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Use cksum in the disco prompt
It's posix, and apparently faster on slow systems. I literally can't see a measurable difference on mine.
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1 changed files with 11 additions and 4 deletions
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@ -14,12 +14,19 @@ function fish_prompt
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fish_is_root_user; and set delim "#"
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set -l cwd (set_color $fish_color_cwd)
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if command -sq sha256sum
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if command -sq cksum
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# randomized cwd color
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set -l shas (pwd -P | sha256sum | string sub -l 6 | string match -ra ..)
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# Increase color a bit so we don't get super dark colors.
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# We hash the physical PWD and turn that into a color. That means directories (usually) get different colors,
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# but every directory always gets the same color. It's deterministic.
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# We use cksum because 1. it's fast, 2. it's in POSIX, so it should be available everywhere.
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set -l shas (pwd -P | cksum | string split -f1 ' ' | math --base=hex | string sub -s 3 | string match -ra ..) 0 0 0
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# We get a fourth byte, just distribute it among the others.
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# Also increase the value a bit so we don't get super dark colors.
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# Really we want some contrast to the background (assuming black).
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set -l col (for f in $shas; math --base=hex "min(255, 0x$f + 0x30)"; end | string replace 0x '' | string pad -c 0 -w 2 | string join "")
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set -l smear 0x30
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set -q shas[4]
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and set smear (math 0x$shas[4] / 3 + 0x30)
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set -l col (for f in $shas[1..3]; math --base=hex "min(255, 0x$f + $smear)"; end | string replace 0x '' | string pad -c 0 -w 2 | string join "")
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set cwd (set_color $col)
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end
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