1 files changed, 113 insertions, 0 deletions
diff --git a/tools/bash/runfiles/runfiles.bash b/tools/bash/runfiles/runfiles.bash
new file mode 100644
index 0000000000..d56a835bfa
--- /dev/null
+++ b/tools/bash/runfiles/runfiles.bash
@@ -0,0 +1,113 @@
+#!/bin/bash
+#
+# Copyright 2018 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This Bash script defines functions to handle sh_binary/sh_test runfiles.
+#
+# REQUIREMENTS:
+# - The RUNFILES_MANIFEST_FILE and/or the RUNFILES_DIR environment variable must
+#   be set to the absolute path of the runfiles manifest or the
+#   <rulename>.runfiles directory, respectively.
+# - If RUNFILES_MANIFEST_ONLY=1 is set, then RUNFILES_MANIFEST_FILE must be set
+#   to the absolute path of the runfiles manifest. RUNFILES_DIR may be unset in
+#   this case.
+# - If RUNFILES_LIB_DEBUG=1 is set, the script will print errors to stderr.
+
+case "$(uname -s | tr [:upper:] [:lower:])" in
+msys*|mingw*|cygwin*)
+  # matches an absolute Windows path
+  _rlocation_isabs_pattern="^[a-zA-Z]:[/\\]"
+  ;;
+*)
+  # matches an absolute Unix path
+  _rlocation_isabs_pattern="^/.*"
+  ;;
+esac
+
+# Prints to stdout the runtime location of a data-dependency.
+function rlocation() {
+  if [[ "$1" =~ $_rlocation_isabs_pattern ]]; then
+    # If the path is absolute, print it as-is.
+    echo $1
+  elif [[ "$1" =~ \.\. ]]; then
+    if [[ "${RUNFILES_LIB_DEBUG:-}" == 1 ]]; then
+      echo >&2 "ERROR[runfiles.bash]: rlocation($1): contains uplevel reference"
+    fi
+    return 1
+  elif [[ "$1" == \\* ]]; then
+    if [[ "${RUNFILES_LIB_DEBUG:-}" == 1 ]]; then
+      echo >&2 "ERROR[runfiles.bash]: rlocation($1): absolute path without" \
+               "drive name"
+    fi
+    return 1
+  else
+    if [[ "${RUNFILES_MANIFEST_ONLY:-}" == 1 ]]; then
+      if [[ -n "${RUNFILES_MANIFEST_FILE:-}" \
+            && -f "${RUNFILES_MANIFEST_FILE}" ]]; then
+        grep -m1 "^$1 " "${RUNFILES_MANIFEST_FILE}" | cut -d ' ' -f 2- \
+          || return 1
+      else
+        if [[ "${RUNFILES_LIB_DEBUG:-}" == 1 ]]; then
+          echo >&2 "ERROR[runfiles.bash]: trying to use manifest-based" \
+                   "runfiles but RUNFILES_MANIFEST_FILE is unset or" \
+                   "non-existent" \
+                   "(RUNFILES_MANIFEST_ONLY=\"${RUNFILES_MANIFEST_ONLY:-}\"," \
+                   "RUNFILES_DIR=\"${RUNFILES_DIR:-}\")"
+        fi
+        return 1
+      fi
+    elif [[ -n "${RUNFILES_DIR:-}" && -d "${RUNFILES_DIR}" ]]; then
+      echo "${RUNFILES_DIR}/$1"
+    else
+      if [[ "${RUNFILES_LIB_DEBUG:-}" == 1 ]]; then
+        echo >&2 "ERROR[runfiles.bash]: trying to use directory-based" \
+                 "runfiles but RUNFILES_DIR is unset or non-existent" \
+                 "(RUNFILES_MANIFEST_ONLY=\"${RUNFILES_MANIFEST_ONLY:-}\"," \
+                 "RUNFILES_MANIFEST_FILE=\"${RUNFILES_MANIFEST_FILE:-}\")"
+      fi
+      return 1
+    fi
+  fi
+}
+export -f rlocation
+
+# Exports the environment variables that subprocesses may need to use runfiles.
+# If a subprocess is a Bazel-built binary rule that also uses the runfiles
+# libraries under @bazel_tools//tools/bash/runfiles, then that binary needs
+# these envvars in order to initialize its own runfiles library.
+function runfiles_export_envvars() {
+  if [[ "${RUNFILES_MANIFEST_ONLY:-}" == 1 ]]; then
+    if [[ -z "${RUNFILES_MANIFEST_FILE:-}" \
+          && ! -f "$RUNFILES_MANIFEST_FILE" ]]; then
+      return 1
+    fi
+    if [[ -z "${RUNFILES_DIR:-}" ]]; then
+      if [[ "$RUNFILES_MANIFEST_FILE" == */MANIFEST \
+            && -d "${RUNFILES_MANIFEST_FILE%/MANIFEST}" ]]; then
+        export RUNFILES_DIR="${RUNFILES_MANIFEST_FILE%/MANIFEST}"
+      elif [[ "$RUNFILES_MANIFEST_FILE" == *runfiles_manifest \
+            && -d "${RUNFILES_MANIFEST_FILE%_manifest}" ]]; then
+        export RUNFILES_DIR="${RUNFILES_MANIFEST_FILE%_manifest}"
+      fi
+    fi
+  fi
+  # No need to define anything if RUNFILES_MANIFEST_ONLY is not 1: it makes no
+  # difference whether RUNFILES_DIR is defined or not.
+
+  export RUNFILES_MANIFEST_FILE="${RUNFILES_MANIFEST_FILE:-}"
+  export RUNFILES_DIR="${RUNFILES_DIR:-}"
+  export JAVA_RUNFILES="${RUNFILES_DIR:-}"
+}
+export -f runfiles_export_envvars