Shell future

[hugelgupf]

Hi all,

we currently have several different shells to choose from.

• elvish -- cmds/core/elvish -- a fork of https://github.com/elves/elvish with some features removed for size (9.8M compiled, unstripped)
• goshsmall gosh -- cmds/core/gosh compiled with -tags=goshsmall -- a https://github.com/mvdan/sh derived shell without tab completion & history (4M compiled, unstripped)
• bubbline gosh -- cmds/core/gosh without any tags -- a https://github.com/mvdan/sh derived shell with tab completion & history, but 2MB than goshsmall larger due to using very nice editline terminal UI from github.com/knz/bubbline (6M compiled, unstripped)
• goshliner gosh -- gosh with tab completion and history with small dependencies #2897 introduces a cmds/core/gosh compiled with -tags=goshliner, which is 200K larger than goshsmall and uses a very bare bones but functioning editline library to provide tab completion & history (4.2M compiled, unstripped)
• rush -- cmds/exp/rush - our old old shell, (2.8M compiled, unstripped)

Which of these should we retain, which should we delete?

I'd like to nominate for deletion:

• elvish
• rush (does anyone need a shell smaller than goshsmall?)
• bubbline gosh

[rminnich]

I still need rush b/c at the moment it's the only thing that will run on bare metal.
I can try goshsmall but I'm dubious based on past experience.

[hugelgupf]

What'd be necessary to run gosh on bare metal?