How open two files but one came from stdout

Question

all these works

git show bf5500a8 | vim -R - 

vim file1 file2 -O 

git show bf5500a8 > tmpfile ; vim tmpfile  file2 -O ; rm tmpfile 

but I'd like to know if I can open stdout and other file directly , without create a tmp file ?

UPDATE 2021.03.15 : What I really like to know is how vim can replace "-" and use pipe stdout as input. To, for example, open two files in split mode but one came from stdout , Note I'd like use -O option (vertical split mode) and stdout be on left side ...

Thank you

Answer 1

Try -c which allows you to specify an Ex command to be run after the first file is loaded...

git show bf5500a8 | vim -c 'e /path/to/file' -

You want them in a split?

git show bf5500a8 | vim -c 'split /path/to/file' -

Update: Since you insist on using the -O flag I can show you a trick sort of works from Bash-like shells only but Vim is not intended to be used this way and you may get funky results....

git show bf5500a8 | vim -O /dev/stdin /path/to/file

Note the warning you get.

When you exit and your shell seems unresponsive you can type reset.

Like I said, this is not how Vim is meant to work. If you want to do stream editing you can use Ex mode How can you use vim as a stream editor? ... but you're not going to get a clean result using -O without hacks. You might also look at vipe or vim-stream.

Also, you added the -O requirement after I originally posted a fully working solution to your original question so all of this is really above and beyond the call of duty.

Answer 2

The solution

vim <(git show bf5500a8) /path/to/file -O

based on solution to compare two commits https://stackoverflow.com/a/23527631/778517