fix(process): Don't kill the host process. (#19)

* fix(process): Don't kill the host process.

Ref: tauri-apps/tauri#7637

* clippy

.changes/skip-host-process.md

@@ -0,0 +1,6 @@
+---
+"nsis_tauri_utils": "patch"
+"nsis_process": "patch"
+---
+
+Skip processes with the same pid as the current installer's process to prevent the installer from killing itself.

crates/nsis-process/src/lib.rs

@@ -13,7 +13,7 @@ use windows_sys::Win32::{
     },
 };
 
-/// Test if there is a running process with the given name. The input and process names are case-insensitive.
+/// Test if there is a running process with the given name, skipping processes with the host's pid. The input and process names are case-insensitive.
 ///
 /// # Safety
 ///
@@ -36,7 +36,7 @@ pub unsafe extern "C" fn FindProcess(
     }
 }
 
-/// Kill all running process with the given name. The input and process names are case-insensitive.
+/// Kill all running process with the given name, skipping processes with the host's pid. The input and process names are case-insensitive.
 ///
 /// # Safety
 ///
@@ -71,6 +71,7 @@ fn kill(pid: u32) -> bool {
 }
 
 fn get_processes(name: &str) -> Vec<u32> {
+    let current_pid = std::process::id();
     let mut processes = Vec::new();
 
     unsafe {
@@ -83,11 +84,12 @@ fn get_processes(name: &str) -> Vec<u32> {
 
         if Process32FirstW(handle, &mut process) != 0 {
             while Process32NextW(handle, &mut process) != 0 {
-                if decode_wide(&process.szExeFile)
-                    .to_str()
-                    .unwrap_or_default()
-                    .to_lowercase()
-                    == name.to_lowercase()
+                if current_pid != process.th32ProcessID
+                    && decode_wide(&process.szExeFile)
+                        .to_str()
+                        .unwrap_or_default()
+                        .to_lowercase()
+                        == name.to_lowercase()
                 {
                     processes.push(process.th32ProcessID);
                 }