feat: xclip fallback for linux with xsel #352 (#390)

closes #352

Cargo.lock

@@ -461,6 +461,7 @@ dependencies = [
  "textwrap 0.12.1",
  "tui",
  "unicode-width",
+ "which",
 ]
 
 [[package]]
@@ -1358,6 +1359,16 @@ version = "0.9.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
+[[package]]
+name = "which"
+version = "4.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87c14ef7e1b8b8ecfc75d5eca37949410046e66f15d185c01d70824f1f8111ef"
+dependencies = [
+ "libc",
+ "thiserror",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"

Cargo.toml

@@ -41,6 +41,9 @@ anyhow = "1.0.33"
 unicode-width = "0.1"
 textwrap = "0.12"
 
+[target.'cfg(target_os = "linux")'.dependencies]
+which = "4.0.2"
+
 [target.'cfg(not(windows))'.dependencies]
 pprof = { version = "0.3", features = ["flamegraph"], optional = true }
 

src/clipboard.rs

@@ -1,4 +1,5 @@
 use anyhow::Result;
+use std::ffi::OsStr;
 use std::io::Write;
 use std::process::{Command, Stdio};
 
@@ -27,10 +28,37 @@ fn execute_copy_command(command: Command, text: &str) -> Result<()> {
     Ok(())
 }
 
+fn gen_command(
+    path: impl AsRef<OsStr>,
+    xclip_syntax: bool,
+) -> Command {
+    let mut c = Command::new(path);
+    if xclip_syntax {
+        c.arg("-selection");
+        c.arg("clipboard");
+    } else {
+        c.arg("--clipboard");
+    }
+    c
+}
+
 #[cfg(target_os = "linux")]
 pub fn copy_string(string: &str) -> Result<()> {
-    let mut cmd = Command::new("xclip");
-    cmd.arg("-selection").arg("clipboard");
+    use std::path::PathBuf;
+    use which::which;
+    let (path, xclip_syntax) = which("xclip").ok().map_or_else(
+        || {
+            (
+                which("xsel")
+                    .ok()
+                    .unwrap_or_else(|| PathBuf::from("xsel")),
+                false,
+            )
+        },
+        |path| (path, true),
+    );
+
+    let cmd = gen_command(path, xclip_syntax);
     execute_copy_command(cmd, string)
 }