Merge branch 'parallel-tests' of https://github.com/tweag/nix

mk/run_test.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+set -u
+
+red=""
+green=""
+yellow=""
+normal=""
+
+post_run_msg="ran test $1..."
+if [ -t 1 ]; then
+    red=""
+    green=""
+    yellow=""
+    normal=""
+fi
+(cd $(dirname $1) && env ${TESTS_ENVIRONMENT} init.sh 2>/dev/null > /dev/null)
+log="$(cd $(dirname $1) && env ${TESTS_ENVIRONMENT} $(basename $1) 2>&1)"
+status=$?
+if [ $status -eq 0 ]; then
+  echo "$post_run_msg [${green}PASS$normal]"
+elif [ $status -eq 99 ]; then
+  echo "$post_run_msg [${yellow}SKIP$normal]"
+else
+  echo "$post_run_msg [${red}FAIL$normal]"
+  echo "$log" | sed 's/^/    /'
+  exit "$status"
+fi

mk/tests.mk

@@ -1,45 +1,12 @@
 # Run program $1 as part of ‘make installcheck’.
 define run-install-test
 
-  installcheck: $1
+  installcheck: $1.test
 
-  _installcheck-list += $1
+  .PHONY: $1.test
+  $1.test: $1 tests/common.sh tests/init.sh
+	@env TEST_NAME=$1 TESTS_ENVIRONMENT="$(tests-environment)" mk/run_test.sh $1
 
 endef
 
-# Color code from https://unix.stackexchange.com/a/10065
-installcheck:
-	@total=0; failed=0; \
-	red=""; \
-	green=""; \
-	yellow=""; \
-	normal=""; \
-	if [ -t 1 ]; then \
-		red=""; \
-		green=""; \
-		yellow=""; \
-		normal=""; \
-	fi; \
-	for i in $(_installcheck-list); do \
-	  total=$$((total + 1)); \
-	  printf "running test $$i..."; \
-	  log="$$(cd $$(dirname $$i) && $(tests-environment) $$(basename $$i) 2>&1)"; \
-	  status=$$?; \
-	  if [ $$status -eq 0 ]; then \
-	    echo " [$${green}PASS$$normal]"; \
-	  elif [ $$status -eq 99 ]; then \
-	    echo " [$${yellow}SKIP$$normal]"; \
-	  else \
-	    echo " [$${red}FAIL$$normal]"; \
-	    echo "$$log" | sed 's/^/    /'; \
-	    failed=$$((failed + 1)); \
-	  fi; \
-	done; \
-	if [ "$$failed" != 0 ]; then \
-	  echo "$${red}$$failed out of $$total tests failed $$normal"; \
-	  exit 1; \
-	else \
-		echo "$${green}All tests succeeded$$normal"; \
-	fi
-
 .PHONY: check installcheck

tests/common.sh.in

@@ -1,6 +1,6 @@
 set -e
 
-export TEST_ROOT=$(realpath ${TMPDIR:-/tmp}/nix-test)
+export TEST_ROOT=$(realpath ${TMPDIR:-/tmp}/nix-test)/${TEST_NAME:-default}
 export NIX_STORE_DIR
 if ! NIX_STORE_DIR=$(readlink -f $TEST_ROOT/store 2> /dev/null); then
     # Maybe the build directory is symlinked.

tests/gc-auto.sh

@@ -13,24 +13,32 @@ fake_free=$TEST_ROOT/fake-free
 export _NIX_TEST_FREE_SPACE_FILE=$fake_free
 echo 1100 > $fake_free
 
+fifoLock=$TEST_ROOT/fifoLock
+mkfifo "$fifoLock"
+
 expr=$(cat <<EOF
 with import ./config.nix; mkDerivation {
   name = "gc-A";
   buildCommand = ''
     set -x
     [[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 3 ]]
+
     mkdir \$out
     echo foo > \$out/bar
-    echo 1...
+
-    sleep 2
+    # Pretend that we run out of space
-    echo 200 > ${fake_free}.tmp1
+    echo 100 > ${fake_free}.tmp1
     mv ${fake_free}.tmp1 $fake_free
-    echo 2...
+
-    sleep 2
+    # Wait for the GC to run
-    echo 3...
+    for i in {1..20}; do
-    sleep 2
+        echo ''\${i}...
-    echo 4...
+        if [[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 1 ]]; then
-    [[ \$(ls \$NIX_STORE/*-garbage? | wc -l) = 1 ]]
+            exit 0
+        fi
+        sleep 1
+    done
+    exit 1
   '';
 }
 EOF
@@ -43,15 +51,9 @@ with import ./config.nix; mkDerivation {
     set -x
     mkdir \$out
     echo foo > \$out/bar
-    echo 1...
+
-    sleep 2
+    # Wait for the first build to finish
-    echo 200 > ${fake_free}.tmp2
+    cat "$fifoLock"
-    mv ${fake_free}.tmp2 $fake_free
-    echo 2...
-    sleep 2
-    echo 3...
-    sleep 2
-    echo 4...
   '';
 }
 EOF
@@ -59,12 +61,19 @@ EOF
 
 nix build -v -o $TEST_ROOT/result-A -L "($expr)" \
     --min-free 1000 --max-free 2000 --min-free-check-interval 1 &
-pid=$!
+pid1=$!
 
 nix build -v -o $TEST_ROOT/result-B -L "($expr2)" \
-    --min-free 1000 --max-free 2000 --min-free-check-interval 1
+    --min-free 1000 --max-free 2000 --min-free-check-interval 1 &
+pid2=$!
 
-wait "$pid"
+# Once the first build is done, unblock the second one.
+# If the first build fails, we need to postpone the failure to still allow
+# the second one to finish
+wait "$pid1" || FIRSTBUILDSTATUS=$?
+echo "unlock" > $fifoLock
+( exit ${FIRSTBUILDSTATUS:-0} )
+wait "$pid2"
 
 [[ foo = $(cat $TEST_ROOT/result-A/bar) ]]
 [[ foo = $(cat $TEST_ROOT/result-B/bar) ]]

tests/gc-concurrent.builder.sh

@@ -1,7 +1,10 @@
+echo "Build started" > "$lockFifo"
+
 mkdir $out
 echo $(cat $input1/foo)$(cat $input2/bar) > $out/foobar
 
-sleep 10
+# Wait for someone to write on the fifo
+cat "$lockFifo"
 
 # $out should not have been GC'ed while we were sleeping, but just in
 # case...

tests/gc-concurrent.nix

@@ -1,5 +1,7 @@
 with import ./config.nix;
 
+{ lockFifo ? null }:
+
 rec {
 
   input1 = mkDerivation {
@@ -16,6 +18,7 @@ rec {
     name = "gc-concurrent";
     builder = ./gc-concurrent.builder.sh;
     inherit input1 input2;
+    inherit lockFifo;
   };
 
   test2 = mkDerivation {

tests/gc-concurrent.sh

@@ -2,7 +2,10 @@ source common.sh
 
 clearStore
 
-drvPath1=$(nix-instantiate gc-concurrent.nix -A test1)
+lockFifo1=$TEST_ROOT/test1.fifo
+mkfifo "$lockFifo1"
+
+drvPath1=$(nix-instantiate gc-concurrent.nix -A test1 --argstr lockFifo "$lockFifo1")
 outPath1=$(nix-store -q $drvPath1)
 
 drvPath2=$(nix-instantiate gc-concurrent.nix -A test2)
@@ -22,19 +25,16 @@ ln -s $outPath3 "$NIX_STATE_DIR"/gcroots/foo2
 nix-store -rvv "$drvPath1" &
 pid1=$!
 
-# Start build #2 in the background after 10 seconds.
+# Wait for the build of $drvPath1 to start
-(sleep 10 && nix-store -rvv "$drvPath2") &
+cat $lockFifo1
-pid2=$!
 
 # Run the garbage collector while the build is running.
-sleep 6
 nix-collect-garbage
 
-# Wait for build #1/#2 to finish.
+# Unlock the build of $drvPath1
+echo "" > $lockFifo1
 echo waiting for pid $pid1 to finish...
 wait $pid1
-echo waiting for pid $pid2 to finish...
-wait $pid2
 
 # Check that the root of build #1 and its dependencies haven't been
 # deleted.  The should not be deleted by the GC because they were
@@ -42,8 +42,9 @@ wait $pid2
 cat $outPath1/foobar
 cat $outPath1/input-2/bar
 
-# Check that build #2 has succeeded.  It should succeed because the
+# Check that the build build $drvPath2 succeeds.
-# derivation is a GC root.
+# It should succeed because the derivation is a GC root.
+nix-store -rvv "$drvPath2"
 cat $outPath2/foobar
 
 rm -f "$NIX_STATE_DIR"/gcroots/foo*

tests/gc-concurrent2.builder.sh

@@ -3,5 +3,3 @@ echo $(cat $input1/foo)$(cat $input2/bar)xyzzy > $out/foobar
 
 # Check that the GC hasn't deleted the lock on our output.
 test -e "$out.lock"
-
-sleep 6