created var management lib, embryo removed from filefct lib

lib/vars.sh

@@ -0,0 +1,106 @@
+#!/bin/bash
+# ------------------------------------------------------------------------------
+# Variables substitution function
+# This file is part of the init.sh project
+# Copyright (c) 2019-2024 Geoffray Levasseur <fatalerrors@geoffray-levasseur.org>
+# ------------------------------------------------------------------------------
+# This file is distributed under 3-clause BSD license.
+# The complete license agreement can be obtained at:
+# https://opensource.org/licenses/BSD-3-Clause
+# ------------------------------------------------------------------------------
+
+
+# ------------------------------------------------------------------------------
+# Replace @VAR@ in a text file by the corresponding $VAR value
+# The --delimiter or -d option allow to use something else than @
+setvar() {
+    local delimiter="@"
+    local vars=()
+    local file
+
+    # Parse arguments
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            --delimiter|-d)
+                shift
+                delimiter="${1:-@}"
+                ;;
+            -*)
+                prnt E "setvar(): Unknown option: $1"
+                die 
+                ;;
+            *)
+                if [[ -f $1 && $# -eq 1 ]]; then
+                    file="$1"
+                else
+                    vars+=("$1")
+                fi
+                ;;
+        esac
+        shift
+    done
+
+    if [[ -z $file ]]; then
+        prnt E "Usage: setvar [--delimiter D] VAR1 [VAR2 ...] <file>"
+        die 1
+    fi
+    if [[ ${#vars[@]} -eq 0 ]]; then
+        prnt E "No variable name(s) provided."
+        die 1
+    fi
+
+    local var val escaped pattern
+    for var in "${vars[@]}"; do
+        val="${!var}"
+        if [[ -z $val ]]; then
+            prnt W "Variable '$var' is unset or empty; skipped."
+            continue
+        fi
+
+        # Échapper les caractères spéciaux pour sed
+        escaped=$(printf '%s' "$val" | sed -e 's/[\/&]/\\&/g')
+
+        pattern="${delimiter}${var}${delimiter}"
+
+        prnt I "Replacing $pattern with $val in $file"
+        sed -i -e "s|$pattern|$escaped|g" "$file"
+    done
+}
+export -f setvar
+# ------------------------------------------------------------------------------
+
+
+# ------------------------------------------------------------------------------
+# Replace @VAR@ in a text file by the corresponding values available in the
+# environment. The --delimiter or -d option allow to use something else than @
+setvars_from_env() {
+    local file delimiter="@"
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            -d|--delimiter)
+                shift
+                delimiter="${1:-@}"
+                ;;
+            *)
+                file="$1"
+                ;;
+        esac
+        shift
+    done
+
+    [[ -f $file ]] || {
+        prnt E "File not found: $file"
+        die 1
+    }
+
+    local vars
+    vars=$(grep -o "${delimiter}[A-Z0-9_]\+${delimiter}" "$file" | sort -u | tr -d "$delimiter")
+    [[ -z $vars ]] && return 0
+
+    setvar --delimiter "$delimiter" $vars "$file"
+}
+export -f setvars_from_env
+# ------------------------------------------------------------------------------
+
+
+# EOF