Traverser: Bring task system down gracefully on error

2 files changed, 56 insertions, 0 deletions

diff --git a/test/end-to-end/build-fails/TARGETS b/test/end-to-end/build-fails/TARGETS
new file mode 100644
index 00000000..05e2c957
--- /dev/null
+++ b/test/end-to-end/build-fails/TARGETS
@@ -0,0 +1,9 @@
+{ "single_fail_dep":
+  { "type": ["@", "rules", "shell/test", "script"]
+  , "name": ["single_fail_dep"]
+  , "test": ["single_fail_dep.sh"]
+  , "deps": [["test/end-to-end", "tool-under-test"]]
+  }
+, "TESTS":
+  {"type": "install", "tainted": ["test"], "deps": ["single_fail_dep"]}
+}
diff --git a/test/end-to-end/build-fails/single_fail_dep.sh b/test/end-to-end/build-fails/single_fail_dep.sh
new file mode 100755
index 00000000..c4e713b3
--- /dev/null
+++ b/test/end-to-end/build-fails/single_fail_dep.sh
@@ -0,0 +1,47 @@
+#!/bin/bash
+
+set -eu
+
+readonly NUM_DEPS=100
+readonly FAIL_DEP=42
+
+create_target() {
+  local ID=$1
+  if [ $ID = $FAIL_DEP ]; then
+    # failing target
+    echo '{"type": "generic", "cmds": ["false"], "out_dirs": ["out_'$ID'"]}'
+  else
+    # success target
+    echo '{"type": "generic", "cmds": ["echo '$ID' > out_'$ID'/id"], "out_dirs": ["out_'$ID'"]}'
+  fi
+}
+
+mkdir -p .buildroot
+
+touch ROOT
+
+cat <<EOF > TARGETS
+{ $(for i in $(seq $NUM_DEPS); do
+      if [ $i = 1 ]; then echo -n ' '; else echo -n '  , '; fi;
+      echo '"dep_'$i'": '$(create_target $i); done)
+, "main":
+  { "type": "generic"
+  , "cmds": ["cat out_*/id | sort -n > id"]
+  , "outs": ["id"]
+  , "deps":
+    [ $(for i in $(seq $NUM_DEPS); do
+          if [ $i = 1 ]; then echo -n ' '; else echo -n '    , '; fi;
+          echo '"dep_'$i'"';
+        done)
+    ]
+  }
+}
+EOF
+
+cat TARGETS
+
+echo "main" >&2
+bin/tool-under-test build --local-build-root .buildroot main && exit 1 || [ $? = 1 ]
+echo "done" >&2
+
+exit