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/350-deps/.gitignore

@@ -0,0 +1,7 @@
+t1a
+t2.count
+overwrite
+overwrite[123]
+genfile2
+genfile.log
+static.log

t/350-deps/all.do

@@ -0,0 +1,2 @@
+redo test1 test2 ifchange-fail overwrite gentest doublestatic \
+	basic/test

t/350-deps/basic/.gitignore

@@ -0,0 +1,2 @@
+*.log
+*.out

t/350-deps/basic/1.in

@@ -0,0 +1 @@
+this is 1

t/350-deps/basic/2.in

@@ -0,0 +1 @@
+this is 2

t/350-deps/basic/clean.do

@@ -0,0 +1,2 @@
+rm -f *~ .*~ *.log *.out
+

t/350-deps/basic/default.out.do

@@ -0,0 +1,3 @@
+redo-ifchange $2.in
+echo $$
+echo $$ >>$2.log

t/350-deps/basic/test.do

@@ -0,0 +1,13 @@
+rm -f *.out *.log
+
+../../flush-cache
+redo-ifchange 1.out 2.out
+[ "$(cat 1.log | wc -l)" -eq 1 ] || exit 55
+[ "$(cat 2.log | wc -l)" -eq 1 ] || exit 56
+../../flush-cache
+touch 1.in
+redo-ifchange 1.out 2.out
+[ "$(cat 2.log | wc -l)" -eq 1 ] || exit 58
+. ../../skip-if-minimal-do.sh
+[ "$(cat 1.log | wc -l)" -eq 2 ] || exit 57
+

t/350-deps/broken.do

@@ -0,0 +1 @@
+false

t/350-deps/clean.do

@@ -0,0 +1,3 @@
+redo basic/clean dirtest/clean
+rm -f *~ .*~ *.count t1a overwrite overwrite[123] \
+	genfile2 genfile.log static.log

t/350-deps/doublestatic.do

@@ -0,0 +1,11 @@
+rm -f static.log
+
+redo static1 static2
+
+touch static.in
+../flush-cache
+redo-ifchange static1 static2
+
+COUNT=$(wc -l <static.log)
+. ../skip-if-minimal-do.sh
+[ "$COUNT" -eq 4 ] || exit 55

t/350-deps/genfile1.do

@@ -0,0 +1,2 @@
+redo-ifchange genfile2
+echo $$ >>genfile.log

t/350-deps/gentest.do

@@ -0,0 +1,21 @@
+rm -f genfile2 genfile2.do genfile.log
+
+echo echo hello >genfile2.do
+../flush-cache
+redo genfile1
+
+# this will cause a rebuild:
+#      genfile1 depends on genfile2 depends on genfile2.do
+rm -f genfile2.do
+../flush-cache
+redo-ifchange genfile1
+
+# but genfile2.do was gone last time, so genfile2 no longer depends on it.
+# thus, it can be considered up-to-date.  Prior versions of redo had a bug
+# where the dependency on genfile2.do was never dropped.
+../flush-cache
+redo-ifchange genfile1
+
+COUNT=$(wc -l <genfile.log)
+. ../skip-if-minimal-do.sh
+[ "$COUNT" -eq 2 ] || exit 77

t/350-deps/ifchange-fail.do

@@ -0,0 +1,4 @@
+if redo-ifchange broken 2>/dev/null; then
+	echo "expected broken.do to fail, but it didn't" >&2
+	exit 44
+fi

t/350-deps/overwrite.do

@@ -0,0 +1,6 @@
+. ../skip-if-minimal-do.sh
+
+redo overwrite1 2>&1 && exit 55
+redo overwrite2 2>&1 && exit 56
+redo overwrite3 2>&1 && exit 57
+exit 0

t/350-deps/overwrite1.do

@@ -0,0 +1,2 @@
+# this shouldn't be allowed; we're supposed to write to $3, not $1
+echo >$1

t/350-deps/overwrite2.do

@@ -0,0 +1,5 @@
+# this shouldn't be allowed; stdout is connected to $3 already, so if we
+# replace it *and* write to stdout, we're probably confused.
+echo hello world
+rm -f $3
+echo goodbye world >$3

t/350-deps/overwrite3.do

@@ -0,0 +1,8 @@
+# we don't delete $3 here, we just truncate and overwrite it.  But redo
+# can detect this by checking the current file position of our stdout when
+# we exit, and making sure it equals either 0 or the file size.
+#
+# If it doesn't, then we accidentally wrote to *both* stdout and a separate
+# file, and we should get warned about it.
+echo hello world
+echo goodbye world >$3

t/350-deps/static1.do

@@ -0,0 +1,2 @@
+redo-ifchange static.in
+echo $$ >>static.log

t/350-deps/static2.do

@@ -0,0 +1,2 @@
+redo-ifchange static.in
+echo $$ >>static.log

t/350-deps/t1a.do

@@ -0,0 +1,2 @@
+redo-ifchange t1dep
+echo $$

t/350-deps/t1dep.do

@@ -0,0 +1 @@
+# nothing to do

t/350-deps/t2.do

@@ -0,0 +1 @@
+echo $$ >>t2.count

t/350-deps/test1.do

@@ -0,0 +1,15 @@
+# force-rebuild t1dep
+redo t1dep
+
+if [ -e t1a ]; then
+	BEFORE="$(cat t1a)"
+else
+	BEFORE=
+fi
+../flush-cache
+redo-ifchange t1a  # it definitely had to rebuild because t1dep changed
+AFTER="$(cat t1a)"
+if [ "$BEFORE" = "$AFTER" ]; then
+	echo "t1a was not rebuilt!" >&2
+	exit 43
+fi

t/350-deps/test2.do

@@ -0,0 +1,9 @@
+rm -f t2.count
+redo t2
+redo t2
+OUT=$(cat t2.count | wc -l)
+. ../skip-if-minimal-do.sh
+if [ "$OUT" -ne 2 ]; then
+	echo "t2: expected 2"
+	exit 43
+fi