fix(add): Better error message when missing npm specifier

[nathanwhit]

Before:

After:

[marvinhagemeister]

Nice, this is a great DX improvement! Wondering if we should we print deno add npm:ajv without the version as the command as that would match more what the user would type. I'm mainly worried that otherwise users would think that they'd need to provide the version arg themselves.

[nathanwhit]

Nice, this is a great DX improvement! Wondering if we should we print deno add npm:ajv without the version as the command as that would match more what the user would type. I'm mainly worried that otherwise users would think that they'd need to provide the version arg themselves.

Good idea! I changed it so that we suggest whatever the user specified, but with npm:. So if you do

deno add ajv

we suggest

deno add npm:ajv

and if you do

deno add ajv@8

we suggest

deno add npm:ajv@8

[marvinhagemeister]

Nice, this is a great DX improvement! Wondering if we should we print deno add npm:ajv without the version as the command as that would match more what the user would type. I'm mainly worried that otherwise users would think that they'd need to provide the version arg themselves.

Good idea! I changed it so that we suggest whatever the user specified, but with npm:. So if you do

deno add ajv

we suggest

deno add npm:ajv

and if you do

deno add ajv@8

we suggest

deno add npm:ajv@8

Perfect, this is even better!