From 54f135e3162ca42147259901f9d846a703dd8bc9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hannes=20K=C3=B6rber?= <hannes@hkoerber.de>
Date: Mon, 5 Oct 2020 22:06:58 +0200
Subject: [PATCH] bin: Add helper to get terraform target list from files

---
 bin/terraform-get-targets | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100755 bin/terraform-get-targets

diff --git a/bin/terraform-get-targets b/bin/terraform-get-targets
new file mode 100755
index 0000000..f4f7711
--- /dev/null
+++ b/bin/terraform-get-targets
@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+# Stolen from https://devops.stackexchange.com/a/8984 and adapted to my use case
+
+if [[ -z "$@" ]]; then
+  echo "Missing file input arguments"
+  exit 1
+fi
+
+for FILE in "$@"
+do
+  RESOURCE=$(sed -n 's/^resource "\([^"]*\)" "\([^"]*\)".*/-target=\1.\2 /gp' $FILE)
+  MODULE=$(sed -n 's/^module "\([^"]*\)".*/-target=module.\1 /gp' $FILE)
+  if [[ -z "$RESOURCE" ]] && [[ -z "$MODULE" ]]; then
+    echo "Cannot detect terraform resource and module in $FILE"
+    exit 1
+  fi
+
+  if [[ ! -z "$RESOURCE" ]]; then
+    echo -e $"$RESOURCE"
+  fi
+  if [[ ! -z "$MODULE" ]]; then
+    echo -e $"$MODULE"
+  fi
+done