t/*: rearrange tests into numbered directories.

It was getting way too ad-hoc in there.  Let's reorganize the tests so that
there's a good, obvious, suggested sequence to run them in.

t/950-curse/.gitignore

@@ -0,0 +1,5 @@
+*.n1
+*.n2
+*.count
+*.countall
+countall

t/950-curse/all.do

@@ -0,0 +1,6 @@
+. ./check-1.sh
+redo-ifchange 1.n0 2.n0 3.n0
+DEPS=$(./seq 10 | sed 's/$/.n1/')
+redo-ifchange $DEPS
+. ../skip-if-minimal-do.sh
+. ./check-2.sh

t/950-curse/check-1.sh

@@ -0,0 +1,3 @@
+rm -f in.countall out.countall *.count
+touch in.countall out.countall
+echo x >x.count

t/950-curse/check-2.sh

@@ -0,0 +1,12 @@
+COUNT_IN=$(ls *.count | wc -l)
+COUNT_OUT=$(cat *.count | wc -l)
+if [ "$COUNT_IN" -ne "$COUNT_OUT" ]; then
+	echo "expected $COUNT_IN individual writes, got $COUNT_OUT" >&2
+	exit 42
+fi
+COUNTALL_IN=$(cat in.countall | wc -l)
+COUNTALL_OUT=$(cat out.countall | wc -l)
+if [ "$COUNTALL_IN" -ne "$COUNTALL_OUT" ]; then
+	echo "expected $COUNTALL_IN allwrites, got $COUNTALL_OUT" >&2
+	exit 43
+fi

t/950-curse/clean.do

@@ -0,0 +1,3 @@
+rm -f *~ .*~ *.n0 *.n1 *.n2 *.tmp *.count countall *.countall
+
+

t/950-curse/countall.do

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+echo $1 >>out.countall
+echo hello

t/950-curse/default.n0.do

@@ -0,0 +1,2 @@
+DEPS=$(./seq 10 | sed 's/$/.n1/')
+redo-ifchange $DEPS

t/950-curse/default.n1.do

@@ -0,0 +1,3 @@
+DEPS=$(./seq 100 | sed 's/$/.n2/')
+redo-ifchange $DEPS
+echo n1-$2

t/950-curse/default.n2.do

@@ -0,0 +1,9 @@
+echo n2-$2
+echo $2 >>$2.count
+echo $2 >>in.countall
+
+# we deliberately use 'redo' here instead of redo-ifchange, because this *heavily*
+# stresses redo's locking when building in parallel.  We end up with 100
+# different targets that all not only depend on this file, but absolutely must
+# acquire the lock on this file, build it atomically, and release the lock.
+redo countall

t/950-curse/seq

@@ -0,0 +1,6 @@
+#!/bin/sh
+i=0
+while [ "$i" -lt "$1" ]; do
+	i=$(($i + 1))
+	echo $i
+done