From 3b28c8aab65fbcefacd22a7d1bc6ce6c6f96a54c Mon Sep 17 00:00:00 2001
From: Xynnn007 <xynnn@linux.alibaba.com>
Date: Sun, 7 Apr 2024 12:56:17 +0800
Subject: [PATCH] AA: add built-in plugin information in --help

Signed-off-by: Xynnn007 <xynnn@linux.alibaba.com>
---
 .../attestation-agent/Cargo.toml              | 12 +++---
 attestation-agent/attestation-agent/build.rs  | 41 +++++++++++++++++++
 .../attestation-agent/src/bin/grpc-aa/main.rs |  4 +-
 .../src/bin/ttrpc-aa/main.rs                  |  4 +-
 4 files changed, 53 insertions(+), 8 deletions(-)

diff --git a/attestation-agent/attestation-agent/Cargo.toml b/attestation-agent/attestation-agent/Cargo.toml
index b37463959..2e0e8f5da 100644
--- a/attestation-agent/attestation-agent/Cargo.toml
+++ b/attestation-agent/attestation-agent/Cargo.toml
@@ -55,12 +55,12 @@ kbs = ["kbs_protocol/background_check", "token"]
 # CoCoAS Attestation Token
 coco_as = ["reqwest", "token"]
 
-all-attesters = ["kbs_protocol?/all-attesters", "attester/all-attesters"]
-tdx-attester = ["kbs_protocol/tdx-attester", "attester/tdx-attester"]
-sgx-attester = ["kbs_protocol/sgx-attester", "attester/sgx-attester"]
-az-snp-vtpm-attester = ["kbs_protocol/az-snp-vtpm-attester", "attester/az-snp-vtpm-attester"]
-az-tdx-vtpm-attester = ["kbs_protocol/az-tdx-vtpm-attester", "attester/az-tdx-vtpm-attester"]
-snp-attester = ["kbs_protocol/snp-attester", "attester/snp-attester"]
+all-attesters = ["tdx-attester", "sgx-attester", "az-snp-vtpm-attester", "az-tdx-vtpm-attester", "snp-attester"]
+tdx-attester = ["kbs_protocol?/tdx-attester", "attester/tdx-attester"]
+sgx-attester = ["kbs_protocol?/sgx-attester", "attester/sgx-attester"]
+az-snp-vtpm-attester = ["kbs_protocol?/az-snp-vtpm-attester", "attester/az-snp-vtpm-attester"]
+az-tdx-vtpm-attester = ["kbs_protocol?/az-tdx-vtpm-attester", "attester/az-tdx-vtpm-attester"]
+snp-attester = ["kbs_protocol?/snp-attester", "attester/snp-attester"]
 
 # Either `rust-crypto` or `openssl` should be enabled to work as underlying crypto module
 rust-crypto = ["kbs_protocol?/rust-crypto"]
diff --git a/attestation-agent/attestation-agent/build.rs b/attestation-agent/attestation-agent/build.rs
index d48bc81c1..39bf9a983 100644
--- a/attestation-agent/attestation-agent/build.rs
+++ b/attestation-agent/attestation-agent/build.rs
@@ -34,5 +34,46 @@ fn main() -> std::io::Result<()> {
             .expect("Generate ttrpc protocol code failed.");
     }
 
+    #[cfg(feature = "bin")]
+    {
+        use std::env;
+        use std::fs::File;
+        use std::io::Write;
+        use std::path::Path;
+
+        // generate an `intro` file that includes the feature information of the build
+        fn feature_list(features: Vec<&str>) -> String {
+            let enabled_features: Vec<&str> = features
+                .into_iter()
+                .filter(|&feature| env::var(format!("CARGO_FEATURE_{}", feature)).is_ok())
+                .collect();
+
+            enabled_features.join(", ")
+        }
+
+        let token_plugins = feature_list(vec!["KBS", "COCO_AS"]);
+        let attester = feature_list(vec![
+            "TDX_ATTESTER",
+            "SGX_ATTESTER",
+            "AZ_SNP_VTPM_ATTESTER",
+            "AZ_TDX_VTPM_ATTESTER",
+            "SNP_ATTESTER",
+        ]);
+
+        let out_dir = env::var("OUT_DIR").unwrap();
+        let dest_path = Path::new(&out_dir).join("intro");
+        let mut f = File::create(&dest_path).unwrap();
+
+        writeln!(
+                    f,
+                    "Attestation Agent (AA for short) is a service function set for attestation procedure in Confidential Containers. It provides kinds of service APIs related to attestation.\n\n",
+                )
+                .unwrap();
+
+        writeln!(f, "Supported Attesters: {}", attester).unwrap();
+
+        writeln!(f, "Token plugins: {}", token_plugins).unwrap();
+    }
+
     Ok(())
 }
diff --git a/attestation-agent/attestation-agent/src/bin/grpc-aa/main.rs b/attestation-agent/attestation-agent/src/bin/grpc-aa/main.rs
index 0c8bcc14a..f2fa0dfee 100644
--- a/attestation-agent/attestation-agent/src/bin/grpc-aa/main.rs
+++ b/attestation-agent/attestation-agent/src/bin/grpc-aa/main.rs
@@ -14,8 +14,10 @@ use std::net::SocketAddr;
 
 const DEFAULT_ATTESTATION_AGENT_ADDR: &str = "127.0.0.1:50002";
 
+const ABOUT: &str = include_str!(concat!(env!("OUT_DIR"), "/intro"));
+
 #[derive(Debug, Parser)]
-#[command(author, version, about, long_about = None)]
+#[command(author, version, about, long_about = Some(ABOUT))]
 struct Cli {
     /// Attestation gRPC Unix socket addr.
     ///
diff --git a/attestation-agent/attestation-agent/src/bin/ttrpc-aa/main.rs b/attestation-agent/attestation-agent/src/bin/ttrpc-aa/main.rs
index 719bdde4d..8e119e488 100644
--- a/attestation-agent/attestation-agent/src/bin/ttrpc-aa/main.rs
+++ b/attestation-agent/attestation-agent/src/bin/ttrpc-aa/main.rs
@@ -22,8 +22,10 @@ const DEFAULT_ATTESTATION_SOCKET_ADDR: &str = concatcp!(
     "attestation-agent.sock"
 );
 
+const ABOUT: &str = include_str!(concat!(env!("OUT_DIR"), "/intro"));
+
 #[derive(Debug, Parser)]
-#[command(author, version, about, long_about = None)]
+#[command(author, version, about, long_about = Some(ABOUT))]
 struct Cli {
     /// Attestation ttRPC Unix socket addr.
     ///