tmignore list is difficult for other programs to parse

[nopdotcom]

Summary: tmignore list is hard for other programs to parse. It would be awesome if tmignore list -0 would print just an ASCII NUL-separated list.

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When I run tmignore list I get:

119 files/directories have been excluded from backups by tmignore:

  - /Users/nop/gh/project1/DerivedData/
  - /Users/nop/gh/project1/project1.xcodeproj/project.xcworkspace/xcuserdata/
[...]

I wanted to see how much space I was saving.

$ tmignore list | awk '/ - \// {print $3}' | xargs du -hsc
du: /Users/nop/gh/project1/DerivedData/\033[0;39m: No such file or directory
du: /Users/nop/gh/project1/project1.xcodeproj/project.xcworkspace/xcuserdata/[0;39m: No such file or directory
[...]

tmignore is emitting some kind of ANSI terminal code at the end of each line. That's rude if stdout isn't a terminal.

A more-working awk one-liner is:

$ tmignore list | awk -F$"( |\033)" '/ - \// {print $5}' | xargs du -hsc

Ideally, tmignore list -0 (or some other command) would produce a list of files separated by ASCII NUL characters, '\0'. The find, grep, and xargs commands support NUL-separated lists of files. (I really wish POSIX would prohibit filenames with newlines in them; as it is, only / and \0 are the only characters prohibited in filenames.)