bootstrap help and version list

bootstrap.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-CBUILD_BOOTSTRAP_VERSION=1.0.0
+CBUILD_BOOTSTRAP_VERSION=1.0.1
 set -eo pipefail
 
 function version_parse {
@@ -29,29 +29,56 @@ function exec_script_line {
     eval "$line_str"
 }
 
+function print_version_list {
+    dir_local="$HOME/.local/share/cbuild"
+    dir_global="/usr/local/share/cbuild"
+    files=""
+    if [ -d "$dir_local" ]; then
+        files+="$(find $dir_local -name 'CBUILD_VERSION')"
+    fi
+    if [ -d "$dir_global" ]; then
+        files+="$(find $dir_global -name 'CBUILD_VERSION')"
+    fi
+    for f in $files; do
+        cat $f | sed '$a\'
+    done | sort -V
+}
+
+function print_help {
+    echo "cbuild-bootstrap v$CBUILD_BOOTSTRAP_VERSION"
+    echo "Script that launches a specific cbuild version selected by user or defined in a project config."
+    echo "Usage: cbuild [OPTIONS]"
+    echo "Options:"
+    echo "    -h, --help         Show this message"
+    echo "    -v, --version      Shows version"
+    echo "    -c, --config FILE  Set project config file path (default=./project.config)"
+    echo "    --list-versions    Shows list of installed cbuild versions"
+}
+
 # parse command line arguments
 project_config_path="./project.config"
 args=($@)
 args_count=${#args[@]}
 i=0
-
-function get_next_arg {
-    i=$((i+1))
-    safeprint "${args[i]}"
-}
-
+if [ $args_count -eq 0 ]; then
+    print_help
+fi
 while [ $i -lt $args_count ]
 do
     case "${args[i]}" in
         '-v' | '--version')
             echo "cbuild-bootstrap v$CBUILD_BOOTSTRAP_VERSION"
             ;;
-        '-c' | '--config')
-            project_config_path="$(get_next_arg)"
+        '-h' | '--help')
+            print_help
             ;;
-        '-n' | '--new-project')
-            echo "enter project cbuild version (example: 2.1.0)"
-            read -r CBUILD_VERSION
+        '-c' | '--config')
+            i=$((i+1))
+            project_config_path="${args[i]}"
+            ;;
+        '--list-versions')
+            print_version_list
+            exit 0
             ;;
         *)
             ;;
@@ -59,9 +86,21 @@ do
     i=$((i+1))
 done
 
-# read version from project config if not specified
 if [ -z "$CBUILD_VERSION" ]; then
-    exec_script_line "$project_config_path" 2
+    if [ -f "$project_config_path" ]; then
+        # read version from project config
+        exec_script_line "$project_config_path" 2
+    else
+        echo "project config not found"
+        echo "list of installed cbuild versions:"
+        versions=$(print_version_list)
+
+        echo "$versions"
+        latest_version=$(echo "$versions" | tail -n 1)
+        echo "select version (default=$latest_version):"
+        read -r CBUILD_VERSION
+        [ -z "$CBUILD_VERSION" ] && CBUILD_VERSION=$latest_version
+    fi
 fi
 
 version_parse "$CBUILD_VERSION"