/v0.4.1