Fix local path and templating issues (#436)

desktop/src-tauri/process/src/parser.rs

@@ -1,4 +1,6 @@
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
+
+use log::info;
 
 use crate::error::ProcessError;
 
@@ -38,6 +40,41 @@ impl ParsedCommand {
             .to_string();
     }
 
+    pub fn make_command_absolute_if_local(&mut self, base: &Path) {
+        let candidate = base.join(&self.command);
+        if candidate.is_file() {
+            info!(
+                "resolved local command '{}' to absolute path '{}'",
+                self.command,
+                candidate.display()
+            );
+            self.command = candidate.to_string_lossy().to_string();
+        } else {
+            info!(
+                "command '{}' is not a local file in '{}', leaving as-is for PATH resolution",
+                self.command,
+                base.display()
+            );
+        }
+    }
+
+    pub fn ensure_executable(&self) -> Result<(), ProcessError> {
+        #[cfg(unix)]
+        {
+            use std::os::unix::fs::PermissionsExt;
+
+            if let Ok(metadata) = std::fs::metadata(&self.command) {
+                let is_executable =
+                    metadata.is_file() && metadata.permissions().mode() & 0o111 != 0;
+                if !is_executable {
+                    return Err(ProcessError::NotExecutable(self.command.clone()));
+                }
+            }
+        }
+
+        Ok(())
+    }
+
     pub fn reconstruct(self) -> String {
         let mut v = vec![];
         v.extend(self.env);