feat: QCHAT_PROCESS_ID and pre-push hook

.husky/pre-push

@@ -0,0 +1,9 @@
+# Check if Amazon Q chat is active
+if [ -n "$QCHAT_PROCESS_ID" ]; then
+  echo "ERROR: Git push blocked while Amazon Q chat is active (QCHAT_PROCESS_ID=$QCHAT_PROCESS_ID)"
+  echo "Please exit Amazon Q chat with '/quit' before pushing changes."
+  exit 1
+fi
+
+# Continue with push if QCHAT_PROCESS_ID is not set
+exit 0

crates/chat-cli/src/cli/chat/consts.rs

@@ -26,3 +26,6 @@ pub const MAX_NUMBER_OF_IMAGES_PER_REQUEST: usize = 10;
 
 /// In bytes - 10 MB
 pub const MAX_IMAGE_SIZE: usize = 10 * 1024 * 1024;
+
+/// Environment variable containing the pid of the chat session.
+pub const QCHAT_PROCESS_ID: &str = "QCHAT_PROCESS_ID";

crates/chat-cli/src/cli/chat/mod.rs

@@ -1,6 +1,6 @@
 pub mod cli;
 mod command;
-mod consts;
+pub mod consts;
 mod context;
 mod conversation_state;
 mod hooks;

crates/chat-cli/src/cli/mod.rs

@@ -1,4 +1,4 @@
-mod chat;
+pub mod chat;
 mod debug;
 mod diagnostics;
 mod feed;

crates/chat-cli/src/main.rs

@@ -17,6 +17,7 @@ use clap::Parser;
 use crossterm::style::Stylize;
 use eyre::Result;
 use logging::get_log_level_max;
+use platform::Context;
 use tracing::metadata::LevelFilter;
 
 #[global_allocator]
@@ -33,6 +34,18 @@ fn main() -> Result<ExitCode> {
         },
     };
 
+    // Set the QCHAT_PROCESS_ID env var if we're launching chat.
+    #[cfg(unix)]
+    match parsed.subcommand {
+        Some(cli::CliRootCommands::Chat(_)) | None => {
+            let ctx = Context::new();
+            let current_pid = nix::unistd::getpid().as_raw().to_string();
+            // SAFETY: This is only executed in a single-threaded context.
+            unsafe { ctx.env().set_var(cli::chat::consts::QCHAT_PROCESS_ID, current_pid) };
+        },
+        _ => (),
+    }
+
     let verbose = parsed.verbose > 0;
     let runtime = tokio::runtime::Builder::new_multi_thread().enable_all().build()?;
     let result = runtime.block_on(parsed.execute());