Enable --template and --stdin to be used together?

[msabramo]

Currently --template and --stdin are mutually exclusive.

In other words, you can use --template:

$ node cli.js --template 'How about some {red.bold chocolate} & {blue.bold peanut butter}?'
How about some chocolate & peanut butter?

and you can use data from stdin:

$ echo 'How about some chocolate & peanut butter?' | node cli.js --stdin yellow
How about some chocolate & peanut butter?

but you can't use --template with data from stdin:

$ echo 'How about some {red.bold chocolate} & {blue.bold peanut butter}?' | node cli.js --template --stdin
Input required

I think it would be cool if this were possible. The last example with echo is a little silly because it can so easily be changed to the first command, but imagine if the "chalk markup" string were a lot longer and it were in a file, say chocolate-and-peanut-butter.chalk.txt and then you could do:

$ node cli.js --stdin < chocolate-and-peanut-butter.chalk.txt

[sindresorhus]

but you can't use --template with data from stdin:

Did you mean to add --template to that example?

[msabramo]

but you can't use --template with data from stdin:

Did you mean to add --template to that example?

Yes, thanks.

[sindresorhus]

I agree it would be useful to support this, but I also think it's weird that --template then can both accept a value and also be used as a boolean flag for stdin. I think we should then make it only a boolean flag and make the template always come as stdin or the first argument.