Big bang

generate-env.sh

@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+# generate-env.sh — Interactively generate a .env file from a .env.example template.
+# Run with -h for usage information.
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# shellcheck source=lib/colors.sh
+source "${SCRIPT_DIR}/lib/colors.sh"
+# shellcheck source=lib/parse.sh
+source "${SCRIPT_DIR}/lib/parse.sh"
+# shellcheck source=lib/validate.sh
+source "${SCRIPT_DIR}/lib/validate.sh"
+# shellcheck source=lib/prompt.sh
+source "${SCRIPT_DIR}/lib/prompt.sh"
+# shellcheck source=lib/output.sh
+source "${SCRIPT_DIR}/lib/output.sh"
+
+# ---------------------------------------------------------------------------
+# Defaults
+# ---------------------------------------------------------------------------
+INPUT_FILE=".env.example"
+OUTPUT_FILE=".env"
+
+# ---------------------------------------------------------------------------
+# Argument parsing
+# ---------------------------------------------------------------------------
+usage() {
+    cat "${SCRIPT_DIR}/HELP" >&2
+    exit 0
+}
+
+while getopts ":o:h" opt; do
+    case "$opt" in
+        o) OUTPUT_FILE="$OPTARG" ;;
+        h) usage ;;
+        :) printf "${RED}Error: option -%s requires an argument.${NC}\n" "$OPTARG" >&2; exit 1 ;;
+        \?) printf "${RED}Error: unknown option -%s${NC}\n" "$OPTARG" >&2; exit 1 ;;
+    esac
+done
+shift $((OPTIND - 1))
+
+if [[ $# -gt 0 ]]; then
+    INPUT_FILE="$1"
+fi
+
+# ---------------------------------------------------------------------------
+# Guard: don't silently overwrite an existing .env without confirmation
+# ---------------------------------------------------------------------------
+if [[ -f "$OUTPUT_FILE" ]]; then
+    printf "${YELLOW}Warning: %s already exists.${NC}\n" "$OUTPUT_FILE" >&2
+    read -r -p "Overwrite? [y/N]: " confirm >&2
+    case "${confirm,,}" in
+        y|yes) ;;
+        *) printf "Aborted.\n" >&2; exit 0 ;;
+    esac
+fi
+
+# ---------------------------------------------------------------------------
+# Main
+# ---------------------------------------------------------------------------
+printf "${BOLD}generate-env${NC}  %s → %s\n" "$INPUT_FILE" "$OUTPUT_FILE" >&2
+printf "${DIM}Fill in each variable. Press Enter to accept the default value.${NC}\n" >&2
+
+parse_env_example "$INPUT_FILE"
+
+if [[ ${#ENV_VARS[@]} -eq 0 ]]; then
+    printf "${YELLOW}No variables found in %s.${NC}\n" "$INPUT_FILE" >&2
+    exit 0
+fi
+
+printf "${DIM}Found %d variable(s).${NC}\n" "${#ENV_VARS[@]}" >&2
+
+prompt_all_variables
+
+write_env_file "$OUTPUT_FILE"