From 9e474ffadeaa01b01e409b7c3a4c1aa15ed14499 Mon Sep 17 00:00:00 2001
From: Daniel Langbein <daniel@systemli.org>
Date: Thu, 16 Mar 2023 19:09:47 +0100
Subject: [PATCH] feat: specify cfg location; create single executable file

---
 .gitignore           |  1 +
 Makefile             | 14 ++++++++++++++
 de-p1st-installer.sh | 32 ++++++++++++++++++++++++--------
 3 files changed, 39 insertions(+), 8 deletions(-)

diff --git a/.gitignore b/.gitignore
index 43f4d1b..f9ed7f7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /.idea/
 /arch-installer/
 /de-p1st-installer-*-any.pkg.tar.zst
+/*-binary.sh
\ No newline at end of file
diff --git a/Makefile b/Makefile
index d6346e0..7f653fa 100644
--- a/Makefile
+++ b/Makefile
@@ -3,3 +3,17 @@ all: test
 
 test:
 	shellcheck --check-sourced --external-sources de-p1st-installer.sh
+
+SINGLE_FILE_CFG := example-vbox.cfg
+SINGLE_FILE_DST := example-vbox-binary.sh
+single-file:  # Creates a single, executable .sh file a given configuration file.
+	py-replace --text 'main "' --repl '# main "' --count 1 \
+		< de-p1st-installer.sh \
+		> single-file-temp.sh
+	chmod +x single-file-temp.sh
+	bash -v ./single-file-temp.sh example-vbox.cfg 2>&1 | \
+		py-regex-replace --pattern '^\s*source\s+.+$$' --repl ': # sourced file included below:' --count '-1' | \
+		py-replace --text '# main "' --repl 'main "' --count 1 \
+		> ${SINGLE_FILE_DST}
+	rm single-file-temp.sh
+	chmod +x ${SINGLE_FILE_DST}
diff --git a/de-p1st-installer.sh b/de-p1st-installer.sh
index f8936f1..d636c41 100755
--- a/de-p1st-installer.sh
+++ b/de-p1st-installer.sh
@@ -4,16 +4,18 @@ set -e
 # Exit on undefined variable reference.
 set -u
 
-# Check if run from installation or locally (development setup).
-# -> Print commands before they get executed (set -v).
-# -> Determine library directory.
-script_dir="$(dirname "${BASH_SOURCE[0]}")" || exit 1
-if [ "${script_dir}" = '/usr/bin' ]; then
-  # This script has been installed.
+script_dir="$(dirname "${BASH_SOURCE[0]}")"
+
+function script_is_installed(){
+  # Check if this script is run installed or locally (development setup).
+  [ "${script_dir}" = '/usr/bin' ]
+}
+
+if script_is_installed; then
   lib_dir='/usr/lib/de-p1st-installer'
 else
-  # This script is run locally (development setup).
   lib_dir='./lib'
+  # Print commands before they get executed.
   set -v
 fi
 
@@ -25,9 +27,23 @@ source "${lib_dir}"/user-input.sh
 # shellcheck source=lib/block-device.sh
 source "${lib_dir}"/block-device.sh
 
+# Get path of configuration file.
+if [ $# -eq 0 ]; then
+  # No arguments given.
+  if script_is_installed; then
+    cfg_file=/etc/de-p1st-installer/installer.cfg
+  else
+    cfg_file="${script_dir}"/installer.cfg
+  fi
+else
+  # >= 1 arguments given.
+  # First argument is the configuration file!
+  cfg_file="${1}"
+fi
+
 # Source the configuration file.
 # shellcheck source=installer.cfg
-source /etc/de-p1st-installer/installer.cfg
+source "${cfg_file}"
 
 function main() {
   # @pre