1 files changed, 101 insertions, 0 deletions
diff --git a/soong_ui.bash b/soong_ui.bash
new file mode 100755
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+++ b/soong_ui.bash
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+#!/bin/bash -eu
+#
+# Copyright 2017 Google Inc. 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.
+
+# To track how long we took to startup. %N isn't supported on Darwin, but
+# that's detected in the Go code, and skip calculating the startup time.
+export TRACE_BEGIN_SOONG=$(date +%s%N)
+
+# Function to find top of the source tree (if $TOP isn't set) by walking up the
+# tree.
+function gettop
+{
+    local TOPFILE=build/soong/root.bp
+    if [ -z "${TOP-}" -a -f "${TOP-}/${TOPFILE}" ] ; then
+        # The following circumlocution ensures we remove symlinks from TOP.
+        (cd $TOP; PWD= /bin/pwd)
+    else
+        if [ -f $TOPFILE ] ; then
+            # The following circumlocution (repeated below as well) ensures
+            # that we record the true directory name and not one that is
+            # faked up with symlink names.
+            PWD= /bin/pwd
+        else
+            local HERE=$PWD
+            T=
+            while [ \( ! \( -f $TOPFILE \) \) -a \( $PWD != "/" \) ]; do
+                \cd ..
+                T=`PWD= /bin/pwd -P`
+            done
+            \cd $HERE
+            if [ -f "$T/$TOPFILE" ]; then
+                echo $T
+            fi
+        fi
+    fi
+}
+
+# Bootstrap microfactory from source if necessary and use it to build the
+# soong_ui binary, then run soong_ui.
+function run_go
+{
+    # Increment when microfactory changes enough that it cannot rebuild itself.
+    # For example, if we use a new command line argument that doesn't work on older versions.
+    local mf_version=1
+
+    local mf_src="${TOP}/build/soong/cmd/microfactory"
+
+    local out_dir="${OUT_DIR:-${TOP}/out}"
+    local mf_bin="${out_dir}/microfactory_$(uname)"
+    local mf_version_file="${out_dir}/.microfactory_$(uname)_version"
+    local soong_ui_bin="${out_dir}/soong_ui"
+    local from_src=1
+
+    if [ -f "${mf_bin}" ] && [ -f "${mf_version_file}" ]; then
+        if [ "${mf_version}" -eq "$(cat "${mf_version_file}")" ]; then
+            from_src=0
+        fi
+    fi
+
+    local mf_cmd
+    if [ $from_src -eq 1 ]; then
+        mf_cmd="${GOROOT}/bin/go run ${mf_src}/microfactory.go"
+    else
+        mf_cmd="${mf_bin}"
+    fi
+
+    ${mf_cmd} -s "${mf_src}" -b "${mf_bin}" \
+            -pkg-path "android/soong=${TOP}/build/soong" -trimpath "${TOP}/build/soong" \
+            -o "${soong_ui_bin}" android/soong/cmd/soong_ui
+
+    if [ $from_src -eq 1 ]; then
+        echo "${mf_version}" >"${mf_version_file}"
+    fi
+
+    exec "${out_dir}/soong_ui" "$@"
+}
+
+export TOP=$(gettop)
+case $(uname) in
+    Linux)
+        export GOROOT="${TOP}/prebuilts/go/linux-x86/"
+        ;;
+    Darwin)
+        export GOROOT="${TOP}/prebuilts/go/darwin-x86/"
+        ;;
+    *) echo "unknown OS:" $(uname) >&2 && exit 1;;
+esac
+
+run_go "$@"