APFS Japanese Kana Compatibility PoC
Read more on this detailed post: Accented Latin and Kana File Names Finally Work as Expected in APFS
Problem of Kana File Name
In HFS+, file name will be decomposed to Unicode NFD form. So a file named
ありがとう will be decomposed to
where U+3099 is a 濁点 sound mark.
When we build an image that is based on Linux, Docker doesn't compose the string back to NFC form, thus any file with 濁点 or 半濁点 will not be accessible.
$ docker build -t test-image . $ docker run test-image cat ありがとう.txt cat: can't open '/ありがとう.txt': No such file or directory
Becuase the file name is in NFD form, it can only be accessed by
APFS has no such problem
In APFS, file names are not decomposed to NFD form, thus there is no such problem.
To try it, first upgrade to macOS 10.12.4+.
Create a disk:
hdiutil create -fs APFS -size 1GB foo.sparseimage
Mount it, and
cd to it in the terminal.
Now try again:
$ docker build -t test-image . $ docker run test-image ありがとう.txt ありがとう means Thank You!