Add support for gpu-rent.vars and enhance git update functionality

- Updated .gitignore to include gpu-rent.vars.
- Modified env.example to introduce the UPDATE_GIT variable for controlling git updates during execution.
- Implemented Import-GpuRentVars function in gpu-rent.ps1 to load environment variables from gpu-rent.vars.
- Enhanced gpu-rent.sh to support loading variables from gpu-rent.vars and added logic for handling default and extra arguments.
- Updated CLI documentation to reflect the new gpu-rent.vars file and its usage in configuration.
- Improved bootstrap and provisioning logic to conditionally perform git updates based on the new configuration.

gpu-rent.sh

@@ -5,6 +5,37 @@ set -euo pipefail
 ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 cd "$ROOT"
 
+load_vars_file() {
+  local file="$1"
+  [[ -f "$file" ]] || return 0
+  while IFS= read -r line || [[ -n "$line" ]]; do
+    line="${line#"${line%%[![:space:]]*}"}"
+    line="${line%"${line##*[![:space:]]}"}"
+    [[ -z "$line" || "$line" == \#* ]] && continue
+    if [[ "$line" == [eE][xX][pP][oO][rR][tT][[:space:]]* ]]; then
+      line="${line#*[eE][xX][pP][oO][rR][tT]}"
+      line="${line#"${line%%[![:space:]]*}"}"
+    fi
+    [[ "$line" != *=* ]] && continue
+    local key="${line%%=*}"
+    local val="${line#*=}"
+    key="${key%"${key##*[![:space:]]}"}"
+    key="${key#"${key%%[![:space:]]*}"}"
+    val="${val#"${val%%[![:space:]]*}"}"
+    val="${val%"${val##*[![:space:]]}"}"
+    if [[ ${#val} -ge 2 ]]; then
+      local q="${val:0:1}"
+      if [[ ( "$q" == '"' || "$q" == "'" ) && "${val: -1}" == "$q" ]]; then
+        val="${val:1:${#val}-2}"
+      fi
+    fi
+    [[ -z "$key" ]] && continue
+    if [[ -z "${!key+x}" || -z "${!key}" ]]; then
+      export "$key=$val"
+    fi
+  done <"$file"
+}
+
 ok_py() {
   local exe="$1"
   shift || true
@@ -64,5 +95,21 @@ if [[ ! -f "$ROOT/extensions.yaml" && -f "$ROOT/extensions.example.yaml" ]]; the
   cp "$ROOT/extensions.example.yaml" "$ROOT/extensions.yaml"
   echo "gpu-rent: created extensions.yaml"
 fi
+if [[ ! -f "$ROOT/gpu-rent.vars" && -f "$ROOT/gpu-rent.vars.example" ]]; then
+  cp "$ROOT/gpu-rent.vars.example" "$ROOT/gpu-rent.vars"
+  echo "gpu-rent: created gpu-rent.vars"
+fi
 
-exec "$VENV_PY" -m gpu_rent "$@"
+load_vars_file "$ROOT/gpu-rent.vars"
+
+ARGS=("$@")
+if [[ ${#ARGS[@]} -eq 0 && -n "${GPU_RENT_DEFAULT_ARGS:-}" ]]; then
+  # shellcheck disable=SC2206
+  ARGS=(${GPU_RENT_DEFAULT_ARGS})
+fi
+if [[ -n "${GPU_RENT_EXTRA_ARGS:-}" ]]; then
+  # shellcheck disable=SC2206
+  ARGS+=(${GPU_RENT_EXTRA_ARGS})
+fi
+
+exec "$VENV_PY" -m gpu_rent "${ARGS[@]}"