From a4d09aa6aeb1961f7ee8f239fec5b5c5f9297857 Mon Sep 17 00:00:00 2001
From: root <root@vps-18a7a2b7.vps.ovh.ca>
Date: Wed, 24 Jan 2024 09:55:52 -0500
Subject: export-json.bash WIP

---
 wordpress/export-json.bash | 103 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 wordpress/export-json.bash

(limited to 'wordpress/export-json.bash')

diff --git a/wordpress/export-json.bash b/wordpress/export-json.bash
new file mode 100644
index 0000000..343e66d
--- /dev/null
+++ b/wordpress/export-json.bash
@@ -0,0 +1,103 @@
+#!/bin/bash
+
+# This script allows bash to export environment
+# variables as JSON. It uses the external tool
+# "jq" to parse string values # placed in jq's
+# argument list by bash and then encode them
+# as JSON string values. This is no accidental
+# dependency. The jq program is the foundation of
+# the trustworthiness of this code. If we were
+# encoding JSON strings in bash (and not just JSON
+# objects containing strings) we would have to be
+# a lot more careful.
+
+# This is the simple code I wanted to replace:
+#
+# jq --arg SITE "$SITE" "$json"
+# jq -n \
+# 	--arg h "$db_host" \
+# 	--arg u "$db_user" \
+# 	--arg p "$db_password" \
+# 	--arg n "$db_name" \
+# 	--arg t "$table_prefix" \
+# 	'{ db_host: $h
+# 	 , db_user: $u
+# 	 , db_password: $p
+# 	 , db_name: $n
+# 	 , table_prefix: $t
+# 	 }'
+#
+# The problem with the above is that the names are repeated.
+# This creates the possibility that the names not match,
+# creating a bug.
+# This code allows the names to be specified only one time.
+# It allows the bug where the names do not match to be fixed only one
+# time by one person.
+# IF ... the fix can be distributed back to the extant copies.
+# How to get the beneficial mutations
+# back into the living organisms?
+# Life tries not to answer this question
+# until very late in its development
+# since after all
+# the extant copies are the past
+# and life looks into the future
+# but because consciousness
+# is the mirror of time
+# the question is asked
+# eventually
+
+export_JSON()
+{
+	declare -a exported_vars=()
+	declare -A displayname=()
+	while [ $# -gt 0 ]
+	do
+		case "$1" in
+			v | exported_vars | displayname | jqargs | jqjson | n )
+				continue
+				;;
+			*[^a-zA-Z0-9_=]* | *=*=* )
+				continue
+				;;
+			[a-zA-Z_]*=* )
+				exported_vars+=("${1%=*}")
+				displayname["${1%=*}"]=${1#*=}
+				;;
+			[a-zA-Z_]* )
+				exported_vars+=("$1")
+				;;
+		esac
+		shift
+	done
+	export_with_jq
+}
+
+export_with_jq()
+{
+	n=$'\n'
+	jqargs=("-n")
+	jqjson=
+	for v in "${exported_vars[@]}"
+	do
+		if ! [ -v "$v" ]
+		then
+			echo "Warning: not defined: $v" >&2
+			continue
+		fi
+		jqargs+=(--arg "$v" "${!v}")
+		if [ "$jqjson" ]
+		then
+			p=','
+		else
+			p='{'
+		fi
+		dv=${displayname[$v]}
+		jqjson="$jqjson$p ${dv:-$v}: \$$v$n"
+	done
+	if [ "$jqjson" ]
+	then
+		jqjson="$jqjson}$n"
+	fi
+	jq -n "${jqargs[@]}" "$jqjson"
+}
+
-- 
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