Add search for nvim in PATH (#279)

* add search for nvim

* need suggestions for error message

Cargo.lock

@@ -129,6 +129,28 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
+[[package]]
+name = "backtrace"
+version = "0.3.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1e692897359247cc6bb902933361652380af0f1b7651ae5c5013407f30e109e"
+dependencies = [
+ "backtrace-sys",
+ "cfg-if",
+ "libc",
+ "rustc-demangle",
+]
+
+[[package]]
+name = "backtrace-sys"
+version = "0.1.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18fbebbe1c9d1f383a9cc7e8ccdb471b91c8d024ee9c2ca5b5346121fe8b4399"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "base64"
 version = "0.11.0"
@@ -652,6 +674,15 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "failure"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d32e9bd16cc02eae7db7ef620b392808b89f6a5e16bb3497d159c6b92a0f4f86"
+dependencies = [
+ "backtrace",
+]
+
 [[package]]
 name = "filetime"
 version = "0.2.9"
@@ -1309,6 +1340,7 @@ dependencies = [
  "skulpin",
  "tokio",
  "unicode-segmentation",
+ "which",
  "winapi 0.3.8",
  "winres",
 ]
@@ -1843,6 +1875,12 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "rustc-demangle"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c691c0e608126e00913e33f0ccf3727d5fc84573623b8d65b2df340b5201783"
+
 [[package]]
 name = "rustc-hash"
 version = "1.1.0"
@@ -2468,6 +2506,7 @@ version = "3.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d011071ae14a2f6671d0b74080ae0cd8ebf3a6f8c9589a2cd45f23126fe29724"
 dependencies = [
+ "failure",
  "libc",
 ]
 

Cargo.toml

@@ -30,6 +30,7 @@ flexi_logger = { version = "0.14.6", default-features = false }
 anyhow = "1.0.26"
 parking_lot="0.10.0"
 cfg-if = "0.1.10"
+which = "3.1"
 
 [dev-dependencies]
 mockall = "0.7.0"

src/bridge/mod.rs

@@ -65,10 +65,13 @@ fn platform_build_nvim_cmd(bin: &str) -> Command {
 }
 
 fn build_nvim_cmd() -> Command {
-    let key = "NEOVIM_BIN";
-    match std::env::var_os(key) {
-        Some(path) => platform_build_nvim_cmd(&path.to_string_lossy()),
-        None => platform_build_nvim_cmd("nvim"),
+    if let Some(path) = std::env::var_os("NEOVIM_BIN") {
+        platform_build_nvim_cmd(&path.to_string_lossy())
+    } else if let Ok(path) = which::which("nvim") {
+        platform_build_nvim_cmd(path.to_str().unwrap())
+    } else {
+        error!("nvim not found!");
+        std::process::exit(1);
     }
 }