From 3c2fc49c631a6891ccabc61cb02280cf200497ce Mon Sep 17 00:00:00 2001
From: Avery Pennarun <apenwarr@gmail.com>
Date: Fri, 12 Nov 2010 22:15:34 -0800
Subject: [PATCH] Complicate the test build a bit to show unnecessary
 dependency re-checking.

'./redo -d test' reveals that we check and re-check things like CC and LD
even when they're children of objects that don't need to be rebuilt, and who
we've already checked earlier in the build cycle.  We need to be a little
smarter about pruning if we want dependency checking to be fast.
---
 TODO          | 8 ++++++--
 clean.do      | 2 +-
 t/bellow.do   | 2 ++
 t/it.do       | 3 ++-
 t/yellow.do   | 2 ++
 t/yellow.o.do | 2 ++
 6 files changed, 15 insertions(+), 4 deletions(-)
 create mode 100644 t/bellow.do
 create mode 100644 t/yellow.do
 create mode 100644 t/yellow.o.do

diff --git a/TODO b/TODO
index 8ea1c92..d707d90 100644
--- a/TODO
+++ b/TODO
@@ -3,7 +3,11 @@
 	jwack jobserver
 		make compatibility
 		sockety interface
-	sqlite .redo database
+	sqlite .redo database?
 	rename --ifchange/--ifcreate to separate programs
 	rewrite ifchange/ifcreate in C
-	
\ No newline at end of file
+	always update database atomically?
+	find the right .repo dir automatically
+	cd into subdir automatically
+	'redo clean' should work
+	aggressively mark stuff as done in the .redo database
\ No newline at end of file
diff --git a/clean.do b/clean.do
index 97f6955..b1ae425 100644
--- a/clean.do
+++ b/clean.do
@@ -1 +1 @@
-rm -f t/hello t/*.o *~ .*~ t/*~ t/.*~ *.pyc t/CC t/LD
+rm -f t/hello t/[by]ellow t/*.o *~ .*~ t/*~ t/.*~ *.pyc t/CC t/LD
diff --git a/t/bellow.do b/t/bellow.do
new file mode 100644
index 0000000..9ab2cf2
--- /dev/null
+++ b/t/bellow.do
@@ -0,0 +1,2 @@
+redo --ifchange LD yellow.o
+./LD bellow yellow.o
diff --git a/t/it.do b/t/it.do
index 22e2266..9489b33 100644
--- a/t/it.do
+++ b/t/it.do
@@ -1 +1,2 @@
-redo --ifchange hello
+redo --ifchange hello yellow bellow
+
diff --git a/t/yellow.do b/t/yellow.do
new file mode 100644
index 0000000..7faac8f
--- /dev/null
+++ b/t/yellow.do
@@ -0,0 +1,2 @@
+redo --ifchange LD yellow.o
+./LD yellow yellow.o
diff --git a/t/yellow.o.do b/t/yellow.o.do
new file mode 100644
index 0000000..331c775
--- /dev/null
+++ b/t/yellow.o.do
@@ -0,0 +1,2 @@
+redo --ifchange CC hello.c
+gcc -o $3 -c hello.c