commit 6e9f2c25677285f4b35b43b7d68e7bdac0a4bdc2
Author: Kerin Millar <kfm@plushkava.net>
Date:   Thu May 28 08:52:03 2026 +0100

    phase-helpers.sh: simplify the quoting mechanism of edo()
    
    Presently, the edo() function determines whether each parameter merits
    quoting by:
    
    1) comparing against a hard-coded ERE to check for shell metacharacters
    2) comparing against another ERE to ensure all characters are printable
    
    Simplify matters by instead going about it in this way:
    
    1) transforming the parameter with printf %q
    2) checking whether the transformed parameter matches the original
    
    Should the transformed parameter match the original, the original shall
    be appended to the output string. Otherwise, the original parameter
    shall be appended to the output string after having been subjected to
    ${param@Q} expansion. This is the same technique that is employed by
    gentoo-functions, since v1.7.7.
    
    Link: https://gitweb.gentoo.org/proj/gentoo-functions.git/commit/?id=7abe8bdd12c1
    Signed-off-by: Kerin Millar <kfm@plushkava.net>

diff --git a/bin/phase-helpers.sh b/bin/phase-helpers.sh
index 3d4b4905b..8c8f95e55 100644
--- a/bin/phase-helpers.sh
+++ b/bin/phase-helpers.sh
@@ -1230,16 +1230,17 @@ fi
 
 if ___eapi_has_edo; then
 	edo() {
-		# list of special characters taken from sh_contains_shell_metas
-		# in shquote.c (bash-5.2)
-		local a out regex='[] '\''"\|&;()<>!{}*[?^$`]|^[#~]|[=:]~'
+		local out qa a
 
 		[[ $# -ge 1 ]] || die "edo: at least one argument needed"
 
 		for a; do
 			# quote if (and only if) necessary
-			[[ ${a} =~ ${regex} || ! ${a} =~ ^[[:print:]]+$ ]] && a=${a@Q}
-			out+=" ${a}"
+			if printf -v qa %q "${a}"; [[ ${qa} == "${a}" ]]; then
+				out+=" ${a}"
+			else
+				out+=" ${a@Q}"
+			fi
 		done
 
 		einfon