Use duncet to fix path issues (#4137)

Cargo.toml

@@ -39,6 +39,7 @@ generic-simd = ["rustfmt_lib/generic-simd"]
 
 [dependencies]
 anyhow = "1.0"
+dunce = "1.0"
 env_logger = "0.7"
 log = "0.4"
 structopt = "0.3"

rustfmt-core/rustfmt-bin/Cargo.toml

@@ -31,6 +31,7 @@ generic-simd = ["rustfmt_lib/generic-simd"]
 ansi_term = "0.12"
 anyhow = "1.0"
 cargo_metadata = "0.9"
+dunce = "1.0"
 env_logger = "0.7"
 getopts = "0.2"
 log = "0.4"

rustfmt-core/rustfmt-bin/src/bin/main.rs

@@ -14,7 +14,7 @@ use structopt::StructOpt;
 use thiserror::Error;
 
 use rustfmt_lib::{
-    absolute_path, load_config, CliOptions, Config, Edition, EmitMode, FileLines, FileName,
+    load_config, CliOptions, Config, Edition, EmitMode, FileLines, FileName,
     FormatReportFormatterBuilder, Input, Session, Verbosity,
 };
 
@@ -252,7 +252,7 @@ enum OptError {
 impl Opt {
     fn canonicalize(&mut self) {
         for f in &mut self.files {
-            if let Ok(canonical_path) = absolute_path(&f) {
+            if let Ok(canonical_path) = dunce::canonicalize(&f) {
                 *f = canonical_path;
             }
         }

rustfmt-core/rustfmt-bin/src/cargo-fmt/main.rs

@@ -13,7 +13,6 @@ use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::str;
 
-use rustfmt_lib::absolute_path;
 use structopt::StructOpt;
 
 #[derive(StructOpt, Debug)]
@@ -289,7 +288,7 @@ impl Target {
         nested_int_test_files: Option<Vec<PathBuf>>,
     ) -> Self {
         let path = PathBuf::from(&target.src_path);
-        let canonicalized = absolute_path(&path).unwrap_or(path);
+        let canonicalized = dunce::canonicalize(&path).unwrap_or(path);
         let test_files = nested_int_test_files.unwrap_or_else(Vec::new);
 
         Self {
@@ -389,14 +388,14 @@ fn get_targets_root_only(
     include_nested_test_files: bool,
 ) -> Result<(), io::Error> {
     let metadata = get_cargo_metadata(manifest_path, false)?;
-    let workspace_root_path = absolute_path(PathBuf::from(&metadata.workspace_root))?;
+    let workspace_root_path = dunce::canonicalize(PathBuf::from(&metadata.workspace_root))?;
     let (in_workspace_root, current_dir_manifest) = if let Some(target_manifest) = manifest_path {
         (
-            workspace_root_path == target_manifest,
-            absolute_path(target_manifest)?,
+            workspace_root_path.as_path() == target_manifest,
+            dunce::canonicalize(target_manifest)?,
         )
     } else {
-        let current_dir = absolute_path(env::current_dir()?)?;
+        let current_dir = dunce::canonicalize(env::current_dir()?)?;
         (
             workspace_root_path == current_dir,
             current_dir.join("Cargo.toml"),
@@ -414,7 +413,7 @@ fn get_targets_root_only(
                 .into_iter()
                 .filter(|p| {
                     in_workspace_root
-                        || absolute_path(PathBuf::from(&p.manifest_path)).unwrap_or_default()
+                        || dunce::canonicalize(PathBuf::from(&p.manifest_path)).unwrap_or_default()
                             == current_dir_manifest
                 })
                 .map(|p| p.targets)
@@ -1051,7 +1050,7 @@ mod cargo_fmt_tests {
             edition: &str,
         ) -> Target {
             let path = PathBuf::from(src_path);
-            let canonicalized = absolute_path(&path).unwrap_or(path);
+            let canonicalized = dunce::canonicalize(&path).unwrap_or(path);
             Target {
                 path: canonicalized,
                 kind: String::from(kind),

rustfmt-core/rustfmt-lib/Cargo.toml

@@ -31,6 +31,7 @@ emitter = [
 annotate-snippets = { version = "0.6", features = ["ansi_term"] }
 anyhow = "1.0"
 bytecount = "0.6"
+dunce = "1.0"
 ignore = "0.4.11"
 itertools = "0.8"
 lazy_static = "1.0.0"

rustfmt-core/rustfmt-lib/src/config.rs

@@ -13,7 +13,6 @@ pub use crate::config::lists::*;
 pub use crate::config::options::*;
 
 use crate::config::config_type::ConfigType;
-use crate::utils::absolute_path;
 
 #[macro_use]
 pub mod config_type;
@@ -238,7 +237,7 @@ impl Config {
                 dir.to_path_buf()
             };
 
-            current = absolute_path(current)?;
+            current = dunce::canonicalize(current)?;
 
             loop {
                 match get_toml_path(&current) {

rustfmt-core/rustfmt-lib/src/config/file_lines.rs

@@ -12,8 +12,6 @@ use thiserror::Error;
 
 use rustc_span::{self, SourceFile};
 
-use crate::utils::absolute_path;
-
 /// A range of lines in a file, inclusive of both ends.
 pub struct LineRange {
     pub file: Rc<SourceFile>,
@@ -297,7 +295,7 @@ impl<'a> iter::Iterator for Files<'a> {
 
 fn canonicalize_path_string(file: &FileName) -> std::io::Result<FileName> {
     match *file {
-        FileName::Real(ref path) => absolute_path(path).map(FileName::Real),
+        FileName::Real(ref path) => dunce::canonicalize(path).map(FileName::Real),
         _ => Ok(file.clone()),
     }
 }

rustfmt-core/rustfmt-lib/src/lib.rs

@@ -24,7 +24,6 @@ pub use crate::config::{
 };
 pub use crate::emitter::rustfmt_diff::{ModifiedChunk, ModifiedLines};
 pub use crate::format_report_formatter::{FormatReportFormatter, FormatReportFormatterBuilder};
-pub use crate::utils::absolute_path;
 
 use crate::comment::LineClasses;
 use crate::emitter::Emitter;

rustfmt-core/rustfmt-lib/src/utils.rs

@@ -1,6 +1,4 @@
 use std::borrow::Cow;
-use std::io;
-use std::path;
 
 use rustc_ast::ast::{
     self, Attribute, CrateSugar, MetaItem, MetaItemKind, NestedMetaItem, NodeId, Path, Visibility,
@@ -663,47 +661,6 @@ pub(crate) fn unicode_str_width(s: &str) -> usize {
     s.width()
 }
 
-#[cfg(windows)]
-pub fn absolute_path<P: AsRef<path::Path>>(p: P) -> io::Result<path::PathBuf> {
-    use std::ffi::OsString;
-    use std::iter::once;
-    use std::os::windows::ffi::{OsStrExt, OsStringExt};
-    use std::ptr::null_mut;
-    use winapi::um::errhandlingapi::GetLastError;
-    use winapi::um::fileapi::GetFullPathNameW;
-
-    // FIXME: This `MAX_PATH` may be valid only from Windows 10, version 1607.
-    // https://docs.microsoft.com/ja-jp/windows/desktop/FileIO/naming-a-file#paths
-    const MAX_PATH: usize = 32767;
-    let wide: Vec<u16> = p
-        .as_ref()
-        .as_os_str()
-        .encode_wide()
-        .chain(once(0))
-        .collect();
-    let mut buffer: Vec<u16> = vec![0; MAX_PATH];
-    unsafe {
-        let result = GetFullPathNameW(
-            wide.as_ptr(),
-            MAX_PATH as u32,
-            buffer.as_mut_ptr(),
-            null_mut(),
-        );
-        if result == 0 {
-            Err(io::Error::from_raw_os_error(GetLastError() as i32))
-        } else {
-            Ok(path::PathBuf::from(OsString::from_wide(
-                &buffer[..result as usize],
-            )))
-        }
-    }
-}
-
-#[cfg(not(windows))]
-pub fn absolute_path<P: AsRef<path::Path>>(p: P) -> io::Result<path::PathBuf> {
-    std::fs::canonicalize(p)
-}
-
 #[cfg(test)]
 mod test {
     use super::*;