Fix preview: handle Windows NT UNC paths (\\?\C:\foo)

Cargo.lock

@@ -244,6 +244,12 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "dunce"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56ce8c6da7551ec6c462cbaf3bfbc75131ebbfa1c944aeaa9dab51ca1c5f0c3b"
+
 [[package]]
 name = "edit"
 version = "0.1.4"
@@ -455,6 +461,7 @@ dependencies = [
  "crossterm",
  "dns_common",
  "dns_common_derive",
+ "dunce",
  "edit",
  "etcetera",
  "lazy_static",

Cargo.toml

@@ -37,6 +37,9 @@ dns_common_derive = { version = "0.2.1" }
 dns_common = { version = "0.2.1", default-features = false, features = ["yaml", "json"] }
 unicode-width = "0.1.10"
 
+[target.'cfg(windows)'.dependencies]
+dunce = "1"
+
 [lib]
 name = "navi"
 path = "src/lib.rs"

src/common/fs.rs

@@ -78,6 +78,11 @@ fn follow_symlink(pathbuf: PathBuf) -> Result<PathBuf> {
 
 fn exe_pathbuf() -> Result<PathBuf> {
     let pathbuf = std::env::current_exe().context("Unable to acquire executable's path")?;
+
+    #[cfg(target_family = "windows")]
+    let pathbuf = dunce::canonicalize(pathbuf)?;
+
+    debug!(current_exe = ?pathbuf);
     follow_symlink(pathbuf)
 }