fix(cli): ensure gradlew is executable and does not use CRLF

.changes/ensure-gradlew-unix.md

@@ -0,0 +1,6 @@
+---
+"tauri-cli": patch:bug
+"@tauri-apps/cli": patch:bug
+---
+
+Ensure gradlew is executable and does not use CRLF so it can be used on UNIX systems.

tooling/cli/src/mobile/mod.rs

@@ -10,7 +10,7 @@ use crate::{
   interface::{AppInterface, AppSettings, DevProcess, Interface, Options as InterfaceOptions},
   ConfigValue,
 };
-#[cfg(target_os = "macos")]
+#[cfg(unix)]
 use anyhow::Context;
 use anyhow::{bail, Result};
 use heck::ToSnekCase;
@@ -325,7 +325,10 @@ fn ensure_init(
       let java_folder = project_dir
         .join("app/src/main/java")
         .join(tauri_config_.identifier.replace('.', "/").replace('-', "_"));
-      if !java_folder.exists() {
+      if java_folder.exists() {
+        #[cfg(unix)]
+        ensure_gradlew(&project_dir)?;
+      } else {
         project_outdated_reasons
           .push("you have modified your \"identifier\" in the Tauri configuration");
       }
@@ -362,6 +365,31 @@ fn ensure_init(
   Ok(())
 }
 
+#[cfg(unix)]
+fn ensure_gradlew(project_dir: &std::path::Path) -> Result<()> {
+  use std::os::unix::fs::PermissionsExt;
+
+  let gradlew_path = project_dir.join("gradlew");
+  if let Ok(metadata) = gradlew_path.metadata() {
+    let mut permissions = metadata.permissions();
+    let is_executable = permissions.mode() & 0o111 != 0;
+    if !is_executable {
+      permissions.set_mode(permissions.mode() | 0o111);
+      std::fs::set_permissions(&gradlew_path, permissions)
+        .context("failed to mark gradlew as executable")?;
+    }
+    std::fs::write(
+      &gradlew_path,
+      std::fs::read_to_string(&gradlew_path)
+        .context("failed to read gradlew")?
+        .replace("\r\n", "\n"),
+    )
+    .context("failed to replace gradlew CRLF with LF")?;
+  }
+
+  Ok(())
+}
+
 fn log_finished(outputs: Vec<PathBuf>, kind: &str) {
   if !outputs.is_empty() {
     let mut printable_paths = String::new();