Add var subcommand

2 files changed, 42 insertions, 0 deletions

diff --git a/lib/main.bash b/lib/main.bash
index b5d6cc3..42ce373 100644
--- a/lib/main.bash
+++ b/lib/main.bash
@@ -81,6 +81,7 @@ Usage:
 	$BASHTARD_NAME ssh <command>
 	$BASHTARD_NAME sync [playbook]
 	$BASHTARD_NAME sysinfo
+	$BASHTARD_NAME var <key> [value]
 
 Perform maintenance on your infra.
 
@@ -92,6 +93,7 @@ Commands:
 	sync     Pull latest changes through git, and synchronize all added
 	         playbooks.
 	sysinfo  Show gathered information about this system.
+	var      Show or set the value of a given configuration key.
 
 Playbooks:
 EOF
diff --git a/lib/subcommands/var.bash b/lib/subcommands/var.bash
new file mode 100644
index 0000000..60bfe81
--- /dev/null
+++ b/lib/subcommands/var.bash
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: 2022 Patrick Spek <p.spek@tyil.nl>
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+subcommand()
+{
+	local key
+	local value
+
+	# TODO: Handle opts
+
+	key="$1" ; shift
+	value="$1" ; shift
+
+	if [[ -z "$key" ]]
+	then
+		emerg "bashtard/var" "You must supply a key"
+		return 3
+	fi
+
+	if [[ -z "$value" ]]
+	then
+		# Just show the value of the given key
+		printf "%s=%s\n" "$key" "$(config "$key")"
+		return
+	fi
+
+	# Set the var for this specific host
+	local kvfile
+	local buffer
+
+	kvfile="$BASHTARD_ETCDIR/hosts.d/${BASHTARD_PLATFORM[fqdn]}"
+	buffer="$(tmpfile)"
+
+	grep -v "^$key=" < "$kvfile" > "$buffer"
+	printf "%s=%s\n" "$key" "$value" >> "$buffer"
+	sort "$buffer" > "$kvfile"
+}