repo/bazel: Make it work externally (#18)

Signed-off-by: Ryan Northey <ryan@synca.io>

examples.bzl

@@ -11,8 +11,21 @@ def envoy_example(name, shared = ":shared_files", common_fun = ":verify-common.s
         name = "%s_dir" % name,
         outs = ["%s_dir.tar" % name],
         cmd = """
-            tar chf $@ -C . shared verify-common.sh %s
-        """ % name,
+            SHARED_PATHS="$(locations %s)"
+            SHARED=$$(echo $$SHARED_PATHS | cut -d/ -f1)
+            # This is a bit hacky and may not work in all bazel situations, but works for now
+            if [[ $$SHARED == "external" ]]; then
+                SHARED=$$(echo $$SHARED_PATHS | cut -d/ -f-3)
+            fi
+            EXAMPLE_PATHS="$(locations %s_files)"
+            EXAMPLE=$$(echo $$EXAMPLE_PATHS | cut -d/ -f1)
+            # This is a bit hacky and may not work in all bazel situations, but works for now
+            if [[ $$EXAMPLE == "external" ]]; then
+                EXAMPLE=$$(echo $$EXAMPLE_PATHS | cut -d/ -f-3)
+            fi
+
+            tar chf $@ -C . $$SHARED $(location %s) $$EXAMPLE
+        """ % (shared, name, common_fun),
         tools = [
             common_fun,
             shared,

verify_example.sh

@@ -24,7 +24,13 @@ complete () {
 
 verify () {
     tar xf $EXAMPLE_DIR -C $RUNDIR
-    cd "$RUNDIR/${EXAMPLE_NAME}"
+    cd "$RUNDIR"
+    dirlist=$(ls .)
+    if [[ "$dirlist" == "external" ]]; then
+        cd "external/envoy_examples/${EXAMPLE_NAME}"
+    else
+        cd "${EXAMPLE_NAME}"
+    fi
     script -q -c "unbuffer ./verify.sh" "$TMPOUT" >/dev/null
 }