[BUG] The temporary file name is longer than the target file name

[zkochan]

What / Why

This library creates a temp file by appending some hash to the target file name. This is bad because when the target file name is really long (but still inside the filesystem limit) the temp file name might get out of that limit and a ENAMETOOLONG error will happen

We started to have this issue in pnpm v5, where we have really long file names in the content-addressable storage.
Related issue: pnpm/pnpm#2605

How

Current Behavior

The temp file name is the <target file>.<hash>

Steps to Reproduce

Write a file that has a name 1 character shorter than the accepted limit.

Expected Behavior

The temp file name is short or at least not longer than the target file name.

References

pnpm/pnpm#2605