netsuke-build 0.1.0-beta2

//! Validation for command-list boundaries before Ninja rendering.

use super::NinjaGenError;
use super::ninja_gen_command_list::{
    CommandListEntry, CommandListEntryError, command_list_entry_error,
};
use crate::ast::{Recipe, StringOrList};

/// Reject recipes the generated shell cannot execute with stable semantics.
pub(super) fn validate_action_recipe(
    action: &crate::ir::Action,
    action_index: usize,
) -> Result<(), NinjaGenError> {
    if let Recipe::Command { command } = &action.recipe
        && command.is_empty_content()
    {
        return Err(NinjaGenError::EmptyCommandRecipe { action_index });
    }
    if let Recipe::Command {
        command: StringOrList::List(entries),
    } = &action.recipe
    {
        for (zero_based_entry_index, entry) in entries.iter().enumerate() {
            let entry_index = zero_based_entry_index + 1;
            match command_list_entry_error(CommandListEntry(entry)) {
                Some(CommandListEntryError::MultipleBackgroundJobs) => {
                    return Err(NinjaGenError::MultipleBackgroundJobs {
                        action_index,
                        entry_index,
                    });
                }
                Some(CommandListEntryError::UnsupportedExec) => {
                    return Err(NinjaGenError::UnsupportedCommandListExec {
                        action_index,
                        entry_index,
                    });
                }
                Some(CommandListEntryError::UnanalyzableEval) => {
                    return Err(NinjaGenError::UnanalyzableCommandListEval {
                        action_index,
                        entry_index,
                    });
                }
                Some(CommandListEntryError::NinjaControlCharacter) => {
                    return Err(NinjaGenError::NinjaControlCharacter {
                        action_index,
                        entry_index,
                    });
                }
                None => {}
            }
        }
    }
    Ok(())
}