Open Radar

 
Area:
Something not on this list

Summary:
file's documentation clearly states that the -I and --mime flags are equivalent:

-I, --mime
             Causes the file command to output mime type strings rather than
             the more traditional human readable ones.  Thus it may say
             `text/plain; charset=us-ascii' rather than ``ASCII text''.

Thus, one would expect that "file -I test" and "file --mime test" give the exact same output. However, this is not the case:

$ file -I test
test: text/plain; charset=us-ascii
$ file --mime test
test: regular file

I'm thinking that file's broken, instead of the documentation, since the documentation matches how it's been for years.

Steps to Reproduce:
1. Find a plain text file (or generate one: echo "test" > test).
2. Run file -I and file --mime on this file.

Expected Results:
The output is identical.

Observed Results:
The output differs; file -I seems to be correct, but not file --mime.

Version:
macOS High Sierra 10.13 Beta (17A264c)

Notes:
Regression from macOS Sierra, I believe. I know this used to work until relatively recently.

Configuration:
Early 2015 MacBook Pro with Retina Display running macOS High Sierra 10.13 Beta (17A264c)