From a10d2bf57ba42a8fe5d67d7ba4fc2ddc2d759c8e Mon Sep 17 00:00:00 2001
From: Bjorn Andersson <quic_bjorande@quicinc.com>
Date: Mon, 25 Mar 2024 09:50:59 -0500
Subject: [PATCH] Makefile: Generate compile_commands.json

Introduce a make target for generating compile_commands.json to feed
clangd and the Language Server Protocol, to gain better editor
integration.

Add the relevant files to .gitignore.

Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
 .gitignore | 2 ++
 Makefile   | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/.gitignore b/.gitignore
index f12beef..0faf217 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 *.o
 qdl
 ks
+compile_commands.json
+.cache
diff --git a/Makefile b/Makefile
index e0dec0d..6b035ad 100644
--- a/Makefile
+++ b/Makefile
@@ -19,9 +19,13 @@ $(OUT): $(OBJS)
 $(KS_OUT): $(KS_OBJS)
 	$(CC) -o $@ $^ $(LDFLAGS)
 
+compile_commands.json: $(SRCS) $(KS_SRCS)
+	@echo -n $^ | jq -snR "[inputs|split(\" \")[]|{directory:\"$(PWD)\", command: \"$(CC) $(CFLAGS) -c \(.)\", file:.}]" > $@
+
 clean:
 	rm -f $(OUT) $(OBJS)
 	rm -f $(KS_OUT) $(KS_OBJS)
+	rm -f compile_commands.json
 
 install: $(OUT) $(KS_OUT)
 	install -d $(DESTDIR)$(prefix)/bin