2019-06-05 12:38:12 -07:00
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#!/usr/bin/env sh
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2021-07-29 00:37:35 -07:00
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# YES_ZSH
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2021-07-29 05:44:12 -07:00
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# YES_BASH
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# YES_DASH
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2021-09-23 07:15:19 -07:00
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# YES_ASH
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# works with busybox awk.
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2021-07-29 00:37:35 -07:00
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2021-07-30 19:41:16 -07:00
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countdiff() { ### @-
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2021-08-01 08:27:08 -07:00
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### count the number of lines changed between two files.
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###
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### **TODO:** don't use git for this. also, use patience algorithm.
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###
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### ```
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### $ countdiff README-old.md README.md
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### 739
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### ```
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2021-07-29 05:44:12 -07:00
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[ $# -gt 1 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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2021-07-29 00:37:35 -07:00
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[ $# -le 2 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
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2019-06-05 12:38:12 -07:00
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git --no-pager diff --stat --no-color --no-index "$1" "$2" \
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| awk '/changed/{print $4+$6;a=1}END{if(!a)print 0}'
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}
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2021-07-29 00:37:35 -07:00
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2021-08-02 13:48:46 -07:00
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[ -n "${preload+-}" ] || countdiff "$@"
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