Migrate browser opening logic to match Cargo

Cargo.toml

@@ -31,6 +31,7 @@ git-testament = "0.1.4"
 lazy_static = "1"
 libc = "0.2"
 markdown = "0.2"
+opener = "0.4.0"
 # Used by `curl` or `reqwest` backend although it isn't imported
 # by our rustup.
 openssl = { version = "0.10", optional = true }

src/errors.rs

@@ -25,6 +25,7 @@ error_chain! {
     foreign_links {
         Temp(temp::Error);
         Io(io::Error);
+        Open(opener::OpenError);
     }
 
     errors {

src/utils/raw.rs

@@ -353,74 +353,6 @@ pub fn find_cmd<'a>(cmds: &[&'a str]) -> Option<&'a str> {
     cmds.iter().cloned().find(|&s| has_cmd(s))
 }
 
-pub fn open_browser(path: &Path) -> io::Result<bool> {
-    #[cfg(not(windows))]
-    fn inner(path: &Path) -> io::Result<bool> {
-        use std::process::Stdio;
-
-        let env_browser = env::var_os("BROWSER").map(|b| env::split_paths(&b).collect::<Vec<_>>());
-        let env_commands: Vec<&str> = env_browser
-            .as_ref()
-            .map(|cmds| cmds.iter().by_ref().filter_map(|b| b.to_str()).collect())
-            .unwrap_or_default();
-
-        let commands = [
-            "xdg-open",
-            "open",
-            "firefox",
-            "chromium",
-            "sensible-browser",
-        ];
-        if let Some(cmd) = find_cmd(&env_commands).or_else(|| find_cmd(&commands)) {
-            Command::new(cmd)
-                .arg(path)
-                .stdin(Stdio::null())
-                .stdout(Stdio::null())
-                .stderr(Stdio::null())
-                .spawn()
-                .map(|_| true)
-        } else {
-            Ok(false)
-        }
-    }
-    #[cfg(windows)]
-    fn inner(path: &Path) -> io::Result<bool> {
-        use std::ptr;
-        use winapi::ctypes;
-        use winapi::shared::minwindef::HINSTANCE;
-        use winapi::shared::ntdef::LPCWSTR;
-        use winapi::shared::windef::HWND;
-
-        // FIXME: When winapi has this function, use their version
-        extern "system" {
-            pub fn ShellExecuteW(
-                hwnd: HWND,
-                lpOperation: LPCWSTR,
-                lpFile: LPCWSTR,
-                lpParameters: LPCWSTR,
-                lpDirectory: LPCWSTR,
-                nShowCmd: ctypes::c_int,
-            ) -> HINSTANCE;
-        }
-        const SW_SHOW: ctypes::c_int = 5;
-
-        let path = windows::to_u16s(path)?;
-        let operation = windows::to_u16s("open")?;
-        let result = unsafe {
-            ShellExecuteW(
-                ptr::null_mut(),
-                operation.as_ptr(),
-                path.as_ptr(),
-                ptr::null(),
-                ptr::null(),
-                SW_SHOW,
-            )
-        };
-        Ok(result as usize > 32)
-    }
-    inner(path)
-}
-
 #[cfg(windows)]
 pub mod windows {
     use std::ffi::OsStr;

src/utils/utils.rs

@@ -355,11 +355,7 @@ pub fn read_dir(name: &'static str, path: &Path) -> Result<fs::ReadDir> {
 }
 
 pub fn open_browser(path: &Path) -> Result<()> {
-    match raw::open_browser(path) {
-        Ok(true) => Ok(()),
-        Ok(false) => Err("no browser installed".into()),
-        Err(e) => Err(e).chain_err(|| "could not open browser"),
-    }
+    opener::open(path).chain_err(|| "couldn't open browser")
 }
 
 pub fn set_permissions(path: &Path, perms: fs::Permissions) -> Result<()> {