refact(rustup): add run_external_command

crates/pacdef_core/src/backend/actual/rustup.rs

@@ -1,7 +1,8 @@
 use crate::backend::backend_trait::{Backend, Switches, Text};
 use crate::backend::macros::impl_backend_constants;
+use crate::cmd::run_external_command;
 use crate::{Group, Package};
-use anyhow::{bail, ensure, Context, Result};
+use anyhow::{bail, Context, Result};
 use std::collections::HashSet;
 use std::os::unix::process::ExitStatusExt;
 use std::process::{Command, ExitStatus};
@@ -198,12 +199,7 @@ impl Backend for Rustup {
                 removed_toolchains.push(name);
             }
 
-            // TODO this should be abstracted
+            run_external_command(cmd)?;
-            let exit_status = cmd.status().with_context(|| "running command [{cmd:?}]")?;
-            ensure!(
-                exit_status.success(),
-                "command returned non-zero exit status"
-            );
         }
 
         for component in components {

crates/pacdef_core/src/cmd.rs

@@ -1,7 +1,7 @@
 use std::path::Path;
 use std::process::{Command, ExitStatus};
 
-use anyhow::{anyhow, Context, Result};
+use anyhow::{anyhow, ensure, Context, Result};
 
 use crate::env::get_editor;
 
@@ -21,9 +21,26 @@ where
         for f in files {
             cmd.arg(f.to_string_lossy().to_string());
         }
+        // TODO this could also use the run_external_command function
         cmd.status().map_err(|e| anyhow!(e))
     }
 
     let files: Vec<_> = files.iter().map(|p| p.as_ref()).collect();
     inner(&files)
 }
+
+/// Run an external command. Use the anyhow framework to bubble up errors if they occur.
+///
+/// # Errors
+///
+/// This function will return an error if the command cannot be run or if it returns a non-zero
+/// exit status. In case of an error the full command will be part of the error message.
+pub fn run_external_command(mut cmd: Command) -> Result<()> {
+    let exit_status = cmd.status().with_context(|| "running command [{cmd:?}]")?;
+    let success = exit_status.success();
+    ensure!(
+        success,
+        "command [{cmd:?}] returned non-zero exit status {success}"
+    );
+    Ok(())
+}