Move install_cli function to a seperate crate

Add install cli button to welcome experience
Add toast pop ups for CLI installation status

crates/install_cli/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "install_cli"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[lib]
+path = "src/install_cli.rs"
+
+[features]
+test-support = []
+
+[dependencies]
+smol = "1.2.5"
+anyhow = "1.0.38"
+log = "0.4"
+gpui = { path = "../gpui" }
+util = { path = "../util" }

crates/install_cli/src/install_cli.rs

@@ -0,0 +1,56 @@
+use std::path::Path;
+
+use anyhow::{Result, anyhow};
+use gpui::{AsyncAppContext, actions};
+use util::ResultExt;
+
+actions!(cli, [ Install ]);
+
+
+pub async fn install_cli(cx: &AsyncAppContext) -> Result<()> {
+    let cli_path = cx.platform().path_for_auxiliary_executable("cli")?;
+    let link_path = Path::new("/usr/local/bin/zed");
+    let bin_dir_path = link_path.parent().unwrap();
+
+    // Don't re-create symlink if it points to the same CLI binary.
+    if smol::fs::read_link(link_path).await.ok().as_ref() == Some(&cli_path) {
+        return Ok(());
+    }
+
+    // If the symlink is not there or is outdated, first try replacing it
+    // without escalating.
+    smol::fs::remove_file(link_path).await.log_err();
+    if smol::fs::unix::symlink(&cli_path, link_path)
+        .await
+        .log_err()
+        .is_some()
+    {
+        return Ok(());
+    }
+
+    // The symlink could not be created, so use osascript with admin privileges
+    // to create it.
+    let status = smol::process::Command::new("osascript")
+        .args([
+            "-e",
+            &format!(
+                "do shell script \" \
+                    mkdir -p \'{}\' && \
+                    ln -sf \'{}\' \'{}\' \
+                \" with administrator privileges",
+                bin_dir_path.to_string_lossy(),
+                cli_path.to_string_lossy(),
+                link_path.to_string_lossy(),
+            ),
+        ])
+        .stdout(smol::process::Stdio::inherit())
+        .stderr(smol::process::Stdio::inherit())
+        .output()
+        .await?
+        .status;
+    if status.success() {
+        Ok(())
+    } else {
+        Err(anyhow!("error running osascript"))
+    }
+}