add lingo clean

src/backends/mod.rs

@@ -11,7 +11,7 @@ use crate::package::{
     OUTPUT_DIRECTORY,
 };
 use crate::util::errors::{AnyError, BuildResult, LingoError};
-use crate::{GitCloneAndCheckoutCap, WhichCapability};
+use crate::{GitCloneAndCheckoutCap, RemoveFolderCap, WhichCapability};
 
 pub mod cmake_c;
 pub mod cmake_cpp;
@@ -25,6 +25,7 @@ pub fn execute_command<'a>(
     config: &'a mut Config,
     which: WhichCapability,
     clone: GitCloneAndCheckoutCap,
+    remove_dir_all: RemoveFolderCap,
 ) -> BatchBuildResults<'a> {
     let mut result = BatchBuildResults::new();
     let dependencies = Vec::from_iter(config.dependencies.clone());
@@ -54,6 +55,12 @@ pub fn execute_command<'a>(
                 }
             }
         }
+        CommandSpec::Clean => {
+            let output_root = &config.apps[0].output_root;
+            if let Err(e) = remove_dir_all(&output_root.display().to_string()) {
+                error!("lingo was unable to delete build folder! {e}");
+            }
+        }
         _ => {}
     }
 

src/lib.rs

@@ -18,6 +18,9 @@ pub enum WhichError {
 #[derive(Debug)]
 pub struct GitCloneError(pub String); // TODO: create a more domain-specific error time like the actual git2::Error
 
+#[derive(Debug)]
+pub struct RemoveFolderError(pub String);
+
 impl std::fmt::Display for WhichError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
@@ -36,10 +39,18 @@ impl std::fmt::Display for GitCloneError {
     }
 }
 
+impl std::fmt::Display for RemoveFolderError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
 impl std::error::Error for WhichError {}
 
 impl std::error::Error for GitCloneError {}
 
+impl std::error::Error for RemoveFolderError {}
+
 pub struct GitUrl<'a>(&'a str);
 
 impl<'a> From<&'a str> for GitUrl<'a> {
@@ -61,3 +72,4 @@ pub type FsReadCapability<'a> = Box<dyn Fn(&std::path::Path) -> io::Result<Strin
 pub type GitCloneAndCheckoutCap<'a> = Box<
     dyn Fn(GitUrl, &std::path::Path, Option<GitLock>) -> Result<Option<String>, GitCloneError> + 'a,
 >;
+pub type RemoveFolderCap<'a> = Box<dyn Fn(&str) -> Result<(), RemoveFolderError> + 'a>;

src/main.rs

@@ -2,7 +2,7 @@ use liblingo::args::TargetLanguage;
 use std::io::ErrorKind;
 use std::path::{Path, PathBuf};
 use std::process::Command;
-use std::{env, io};
+use std::{env, fs, io};
 
 use clap::Parser;
 use git2::BranchType::{Local, Remote};
@@ -13,7 +13,9 @@ use liblingo::backends::{BatchBuildResults, BuildCommandOptions, CommandSpec};
 use liblingo::package::tree::GitLock;
 use liblingo::package::{Config, ConfigFile};
 use liblingo::util::errors::{BuildResult, LingoError};
-use liblingo::{GitCloneAndCheckoutCap, GitCloneError, GitUrl, WhichCapability, WhichError};
+use liblingo::{
+    GitCloneAndCheckoutCap, GitCloneError, GitUrl, RemoveFolderError, WhichCapability, WhichError,
+};
 
 fn do_which(cmd: &str) -> Result<PathBuf, WhichError> {
     which::which(cmd).map_err(|err| match err {
@@ -87,6 +89,11 @@ fn do_clone_and_checkout(
     Ok(git_rev)
 }
 
+fn do_remove_folder(path: &str) -> Result<(), RemoveFolderError> {
+    fs::remove_dir_all(path)
+        .map_err(|_| RemoveFolderError(format!("Could not delete folder: {}", path)))
+}
+
 fn do_read_to_string(p: &Path) -> io::Result<String> {
     std::fs::read_to_string(p)
 }
@@ -223,6 +230,7 @@ fn run_command(task: CommandSpec, config: &mut Config, _fail_at_end: bool) -> Ba
         config,
         Box::new(do_which),
         Box::new(do_clone_and_checkout),
+        Box::new(do_remove_folder),
     )
 }