Use indentation settings in dx fmt and vscode extension

Adds the ability to specify an indent string to public autofmt methods - either
a sequence of spaces or a tab character.

Get the indentation style and size from rustfmt for dx fmt, or from the editor
settings for the vscode extension.

Closes #1595

packages/cli/src/cli/autoformat.rs

@@ -1,3 +1,4 @@
+use dioxus_autofmt::{IndentOptions, IndentType};
 use futures::{stream::FuturesUnordered, StreamExt};
 use std::{fs, path::Path, process::exit};
 
@@ -35,7 +36,8 @@ impl Autoformat {
         }
 
         if let Some(raw) = self.raw {
-            if let Some(inner) = dioxus_autofmt::fmt_block(&raw, 0) {
+            let indent = indentation_for(".")?;
+            if let Some(inner) = dioxus_autofmt::fmt_block(&raw, 0, indent) {
                 println!("{}", inner);
             } else {
                 // exit process with error
@@ -46,17 +48,21 @@ impl Autoformat {
 
         // Format single file
         if let Some(file) = self.file {
-            let file_content = if file == "-" {
+            let file_content;
+            let indent;
+            if file == "-" {
+                indent = indentation_for(".")?;
                 let mut contents = String::new();
                 std::io::stdin().read_to_string(&mut contents)?;
-                Ok(contents)
+                file_content = Ok(contents);
             } else {
-                fs::read_to_string(&file)
+                indent = indentation_for(".")?;
+                file_content = fs::read_to_string(&file);
             };
 
             match file_content {
                 Ok(s) => {
-                    let edits = dioxus_autofmt::fmt_file(&s);
+                    let edits = dioxus_autofmt::fmt_file(&s, indent);
                     let out = dioxus_autofmt::apply_formats(&s, edits);
                     if file == "-" {
                         print!("{}", out);
@@ -93,6 +99,12 @@ async fn autoformat_project(check: bool) -> Result<()> {
     let mut files_to_format = vec![];
     collect_rs_files(&crate_config.crate_dir, &mut files_to_format);
 
+    if files_to_format.is_empty() {
+        return Ok(());
+    }
+
+    let indent = indentation_for(&files_to_format[0])?;
+
     let counts = files_to_format
         .into_iter()
         .filter(|file| {
@@ -104,10 +116,11 @@ async fn autoformat_project(check: bool) -> Result<()> {
         })
         .map(|path| async {
             let _path = path.clone();
+            let _indent = indent.clone();
             let res = tokio::spawn(async move {
                 let contents = tokio::fs::read_to_string(&path).await?;
 
-                let edits = dioxus_autofmt::fmt_file(&contents);
+                let edits = dioxus_autofmt::fmt_file(&contents, _indent.clone());
                 let len = edits.len();
 
                 if !edits.is_empty() {
@@ -151,6 +164,49 @@ async fn autoformat_project(check: bool) -> Result<()> {
     Ok(())
 }
 
+fn indentation_for(file_or_dir: impl AsRef<Path>) -> Result<IndentOptions> {
+    let out = std::process::Command::new("cargo")
+        .args(["fmt", "--", "--print-config", "current"])
+        .arg(file_or_dir.as_ref())
+        .stdout(std::process::Stdio::piped())
+        .stderr(std::process::Stdio::inherit())
+        .output()?;
+    if !out.status.success() {
+        return Err(Error::CargoError("cargo fmt failed".into()));
+    }
+
+    let config = String::from_utf8_lossy(&out.stdout);
+
+    let hard_tabs = config
+        .lines()
+        .find(|line| line.starts_with("hard_tabs "))
+        .and_then(|line| line.split_once('='))
+        .map(|(_, value)| value.trim() == "true")
+        .ok_or_else(|| {
+            Error::RuntimeError("Could not find hard_tabs option in rustfmt config".into())
+        })?;
+    let tab_spaces = config
+        .lines()
+        .find(|line| line.starts_with("tab_spaces "))
+        .and_then(|line| line.split_once('='))
+        .map(|(_, value)| value.trim().parse::<usize>())
+        .ok_or_else(|| {
+            Error::RuntimeError("Could not find tab_spaces option in rustfmt config".into())
+        })?
+        .map_err(|_| {
+            Error::RuntimeError("Could not parse tab_spaces option in rustfmt config".into())
+        })?;
+
+    Ok(IndentOptions::new(
+        if hard_tabs {
+            IndentType::Tabs
+        } else {
+            IndentType::Spaces
+        },
+        tab_spaces,
+    ))
+}
+
 fn collect_rs_files(folder: &Path, files: &mut Vec<PathBuf>) {
     let Ok(folder) = folder.read_dir() else {
         return;