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use std::path::{Path, PathBuf};
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use embed_nu::{Argument, CommandGroupConfig, Context, ValueIntoExpression};
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use std::fs;
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use crate::{distro::OSConfig, error::ScriptError, utils::CFG_PATH};
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#[derive(Clone)]
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pub struct ExecBuilder {
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task_config: embed_nu::Value,
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ctx: Context,
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}
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impl ExecBuilder {
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pub fn create(
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script: PathBuf,
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os_config: OSConfig,
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task_config: embed_nu::Value,
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) -> Result<Self, ScriptError> {
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let script_contents = Self::get_script_contents(&script)?;
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let mut ctx = Context::builder()
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.with_command_groups(CommandGroupConfig::default().all_groups(true))?
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.add_parent_env_vars()
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.add_var("TRM_CONFIG", os_config)?
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.add_script(script_contents)?
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.build()?;
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if !ctx.has_fn("main") {
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Err(ScriptError::MissingMain(script))
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} else {
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Ok(Self { ctx, task_config })
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}
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}
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#[tracing::instrument(level = "trace", skip_all)]
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pub fn exec(mut self) -> Result<(), ScriptError> {
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let pipeline = self.ctx.call_fn(
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"main",
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vec![Argument::Positional(self.task_config.into_expression())],
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)?;
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self.ctx.print_pipeline_stderr(pipeline)?;
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Ok(())
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}
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/// Returns if the script needs to be run inside the new root
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pub fn requires_chroot(&self) -> bool {
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self.ctx
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.get_var("run_in_chroot")
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.and_then(|v| v.as_bool().ok())
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.unwrap_or(false)
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}
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#[tracing::instrument(level = "trace", skip_all)]
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fn get_script_contents(path: &Path) -> Result<String, ScriptError> {
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let path = CFG_PATH.join(path);
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if path.exists() {
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fs::read_to_string(path).map_err(ScriptError::from)
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} else {
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Err(ScriptError::ScriptNotFound(path))
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}
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}
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}
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