feat: fix minor bugs

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/cuddle/src/schema_validator/nickel.rs

@@ -0,0 +1,111 @@
+use std::{
+    env::temp_dir,
+    path::{Path, PathBuf},
+};
+
+use uuid::Uuid;
+
+use crate::{
+    plan::RawPlan,
+    project::{RawProject, CUDDLE_PROJECT_FILE},
+};
+
+pub trait NickelPlanExt {
+    fn schema_path(&self, schema: &Path) -> PathBuf;
+}
+
+impl NickelPlanExt for RawPlan {
+    fn schema_path(&self, schema: &Path) -> PathBuf {
+        self.root.join(schema)
+    }
+}
+
+pub trait NickelProjectExt {
+    fn project_path(&self) -> PathBuf;
+}
+
+impl NickelProjectExt for RawProject {
+    fn project_path(&self) -> PathBuf {
+        self.root.join(CUDDLE_PROJECT_FILE)
+    }
+}
+
+fn unique_contract_file() -> anyhow::Result<TempDirGuard> {
+    let p = temp_dir()
+        .join("cuddle")
+        .join("nickel-contracts")
+        .join(Uuid::new_v4().to_string());
+
+    std::fs::create_dir_all(&p)?;
+
+    let file = p.join("contract.ncl");
+
+    Ok(TempDirGuard { dir: p, file })
+}
+
+pub struct TempDirGuard {
+    dir: PathBuf,
+    file: PathBuf,
+}
+
+impl Drop for TempDirGuard {
+    fn drop(&mut self) {
+        if let Err(e) = std::fs::remove_dir_all(&self.dir) {
+            panic!("failed to remove tempdir: {}", e)
+        }
+    }
+}
+
+impl std::ops::Deref for TempDirGuard {
+    type Target = PathBuf;
+
+    fn deref(&self) -> &Self::Target {
+        &self.file
+    }
+}
+
+pub struct NickelSchemaValidator {}
+impl NickelSchemaValidator {
+    pub fn validate(plan: &RawPlan, project: &RawProject, nickel: &Path) -> anyhow::Result<()> {
+        let nickel_file = plan.schema_path(nickel);
+        let cuddle_file = project.project_path();
+
+        let nickel_file = format!(
+            r##"
+let {{ProjectSchema, ..}} = import "{}" in
+
+let Schema = {{
+  project | ProjectSchema, .. 
+}} in
+
+{{
+
+  config | Schema = import "{}" 
+}} 
+
+"##,
+            nickel_file.display(),
+            cuddle_file.display()
+        );
+
+        let contract_file = unique_contract_file()?;
+
+        std::fs::write(contract_file.as_path(), nickel_file)?;
+
+        let mut cmd = std::process::Command::new("nickel");
+
+        cmd.args(["export", &contract_file.display().to_string()]);
+
+        let output = cmd.output()?;
+
+        if !output.status.success() {
+            anyhow::bail!(
+                "failed to run nickel command: output: {} {}",
+                std::str::from_utf8(&output.stdout)?,
+                std::str::from_utf8(&output.stderr)?
+            )
+        }
+
+        Ok(())
+    }
+}