feat: ✨ added build artifact purging to cli

Author: arctic-hen7

packages/perseus-cli/src/bin/main.rs

@@ -1,5 +1,5 @@
 use perseus_cli::errors::*;
-use perseus_cli::{build, check_env, delete_bad_dir, help, prepare, serve, PERSEUS_VERSION};
+use perseus_cli::{build, check_env, delete_artifacts, delete_bad_dir, help, prepare, serve, PERSEUS_VERSION};
 use std::env;
 use std::io::Write;
 use std::path::PathBuf;
@@ -71,11 +71,15 @@ fn core(dir: PathBuf) -> Result<i32> {
             if prog_args[0] == "build" {
                 // Set up the '.perseus/' directory if needed
                 prepare(dir.clone())?;
+                // Delete old build artifacts
+                delete_artifacts(dir.clone())?;
                 let exit_code = build(dir, &prog_args)?;
                 Ok(exit_code)
             } else if prog_args[0] == "serve" {
                 // Set up the '.perseus/' directory if needed
                 prepare(dir.clone())?;
+                // Delete old build artifacts
+                delete_artifacts(dir.clone())?;
                 let exit_code = serve(dir, &prog_args)?;
                 Ok(exit_code)
             } else if prog_args[0] == "prep" {

packages/perseus-cli/src/errors.rs

@@ -42,7 +42,6 @@ error_chain! {
         RemoveBadDirFailed(target: Option<String>, err: String) {
             description("removing corrupted '.perseus/' directory failed")
             display("Couldn't remove '.perseus/' directory at '{:?}'. Please remove the '.perseus/' directory manually (particularly if you didn't intentionally run the 'clean' command, that means the directory has been corrupted). Error was: '{}'.", target, err)
-
         }
         /// For when executing a system command after preparation failed. This shouldn't cause a directory deletion.
         CmdExecFailed(cmd: String, err: String) {
@@ -69,6 +68,11 @@ error_chain! {
             description("port in PORT environment variable couldn't be parsed as number")
             display("Couldn't parse 'PORT' environment variable as a number, please check that you've provided the correct value. Error was: '{}'.", err)
         }
+        /// For when build artifacts either couldn't be removed or the directory couldn't be recreated.
+        RemoveArtifactsFailed(target: Option<String>, err: String) {
+            description("reconstituting build artifacts failed")
+            display("Couldn't remove and replace '.perseus/dist/static/' directory at '{:?}'. Please try again or run 'perseus clean' if the error persists. Error was: '{}'.", target, err)
+        }
     }
 }
 

packages/perseus-cli/src/lib.rs

@@ -47,7 +47,7 @@ pub use help::help;
 pub use prepare::{check_env, prepare};
 pub use serve::serve;
 
-/// Deletes a corrupted '.perseus/' directory. This qwill be called on certain error types that would leave the user with a half-finished
+/// Deletes a corrupted '.perseus/' directory. This will be called on certain error types that would leave the user with a half-finished
 /// product, which is better to delete for safety and sanity.
 pub fn delete_bad_dir(dir: PathBuf) -> Result<()> {
     let mut target = dir;
@@ -63,3 +63,27 @@ pub fn delete_bad_dir(dir: PathBuf) -> Result<()> {
     }
     Ok(())
 }
+
+/// Deletes build artifacts in `.perseus/dist/static` and replaces the directory.
+pub fn delete_artifacts(dir: PathBuf) -> Result<()> {
+    let mut target = dir;
+    target.extend([".perseus", "dist", "static"]);
+    // We'll only delete the directory if it exists, otherwise we're fine
+    if target.exists() {
+        if let Err(err) = fs::remove_dir_all(&target) {
+            bail!(ErrorKind::RemoveArtifactsFailed(
+                target.to_str().map(|s| s.to_string()),
+                err.to_string()
+            ))
+        }
+    }
+    // No matter what, it's gone now, so recreate it
+    if let Err(err) = fs::create_dir(&target) {
+        bail!(ErrorKind::RemoveArtifactsFailed(
+            target.to_str().map(|s| s.to_string()),
+            err.to_string()
+        ))
+    }
+
+    Ok(())
+}