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//! Processing logic for package command function bodies.
//! Supports the full Rex DSL used by rez package commands.
use super::PythonAstParser;
use super::types::PackageData;
use rez_next_common::RezCoreError;
use rustpython_ast::{Expr, Stmt};
impl PythonAstParser {
/// Process the `commands` function body
pub(super) fn process_commands_function(
&mut self,
body: &[Stmt],
package_data: &mut PackageData,
) -> Result<(), RezCoreError> {
package_data.commands_function = self.process_command_function_body(body)?;
Ok(())
}
/// Process the `pre_commands` function body
pub(super) fn process_pre_commands_function(
&mut self,
body: &[Stmt],
package_data: &mut PackageData,
) -> Result<(), RezCoreError> {
package_data.pre_commands = self.process_command_function_body(body)?;
Ok(())
}
/// Process the `post_commands` function body
pub(super) fn process_post_commands_function(
&mut self,
body: &[Stmt],
package_data: &mut PackageData,
) -> Result<(), RezCoreError> {
package_data.post_commands = self.process_command_function_body(body)?;
Ok(())
}
/// Process the `pre_test_commands` function body.
pub(super) fn process_pre_test_commands_function(
&mut self,
body: &[Stmt],
package_data: &mut PackageData,
) -> Result<(), RezCoreError> {
package_data.pre_test_commands = self.process_command_function_body(body)?;
Ok(())
}
fn process_command_function_body(
&mut self,
body: &[Stmt],
) -> Result<Option<String>, RezCoreError> {
let outer_variables = self.context.variables.clone();
let result = (|| {
let mut commands = Vec::new();
for stmt in body {
if let Some(command) = self.extract_command_from_statement(stmt)? {
commands.push(command);
}
}
Ok((!commands.is_empty()).then(|| commands.join("\n")))
})();
self.context.variables = outer_variables;
result
}
/// Extract a Rex DSL command string from a single statement.
///
/// Supports:
/// - `env.VAR = "value"` (attribute assignment shorthand)
/// - `env.setenv / prepend_path / append_path / unsetenv / setenv_if_empty`
/// - `env.VAR.prepend / env.VAR.append / env.VAR.set / env.VAR.unset`
/// - Top-level: `alias`, `command`, `source`, `info`, `error`, `stop`, `resetenv`
/// - Top-level shorthand: `setenv`, `prependenv`, `appendenv`, `unsetenv`
pub(super) fn extract_command_from_statement(
&mut self,
stmt: &Stmt,
) -> Result<Option<String>, RezCoreError> {
match stmt {
Stmt::If(if_stmt) => {
let statements = match self.evaluate_expression(&if_stmt.test)? {
super::types::PythonValue::Boolean(true) => &if_stmt.body,
super::types::PythonValue::Boolean(false) => &if_stmt.orelse,
_ => {
return Err(RezCoreError::PackageParse(
"Command condition is not statically boolean".to_string(),
));
}
};
let mut commands = Vec::new();
for statement in statements {
if let Some(command) = self.extract_command_from_statement(statement)? {
commands.push(command);
}
}
if !commands.is_empty() {
return Ok(Some(commands.join("\n")));
}
}
// Handle `env.VAR = "value"` (attribute assignment shorthand)
Stmt::Assign(assign) => {
if let Some(Expr::Name(name)) = assign.targets.first() {
let value = self.evaluate_expression(&assign.value)?;
self.context.variables.insert(name.id.to_string(), value);
return Ok(None);
}
if let Some(Expr::Attribute(attr)) = assign.targets.first()
&& let Expr::Name(name_expr) = &*attr.value
&& name_expr.id.as_str() == "env"
{
let var_name = attr.attr.as_str();
if let Ok(value) = self.extract_string_value(&assign.value) {
return Ok(Some(format!("env.setenv('{}', '{}')", var_name, value)));
}
}
}
// Handle function calls: env.method(...) and top-level Rex calls
Stmt::Expr(expr_stmt) => {
if let Expr::Call(call) = &*expr_stmt.value {
if let Expr::Attribute(attr) = &*call.func {
// ─── env.method('VAR', ...) ───────────────────────────
if let Expr::Name(obj) = &*attr.value
&& obj.id.as_str() == "env"
{
let method = attr.attr.as_str();
match method {
"setenv" if call.args.len() >= 2 => {
if let (Ok(k), Ok(v)) = (
self.extract_string_value(&call.args[0]),
self.extract_string_value(&call.args[1]),
) {
return Ok(Some(format!("env.setenv('{}', '{}')", k, v)));
}
}
"unsetenv" => {
if let Some(arg) = call.args.first()
&& let Ok(k) = self.extract_string_value(arg)
{
return Ok(Some(format!("env.unsetenv('{}')", k)));
}
}
"prepend_path" if call.args.len() >= 2 => {
if let (Ok(k), Ok(v)) = (
self.extract_string_value(&call.args[0]),
self.extract_string_value(&call.args[1]),
) {
return Ok(Some(format!(
"env.prepend_path('{}', '{}')",
k, v
)));
}
}
"append_path" if call.args.len() >= 2 => {
if let (Ok(k), Ok(v)) = (
self.extract_string_value(&call.args[0]),
self.extract_string_value(&call.args[1]),
) {
return Ok(Some(format!(
"env.append_path('{}', '{}')",
k, v
)));
}
}
"setenv_if_empty" if call.args.len() >= 2 => {
if let (Ok(k), Ok(v)) = (
self.extract_string_value(&call.args[0]),
self.extract_string_value(&call.args[1]),
) {
return Ok(Some(format!(
"env.setenv_if_empty('{}', '{}')",
k, v
)));
}
}
_ => {}
}
}
// ─── env.VAR.prepend / env.VAR.append ─────────────────
if let Expr::Attribute(env_attr) = &*attr.value
&& let Expr::Name(obj) = &*env_attr.value
&& obj.id.as_str() == "env"
{
let var_name = env_attr.attr.as_str();
let method = attr.attr.as_str();
if let Some(arg) = call.args.first()
&& let Ok(value) = self.extract_string_value(arg)
{
match method {
"prepend" => {
return Ok(Some(format!(
"env.prepend_path('{}', '{}')",
var_name, value
)));
}
"append" => {
return Ok(Some(format!(
"env.append_path('{}', '{}')",
var_name, value
)));
}
"set" => {
return Ok(Some(format!(
"env.setenv('{}', '{}')",
var_name, value
)));
}
"unset" => {
return Ok(Some(format!("env.unsetenv('{}')", var_name)));
}
_ => {}
}
}
}
}
// ─── Top-level Rex calls ──────────────────────────────────
if let Expr::Name(func_name) = &*call.func {
match func_name.id.as_str() {
"alias" if call.args.len() >= 2 => {
if let (Ok(name), Ok(cmd)) = (
self.extract_string_value(&call.args[0]),
self.extract_string_value(&call.args[1]),
) {
return Ok(Some(format!("alias('{}', '{}')", name, cmd)));
}
}
"command" => {
if let Some(arg) = call.args.first()
&& let Ok(cmd) = self.extract_string_value(arg)
{
return Ok(Some(format!("command('{}')", cmd)));
}
}
"source" => {
if let Some(arg) = call.args.first()
&& let Ok(path) = self.extract_string_value(arg)
{
return Ok(Some(format!("source('{}')", path)));
}
}
"info" => {
if let Some(arg) = call.args.first()
&& let Ok(msg) = self.extract_string_value(arg)
{
return Ok(Some(format!("info('{}')", msg)));
}
}
"error" => {
if let Some(arg) = call.args.first()
&& let Ok(msg) = self.extract_string_value(arg)
{
return Ok(Some(format!("error('{}')", msg)));
}
}
"stop" => {
if call.args.is_empty() {
return Ok(Some("stop()".to_string()));
} else if let Ok(msg) = self.extract_string_value(&call.args[0]) {
return Ok(Some(format!("stop('{}')", msg)));
}
}
"resetenv" => {
if let Some(arg) = call.args.first()
&& let Ok(var) = self.extract_string_value(arg)
{
return Ok(Some(format!("resetenv('{}')", var)));
}
}
"setenv" if call.args.len() >= 2 => {
if let (Ok(k), Ok(v)) = (
self.extract_string_value(&call.args[0]),
self.extract_string_value(&call.args[1]),
) {
return Ok(Some(format!("setenv('{}', '{}')", k, v)));
}
}
"prependenv" if call.args.len() >= 2 => {
if let (Ok(k), Ok(v)) = (
self.extract_string_value(&call.args[0]),
self.extract_string_value(&call.args[1]),
) {
return Ok(Some(format!("prependenv('{}', '{}')", k, v)));
}
}
"appendenv" if call.args.len() >= 2 => {
if let (Ok(k), Ok(v)) = (
self.extract_string_value(&call.args[0]),
self.extract_string_value(&call.args[1]),
) {
return Ok(Some(format!("appendenv('{}', '{}')", k, v)));
}
}
"unsetenv" => {
if let Some(arg) = call.args.first()
&& let Ok(k) = self.extract_string_value(arg)
{
return Ok(Some(format!("unsetenv('{}')", k)));
}
}
_ => {}
}
}
return Err(RezCoreError::PackageParse(format!(
"Unsupported command statement: {call:?}"
)));
}
}
Stmt::Import(_) | Stmt::ImportFrom(_) | Stmt::Pass(_) => {}
_ => {
return Err(RezCoreError::PackageParse(format!(
"Unsupported command statement: {stmt:?}"
)));
}
}
Ok(None)
}
}