feat: improve CLI help and version output

Author: Mufanc

README.md

@@ -17,12 +17,20 @@ Place shared libraries (`.so`) or dex files (`.dex`) in `/data/adb/zynx/liteload
 
 ### Force Debuggable
 
+> Requires `--cfg-enable-debugger` to be enabled.
+
 Set the system property `debug.zynx.debuggable.<package_name>` to `1` to force-enable debugging for the specified app:
 
 ```shell
 setprop debug.zynx.debuggable.com.example.app 1
 ```
 
+### Zygisk (WIP)
+
+> Requires `--cfg-enable-zygisk` to be enabled.
+
+Enables Zygisk compatibility layer, allowing Zynx to load Zygisk modules.
+
 ## License
 
 MIT

src/core/build.rs

@@ -1,6 +1,7 @@
 use aya_build::{Package, Toolchain};
 use std::env;
 use std::error::Error;
+use std::process::Command;
 
 fn main() -> Result<(), Box<dyn Error>> {
     if env::var("PROFILE")? == "debug" {
@@ -25,5 +26,11 @@ fn main() -> Result<(), Box<dyn Error>> {
 
     prost_build::compile_protos(&proto_files, &[proto_src])?;
 
+    let output = Command::new("git").args(["rev-parse", "HEAD"]).output()?;
+    let commit_hash = String::from_utf8(output.stdout)?.trim().to_string();
+
+    println!("cargo:rustc-env=GIT_COMMIT_HASH={commit_hash}");
+    println!("cargo:rerun-if-changed={}/.git/HEAD", env!("ROOT_DIR"));
+
     Ok(())
 }

src/core/src/cli.rs

@@ -1,14 +1,23 @@
 use clap::Parser;
 
 #[derive(Parser)]
+#[command(about = "Zynx - an eBPF-based Android process injection framework", version, long_version = concat!(env!("CARGO_PKG_VERSION"), " (commit ", env!("GIT_COMMIT_HASH"), ")"))]
 pub struct Cli {
-    #[clap(long, help = "run zynx in daemon mode", conflicts_with = "configs")]
+    #[clap(
+        long,
+        help = "Run Zynx in daemon mode (usually used for KernelSU/Magisk module)",
+        conflicts_with = "configs"
+    )]
     pub daemon: bool,
 
-    #[clap(long, help = "disable debugger", group = "configs")]
-    pub cfg_disable_debugger: bool,
+    #[clap(
+        long,
+        help = "Enable debugger (allow force-debuggable for apps)",
+        group = "configs"
+    )]
+    pub cfg_enable_debugger: bool,
 
-    #[clap(long, help = "enable zygisk", group = "configs")]
+    #[clap(long, help = "Enable zygisk compat", group = "configs")]
     pub cfg_enable_zygisk: bool,
 }
 

src/core/src/config.rs

@@ -6,7 +6,7 @@ static INSTANCE: OnceLock<ZynxConfigs> = OnceLock::new();
 
 #[derive(Debug)]
 pub struct ZynxConfigs {
-    pub disable_debugger: bool,
+    pub enable_debugger: bool,
     pub enable_zygisk: bool,
 }
 
@@ -27,7 +27,7 @@ impl ZynxConfigs {
 
     fn from_cli(cli: &Cli) -> Self {
         Self {
-            disable_debugger: cli.cfg_disable_debugger,
+            enable_debugger: cli.cfg_enable_debugger,
             enable_zygisk: cli.cfg_enable_zygisk,
         }
     }

src/core/src/injector/app/policy/debugger.rs

@@ -16,7 +16,7 @@ impl PolicyProvider for DebuggerPolicyProvider {
     }
 
     async fn check(&self, args: &EmbryoCheckArgs<'_>) -> PolicyDecision {
-        if ZynxConfigs::instance().disable_debugger {
+        if !ZynxConfigs::instance().enable_debugger {
             return PolicyDecision::Deny;
         }