Remove special case for "dirname" -> "dirname/all"

It actually decreases readability of the .do files - by not making it
explicit when you're going into a subdir.

Plus it adds ambiguity: what if there's a dirname.do *and* a dirname/all?
We could resolve the ambiguity if we wanted, but that adds more code, while
taking out this special case makes *less* code and improves readability.
I think it's the right way to go.

builder.py

@@ -176,9 +176,6 @@ def main(targets, shouldbuildfunc):
 
     for i in range(len(targets)):
         t = targets[i]
-        if os.path.exists('%s/all.do' % t):
-            # t is a directory, but it has a default target
-            targets[i] = '%s/all' % t
 
     # In the first cycle, we just build as much as we can without worrying
     # about any lock contention.  If someone else has it locked, we move on.

minimal/do

@@ -73,9 +73,6 @@ _do()
 redo()
 {
 	for i in "$@"; do
-		if [ -e "$i/." ]; then
-			i="$i/all"
-		fi
 		_dirsplit "$i"
 		( cd "$dir" && _do "$dir" "$base" ) || exit $?
 	done

redo-ifchange.py

@@ -5,8 +5,13 @@ from helpers import debug, err, mkdirp, unlink
 
 
 def dirty_deps(t, depth):
-    if os.path.exists('%s/.' % t):
-        t = '%s/all' % t
+    try:
+        st = os.stat(t)
+        realtime = st.st_mtime
+    except OSError:
+        st = None
+        realtime = 0
+    
     debug('%s?%s\n' % (depth, t))
     if state.isbuilt(t):
         debug('%s-- DIRTY (built)\n' % depth)
@@ -20,11 +25,6 @@ def dirty_deps(t, depth):
         debug('%s-- DIRTY (no stamp)\n' % depth)
         return True
 
-    try:
-        realtime = os.stat(t).st_mtime
-    except OSError:
-        realtime = 0
-
     if stamptime != realtime:
         debug('%s-- DIRTY (mtime)\n' % depth)
         return True

t/.gitignore

@@ -8,3 +8,5 @@ test.args
 test2.args
 /passfail
 mode1
+makedir
+makedir.log

t/all.do

@@ -1 +1,2 @@
-redo-ifchange hello yellow bellow c d example/
+redo-ifchange hello yellow bellow c d example/all
+

t/clean.do

@@ -1,4 +1,4 @@
 redo example/clean curse/clean deps/clean "space dir/clean"
-rm -f c c.c c.c.c c.c.c.b c.c.c.b.b d mode1
+rm -f c c.c c.c.c c.c.c.b c.c.c.b.b d mode1 makedir.log
 rm -f hello [by]ellow *.o *~ .*~ CC LD passfail
 rm -rf makedir

t/deps/dirtest/t1.do

@@ -1,2 +1,2 @@
-redo-ifchange dir1/
+redo-ifchange dir1/all
 echo $$ >>log

t/deps/dirtest/t2.do

@@ -1,2 +0,0 @@
-redo-ifchange dir1
-echo $$ >>log

t/deps/dirtest/t3.do

@@ -1,2 +0,0 @@
-redo-ifchange dir1/all
-echo $$ >>log

t/deps/dirtest/test.do

@@ -1,19 +1,15 @@
-touch t?.do
-for first in t1 t2 t3; do
-	for second in t1 t2 t3; do
-		rm -f log dir1/log dir1/stinky
-		. ../../flush-cache.sh
-		redo $first
-		touch $second.do
-		. ../../flush-cache.sh
-		redo $second
-		. ../../flush-cache.sh
-		redo-ifchange $second
-		C1="$(wc -l <dir1/log)"
-		C2="$(wc -l <log)"
-		if [ "$C1" != 1 -o "$C2" != 2 ]; then
-			echo "failed: $first>$second, c1=$C1, c2=$C2" >&2
+rm -f log dir1/log dir1/stinky
+touch t1.do
+. ../../flush-cache.sh
+redo t1
+touch t1.do
+. ../../flush-cache.sh
+redo t1
+. ../../flush-cache.sh
+redo-ifchange t1
+C1="$(wc -l <dir1/log)"
+C2="$(wc -l <log)"
+if [ "$C1" != 1 -o "$C2" != 2 ]; then
+	echo "failed: t1>t1, c1=$C1, c2=$C2" >&2
 	exit 55
-		fi
-	done
-done
+fi

t/makedir.do

@@ -1,2 +1,3 @@
-[ -e "$1" ] && rmdir $1
+rm -rf "$1"
 mkdir $1
+echo $$ >>makedir.log

t/makedir2.do

@@ -0,0 +1,7 @@
+rm -f makedir.log
+redo makedir
+touch makedir/outfile
+. ./flush-cache.sh
+redo-ifchange makedir
+COUNT=$(wc -l <makedir.log)
+[ "$COUNT" = 1 ] || exit 99

t/test.do

@@ -1,4 +1,4 @@
 redo-ifchange all
 ./hello >&2
 redo deltest deltest2 test.args test2.args passfailtest \
-	curse/test deps/test "space dir/test" modetest makedir
+	curse/test deps/test "space dir/test" modetest makedir2