Improve OS detection, exit on unsupported OSs

docs/system_detection.md

@@ -0,0 +1,9 @@
+tori determines what is the running operating system through the output of `uname -s`. If it cannot get a descriptive enough, it will look for the `/etc/os-release` file.
+
+If a `/etc/os-release` file is present, it takes precedence over the output of `uname`. Both the `NAME` and `ID` values will be looked at. This is aimed at helping to disambiguate between different variants of the same operating system.
+
+The `NAME` value may be the only queried value if for the given supported operating system it is enough to disambiguate between the variants tori needs to be aware of.
+
+In case there is no `/etc/os-release` file found, the output of `uname` is the next value considered.
+
+If a supported operating system is not detected on neither of these, tori will exit with an error.

src/index.sh

@@ -1,4 +1,6 @@
 . "$TORI_ROOT/src/check.sh"
 . "$TORI_ROOT/src/configuration.sh"
-. "$TORI_ROOT/src/package.sh"
+. "$TORI_ROOT/src/package/package.sh"
+. "$TORI_ROOT/src/package/package_resolution.sh"
 . "$TORI_ROOT/src/utility.sh"
+. "$TORI_ROOT/src/system.sh"

src/package/package.sh

@@ -0,0 +1,27 @@
+# package management functions
+
+get_user_packages() {
+	cat $CONFIG_ROOT/packages | sort | uniq
+}
+
+package_manager() {
+	local command="$1"
+	local manager
+	local args__get_manually_installed
+	local output
+
+	if [ $OS = "FreeBSD" ]; then
+		manager="pkg"
+		args__get_manually_installed='query -e "%a = 0" "%n"'
+	fi
+
+	if [ "$command" = 'get_manually_installed' ]; then
+		output=$(eval $manager $args__get_manually_installed)
+		printf "$output"
+	fi
+}
+
+get_system_packages() {
+	local packages=$(package_manager get_manually_installed)
+	printf "$packages"
+}

src/package/package_resolution.sh

@@ -1,31 +1,3 @@
-# package management functions
-
-get_user_packages() {
-	cat $CONFIG_ROOT/packages | sort | uniq
-}
-
-package_manager() {
-	local command="$1"
-	local manager
-	local args__get_manually_installed
-	local output
-
-	if [ $OS = "FreeBSD" ]; then
-		manager="pkg"
-		args__get_manually_installed='query -e "%a = 0" "%n"'
-	fi
-
-	if [ "$command" = 'get_manually_installed' ]; then
-		output=$(eval $manager $args__get_manually_installed)
-		printf "$output"
-	fi
-}
-
-get_system_packages() {
-	local packages=$(package_manager get_manually_installed)
-	printf "$packages"
-}
-
 resolve_packages() {
 	local strategy=
 
@@ -50,6 +22,8 @@ resolve_packages() {
 
 		if [ "$strategy" = 1 ]; then
 			: # TODO
+		elif [ $strategy -eq 6 ]; then
+			return 0
 		fi
 	fi
 
@@ -68,6 +42,8 @@ resolve_packages() {
 
 		if [ $strategy -eq 1 ]; then
 			: # TODO
+		elif [ $strategy -eq 6 ]; then
+			return 0
 		fi
 	fi
 }

src/system.sh

@@ -0,0 +1,19 @@
+get_operating_system() {
+	local uname_output="$(uname -s)"
+	local os_release_name="$(cat \
+		/etc/os-release | grep '^NAME=' | sed 's/NAME=//')"
+	local os_release_id="$(cat \
+		/etc/os-release | grep '^ID=' | sed 's/ID=//')"
+
+	log debug "uname OS: $uname_output"
+	log debug "os-release OS name: $os_release_name"
+	log debug "os-release OS ID: $os_release_id"
+
+	if [ "$os_release_name" = FreeBSD ]; then
+		echo "FreeBSD"
+		return 0
+	else
+		log fatal "Unsupported operating system"
+		return 1
+	fi
+}

src/tori

@@ -1,5 +1,6 @@
 #! /usr/bin/env sh
 
+# paths
 VERSION="0.0.4 2024-06-30"
 TORI_ROOT="$HOME/tori"
 CONFIG_ROOT="$HOME/.config/tori"
@@ -13,8 +14,10 @@ TMP_DIR="/tmp/tori"
 argument="$1"
 parameter="$2"
 
+set_opts -
+
 ## global constants
-OS="$(uname -s)"
+OS="$(get_operating_system)"
 
 ## global state
 base_files=

src/utility.sh

@@ -13,6 +13,14 @@ log() {
 	fi
 }
 
+set_opts() {
+  sign="$1"
+
+  set "${sign}o" errexit
+  set "${sign}o" nounset
+  set "${sign}o" pipefail
+}
+
 prepare_directories() {
 	if ! [ -d "$TMP_DIR" ]; then
 		mkdir "$TMP_DIR"