Install sharness in a 'sharness' directory

It is cleaner if sharness is installed in its own
directory.

test/.gitignore

+sharness/
 test-results/
 trash directory.*.sh/

test/Makefile

@@ -5,6 +5,7 @@
 #
 
 T = $(sort $(wildcard t[0-9][0-9][0-9][0-9]-*.sh))
+SHARNESS = sharness/sharness.sh
 
 all: clean deps $(T) aggregate
 
@@ -20,21 +21,22 @@ aggregate:
 	@echo "*** $@ ***"
 	./test-aggregate-results.sh
 
-deps: ipfs sharness.sh random
+deps: $(SHARNESS) ipfs random
+
+$(SHARNESS):
+	@echo "*** installing $@ ***"
+	./install-sharness.sh
 
 # phony to ensure we re-build it every time we run tests
 ipfs:
+	@echo "*** installing $@ ***"
 	cd ../cmd/ipfs && go build
 	cp ../cmd/ipfs/ipfs ipfs
 
-sharness.sh:
-	@echo "*** installing $@ ***"
-	./install-sharness.sh
-
-.PHONY: all clean $(T) aggregate ipfs
-
 random:
 	@echo "*** installing $@ ***"
 	go get github.com/jbenet/go-random/random
 	go install github.com/jbenet/go-random/random
 	cp `which random` random
+
+.PHONY: all clean $(T) aggregate ipfs random

test/install-sharness.sh

@@ -16,6 +16,11 @@ shash=eeaf96630fc25ec58fb678b64ef9772d5eb92f64
 afile=aggregate-results.sh
 ahash=948d6bc03222c5c00a1ed048068508d5ea1cce59
 
+die() {
+  echo >&2 $@
+  exit 1
+}
+
 verified_download() {
   file=$1
   hash1=$2
@@ -34,6 +39,8 @@ verified_download() {
   return 0
 }
 
+mkdir -p sharness || die "Could not create 'sharness' directory"
+cd sharness || die "Could not cd into 'sharness' directory"
 
 verified_download "$sfile" "$shash"; sok=$?
 verified_download "$afile" "$ahash"; aok=$?

test/test-aggregate-results.sh

@@ -6,7 +6,7 @@
 # MIT Licensed; see the LICENSE file in this repository.
 #
 
-SHARNESS_AGGREGATE="./aggregate-results.sh"
+SHARNESS_AGGREGATE="sharness/aggregate-results.sh"
 
 test -f "$SHARNESS_AGGREGATE" || {
 	echo >&2 "Cannot find: $SHARNESS_AGGREGATE"

test/test-lib.sh

@@ -18,7 +18,7 @@ if test `which ipfs` != $(pwd)/ipfs; then
 	exit 1
 fi
 
-SHARNESS_LIB="./sharness.sh"
+SHARNESS_LIB="sharness/sharness.sh"
 
 . "$SHARNESS_LIB" || {
 	echo >&2 "Cannot source: $SHARNESS_LIB"