Add template install-system shell script to live ISO

flake.lock

@@ -158,6 +158,22 @@
         "type": "github"
       }
     },
+    "install-system": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "path": "scripts/install-system",
+        "type": "path"
+      },
+      "original": {
+        "path": "scripts/install-system",
+        "type": "path"
+      },
+      "parent": []
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1753345091,
@@ -203,6 +219,7 @@
     "root": {
       "inputs": {
         "home-manager": "home-manager",
+        "install-system": "install-system",
         "nixpkgs": "nixpkgs",
         "stylix": "stylix"
       }

flake.nix

@@ -11,9 +11,14 @@
       url = "github:danth/stylix/release-25.05";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+
+    install-system = {
+      url = "path:scripts/install-system";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
-  outputs = { nixpkgs, home-manager, ... } @ inputs: let
+  outputs = { nixpkgs, home-manager, install-system, ... } @ inputs: let
     system = "x86_64-linux";
     host = "vm";
     profile = "vm";
@@ -43,6 +48,7 @@
         };
         modules = [
           (nixpkgs + "/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix")
+          { environment.systemPackages = [ install-system.packages.${system}.default ]; }
           ./hosts/${host}
         ];
       };

scripts/_template/flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1753749649,
+        "narHash": "sha256-+jkEZxs7bfOKfBIk430K+tK9IvXlwzqQQnppC2ZKFj4=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "1f08a4df998e21f4e8be8fb6fbf61d11a1a5076a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

scripts/_template/flake.nix

@@ -0,0 +1,30 @@
+{
+  description = "_template package and shell environment";
+
+  inputs = {
+    nixpkgs.url  = "github:nixos/nixpkgs/nixos-25.05";
+  };
+
+  outputs = { self, nixpkgs, ... }: let
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system}.pkgs;
+    name = builtins.baseNameOf (builtins.toString ./.);
+    shellApplication = pkgs.writeShellApplication {
+      inherit name;
+
+      text = builtins.readFile ./${name}.sh;
+
+      runtimeInputs = with pkgs; [
+        coreutils
+        gnused
+        unixtools.column
+      ];
+    };
+  in {
+    packages.${system}.default = shellApplication;
+
+    devShells.${system}.default = pkgs.mkShell {
+      packages = [ shellApplication ];
+    };
+  };
+}

scripts/_template/template.sh

@@ -0,0 +1,140 @@
+#!/usr/bin/env bash
+# https://github.com/nicolas-goudry/nix-config
+
+# set +e # Do not exit on error
+set -e # Exit on error
+set +u # Allow unset variables
+# set -u # Exit on unset variable
+# set +o pipefail # Disable pipefail
+set -o pipefail # Enable pipefail
+
+script_name=$(basename "${0}")
+nc="\e[0m" # Unset styles
+bld="\e[1m" # Bold text
+dim="\e[2m" # Dim text
+red="\e[31m" # Red foreground
+green="\e[32m" # Green foreground
+yellow="\e[33m" # Yellow foreground
+blue="\e[34m" # Blue foreground
+
+to_stderr() {
+  >&2 echo -e "${*}"
+}
+
+to_stdout() {
+  echo -e "${*}"
+}
+
+error() {
+  to_stderr " ${red}×${nc} ${*}"
+}
+
+warn() {
+  to_stderr " ${yellow}⚠${nc} ${*}"
+}
+
+info() {
+  to_stdout " ${blue}i${nc} ${*}"
+}
+
+debug() {
+  if [ -n "${debug}" ]; then
+    to_stderr " ${dim}▶ ${*}${nc}"
+  fi
+}
+
+success() {
+  to_stdout " ${green}✓${nc} ${*}"
+}
+
+trace() {
+  to_stderr "Stacktrace:"
+
+  local i=1 line file func
+  while read -r line func file < <(caller ${i}); do
+    to_stderr "[${i}] ${file}:${line} ${func}(): $(sed -n "${line}p" "${file}")"
+    ((i++))
+  done
+}
+
+# shellcheck disable=SC2120
+die() {
+  if [ "${#}" -gt 0 ]; then
+    error "${*}"
+  fi
+
+  exit 1
+}
+
+needs_arg() {
+  if [ -z "${OPTARG}" ]; then
+    >&2 echo "${0}: option requires an argument -- ${OPT}"
+    usage
+    die
+  fi
+}
+
+usage() {
+  echo
+  echo "Template script."
+  echo
+  to_stdout "${bld}Usage:${nc}"
+  to_stdout "    ${dim}\$${nc} ${script_name}"
+  echo
+  to_stdout "${bld}Options:${nc}"
+  cat <<EOF | column -tds '|'
+    -e, --error|Exit with error
+    -o, --option|Some option
+    -d, --debug|Enable debug output
+    -h, --help|Show this help message
+EOF
+}
+
+main() {
+  while getopts 'hdeo:-:' OPT; do
+    # support long options: https://stackoverflow.com/a/28466267/519360
+    if test "$OPT" = "-"; then # long option: reformulate OPT and OPTARG
+      OPT="${OPTARG%%=*}" # extract long option name
+      # shellcheck disable=SC2295
+      OPTARG="${OPTARG#$OPT}" # extract long option argument (may be empty)
+      OPTARG="${OPTARG#=}" # if long option argument, remove assigning `=`
+    fi
+
+    # Handle flags
+    case "$OPT" in
+      e | error )
+        die "exited with error"
+        ;;
+      o | option )
+        needs_arg
+        OPTION="${OPTARG}"
+        ;;
+      d | debug )
+        debug=true
+        ;;
+      h | help )
+        usage
+        exit 0
+        ;;
+      ??* ) # bad long option
+        >&2 echo "${0}: illegal option -- $OPT"
+        usage
+        die
+        ;;
+      ? ) # bad short option (error reported via getopts)
+        usage
+        die
+        ;;
+    esac
+  done
+
+  debug "Start of main"
+  echo "This is a template."
+
+  if [ -n "${OPTION}" ]; then
+    debug "Option is not empty"
+    echo "Option is set to: ${OPTION}"
+  fi
+}
+
+main "$@"

scripts/install-system/flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1753749649,
+        "narHash": "sha256-+jkEZxs7bfOKfBIk430K+tK9IvXlwzqQQnppC2ZKFj4=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "1f08a4df998e21f4e8be8fb6fbf61d11a1a5076a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

scripts/install-system/flake.nix

@@ -0,0 +1,29 @@
+{
+  description = "install-system package and shell environment";
+
+  inputs = {
+    nixpkgs.url  = "github:nixos/nixpkgs/nixos-25.05";
+  };
+
+  outputs = { self, nixpkgs, ... }: let
+    pkgs = nixpkgs.legacyPackages.x86_64-linux.pkgs;
+    name = builtins.baseNameOf (builtins.toString ./.);
+    shellApplication = pkgs.writeShellApplication {
+      inherit name;
+
+      text = builtins.readFile ./${name}.sh;
+
+      runtimeInputs = with pkgs; [
+        coreutils
+        gnused
+        unixtools.column
+      ];
+    };
+  in {
+    packages.x86_64-linux.default = shellApplication;
+
+    devShells.x86_64-linux.default = pkgs.mkShell {
+      packages = [ shellApplication ];
+    };
+  };
+}

scripts/install-system/install-system.sh

@@ -0,0 +1,136 @@
+#!/usr/bin/env bash
+
+set -e # Exit on error
+set +u # Allow unset variables
+set -o pipefail # Enable pipefail
+
+script_name=$(basename "${0}")
+nc="\e[0m" # Unset styles
+bld="\e[1m" # Bold text
+dim="\e[2m" # Dim text
+red="\e[31m" # Red foreground
+green="\e[32m" # Green foreground
+yellow="\e[33m" # Yellow foreground
+blue="\e[34m" # Blue foreground
+
+to_stderr() {
+  >&2 echo -e "${*}"
+}
+
+to_stdout() {
+  echo -e "${*}"
+}
+
+error() {
+  to_stderr " ${red}×${nc} ${*}"
+}
+
+warn() {
+  to_stderr " ${yellow}⚠${nc} ${*}"
+}
+
+info() {
+  to_stdout " ${blue}i${nc} ${*}"
+}
+
+debug() {
+  if [ -n "${debug}" ]; then
+    to_stderr " ${dim}▶ ${*}${nc}"
+  fi
+}
+
+success() {
+  to_stdout " ${green}✓${nc} ${*}"
+}
+
+trace() {
+  to_stderr "Stacktrace:"
+
+  local i=1 line file func
+  while read -r line func file < <(caller ${i}); do
+    to_stderr "[${i}] ${file}:${line} ${func}(): $(sed -n "${line}p" "${file}")"
+    ((i++))
+  done
+}
+
+# shellcheck disable=SC2120
+die() {
+  if [ "${#}" -gt 0 ]; then
+    error "${*}"
+  fi
+
+  exit 1
+}
+
+needs_arg() {
+  if [ -z "${OPTARG}" ]; then
+    to_stderr "${0}: option requires an argument -- ${OPT}"
+    usage
+    die
+  fi
+}
+
+usage() {
+  to_stdout
+  to_stdout "NixOS installation helper script."
+  to_stdout
+  to_stdout "${bld}Usage:${nc}"
+  to_stdout "    ${dim}\$${nc} ${script_name}"
+  to_stdout
+  to_stdout "${bld}Options:${nc}"
+  cat <<EOF | column -tds '|'
+    -e, --error|Exit with error
+    -o, --option|Some option
+    -d, --debug|Enable debug output
+    -h, --help|Show this help message
+EOF
+}
+
+main() {
+  while getopts 'hdeo:-:' OPT; do
+    # support long options: https://stackoverflow.com/a/28466267/519360
+    if test "$OPT" = "-"; then # long option: reformulate OPT and OPTARG
+      OPT="${OPTARG%%=*}" # extract long option name
+      # shellcheck disable=SC2295
+      OPTARG="${OPTARG#$OPT}" # extract long option argument (may be empty)
+      OPTARG="${OPTARG#=}" # if long option argument, remove assigning `=`
+    fi
+
+    # Handle flags
+    case "$OPT" in
+      e | error )
+        die "exited with error"
+        ;;
+      o | option )
+        needs_arg
+        OPTION="${OPTARG}"
+        ;;
+      d | debug )
+        debug=true
+        ;;
+      h | help )
+        usage
+        exit 0
+        ;;
+      ??* ) # bad long option
+        >&2 echo "${0}: illegal option -- $OPT"
+        usage
+        die
+        ;;
+      ? ) # bad short option (error reported via getopts)
+        usage
+        die
+        ;;
+    esac
+  done
+
+  debug "Start of main"
+  info "This is a template."
+
+  if [ -n "${OPTION}" ]; then
+    debug "Option is not empty"
+    debug "Option is set to: ${OPTION}"
+  fi
+}
+
+main "${@}"