From 4204732ee7a0dee22b2c5aa6decc600a13ca02b4 Mon Sep 17 00:00:00 2001
From: root <root@vps-18a7a2b7.vps.ovh.ca>
Date: Fri, 9 Feb 2024 17:34:43 -0500
Subject: rewrite create-wp-config with --fqdn functionality to derive entire
 config from hostname

---
 wordpress/wordpress-create-wp-config | 112 ++++++++++++++++++++++++++++-------
 1 file changed, 91 insertions(+), 21 deletions(-)

diff --git a/wordpress/wordpress-create-wp-config b/wordpress/wordpress-create-wp-config
index d0f4447..5c756d9 100755
--- a/wordpress/wordpress-create-wp-config
+++ b/wordpress/wordpress-create-wp-config
@@ -1,16 +1,86 @@
-#!/bin/sh
-
-DB_NAME=$1
-DB_USER=$2
-DB_PASSWORD=$(tr -cd a-z < /dev/urandom | head -c14)
-Random1=$(tr -cd 0-9a-f < /dev/urandom | head -c32)
-Random2=$(tr -cd 0-9a-f < /dev/urandom | head -c32)
-Random3=$(tr -cd 0-9a-f < /dev/urandom | head -c32)
-Random4=$(tr -cd 0-9a-f < /dev/urandom | head -c32)
-Random5=$(tr -cd 0-9a-f < /dev/urandom | head -c32)
-Random6=$(tr -cd 0-9a-f < /dev/urandom | head -c32)
-Random7=$(tr -cd 0-9a-f < /dev/urandom | head -c32)
-Random8=$(tr -cd 0-9a-f < /dev/urandom | head -c32)
+#!/bin/bash
+set -e
+set -o pipefail
+
+rand64()
+{
+	set -- "${1:-64}"
+	[ "$1" -ge 4 ] &&
+	set -- "$1" "$(head -c "$(($1 * 3 / 4))" < /dev/urandom | base64)" &&
+	[ "${#2}" = "$1" ] &&
+	printf '%s\n' "$2"
+}
+
+rand26()
+{
+	set -- "${1:-32}" &&
+	[ "$1" -ge 4 ] &&
+	set -- "$1" "$(tr -cd a-z </dev/urandom | head -c "$1")" &&
+	[ "${#2}" = "$1" ] &&
+	printf '%s\n' "$2"
+}
+
+usage()
+{
+	cat <<END >&2
+Usage:
+	$0 <--fqdn>
+	$0 <hostname> <db name> <username>
+	$0 <-h | --help>
+
+  With --fqdn, parameters are derived from \$(hostname --fqdn) or
+  locally: $(hostname --fqdn)
+END
+}
+
+case "$# $1" in
+	"1 --fqdn" )
+		DB_HOST=$(hostname --fqdn)
+		DB_NAME=wordpress@$DB_HOST
+		DB_USER=$DB_NAME
+		;;
+	"3 "* )
+		DB_NAME=$1
+		DB_USER=$2
+		DB_HOST=$3
+		;;
+	"1 -h" | "1 --help" )
+		usage
+		exit 0
+		;;
+	* )
+		usage
+		exit 1
+		;;
+esac
+for v in DB_NAME DB_USER DB_HOST
+do
+	[ "${!v}" ] && continue
+	printf 'Error: a required environment variable is not defined: $%s\n' \
+		"$v" >&2
+	exit 1
+done
+if ! [ -v DB_PASSWORD ]
+then
+	DB_PASSWORD=$(rand26 32)
+fi
+
+declare -a WP_SALT_VARS=(
+	AUTH_KEY
+	SECURE_AUTH_KEY
+	LOGGED_IN_KEY
+	NONCE_KEY
+	AUTH_SALT
+	SECURE_AUTH_SALT
+	LOGGED_IN_SALT
+	NONCE_SALT
+)
+for v in "${WP_SALT_VARS[@]}"
+do
+	[ -v "$v" ] && [ -n "${!v}" ] && continue
+	eval "$v=\$(rand64)" &&
+	eval "[ \${#$v} -gt 16 ]" || exit 4
+done
 
 cat <<END
 <?php
@@ -63,14 +133,14 @@ define( 'DB_COLLATE', '' );
  *
  * @since 2.6.0
  */
-define( 'AUTH_KEY',         '$Random1' );
-define( 'SECURE_AUTH_KEY',  '$Random2' );
-define( 'LOGGED_IN_KEY',    '$Random3' );
-define( 'NONCE_KEY',        '$Random4' );
-define( 'AUTH_SALT',        '$Random5' );
-define( 'SECURE_AUTH_SALT', '$Random6' );
-define( 'LOGGED_IN_SALT',   '$Random7' );
-define( 'NONCE_SALT',       '$Random8' );
+define( 'AUTH_KEY',         '$AUTH_KEY' );
+define( 'SECURE_AUTH_KEY',  '$SECURE_AUTH_KEY' );
+define( 'LOGGED_IN_KEY',    '$LOGGED_IN_KEY' );
+define( 'NONCE_KEY',        '$NONCE_KEY' );
+define( 'AUTH_SALT',        '$AUTH_SALT' );
+define( 'SECURE_AUTH_SALT', '$SECURE_AUTH_SALT' );
+define( 'LOGGED_IN_SALT',   '$LOGGED_IN_SALT' );
+define( 'NONCE_SALT',       '$NONCE_SALT' );
 
 /**#@-*/
 
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