From d9bcbaf71b0173fe44d7e07c05d110c49c07b6f2 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Tue, 27 Jun 2023 11:52:24 -0400
Subject: tests: Get more tests passing with --bfs=tests/find-color.sh

---
 tests/ls-color.sh | 37 ++++++++++++++++++++++++++++++++-----
 1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/tests/ls-color.sh b/tests/ls-color.sh
index 6d33f53..9fdd59c 100755
--- a/tests/ls-color.sh
+++ b/tests/ls-color.sh
@@ -7,17 +7,44 @@
 
 set -e
 
+function parse_ls_colors() {
+    for key; do
+        local -n var="$key"
+        if [[ "$LS_COLORS" =~ (^|:)$key=(([^:]|\\:)*) ]]; then
+            var="${BASH_REMATCH[2]}"
+            # Interpret escapes
+            var=$(printf "$var" | sed $'s/\^\[/\033/g; s/\\\\:/:/g')
+        fi
+    done
+}
+
+function re_escape() {
+    # https://stackoverflow.com/a/29613573/502399
+    sed 's/[^^]/[&]/g; s/\^/\\^/g' <<<"$1"
+}
+
+rs=0
+lc=$'\033['
+rc=m
+ec=
+no=
+
+parse_ls_colors rs lc rc ec no
+: "${ec:=$lc$rs$rc}"
+
+strip="(($(re_escape "$lc$no$rc"))?($(re_escape "$ec")|$(re_escape "$lc$rc")))+"
+
+function ls_color() {
+    # Strip the leading reset sequence from the ls output
+    ls -1d --color "$@" | sed -E "s/^$strip([a-z].*)$strip/\4/; s/^$strip//"
+}
+
 L=
 if [ "$1" = "-L" ]; then
     L="$1"
     shift
 fi
 
-function ls_color() {
-    # Strip the leading reset sequence from the ls output
-    ls -1d --color "$@" | sed $'s/^\033\\[0m//'
-}
-
 DIR="${1%/*}"
 if [ "$DIR" = "$1" ]; then
     ls_color "$1"
-- 
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