Improved Eclipse support for the Bazel project

Now the paths are 100% determined using Bazel query. To adapt to
another project, change the variables at the top of the
setup-eclipse.sh file. It also handles correctly java_plugins now.

Because we must do queries on the full workspace, it is not easy to
embed in a bazel build. I made a prototype for it but it is really
impractical.

--
MOS_MIGRATED_REVID=91580472

1 files changed, 160 insertions, 0 deletions

diff --git a/scripts/eclipse-generate.sh b/scripts/eclipse-generate.sh
new file mode 100755
index 0000000000..e53355055c
--- /dev/null
+++ b/scripts/eclipse-generate.sh
@@ -0,0 +1,160 @@
+#!/bin/bash
+# Copyright 2015 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.
+#
+# Generates eclipse files for Bazel
+
+set -eu
+
+progname=$0
+function usage() {
+    echo "Usage: $progname command args..." >&2
+    echo "Possible commands are:" >&2
+    echo "    classpath java_paths lib_paths jre output_path" >&2
+    echo "    factorypath project_name plugin_paths" >&2
+    echo "    project project_name" >&2
+    echo "    apt_settings output_path" >&2
+    exit 1
+}
+
+function read_entry() {
+    if [[ -e "${1// /_}" ]]; then
+        cat "$1"
+    else
+        echo "$1"
+    fi
+}
+
+function generate_classpath() {
+    if [[ "$#" != 4 ]]; then
+        usage
+    fi
+
+    java_paths="$(read_entry "$1")"
+    lib_paths="$(read_entry "$2")"
+    jre="$3"
+    output_path="$4"
+
+    cat <<EOF
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+EOF
+
+    for path in $java_paths; do
+        echo "    <classpathentry kind=\"src\" path=\"$path\"/>"
+    done
+
+    for path_pair in $lib_paths; do
+        path_arr=(${path_pair//:/ })
+        jar=${path_arr[0]}
+        source_path=${path_arr[1]-}
+        if [ -n "${source_path}" ]; then
+            echo "    <classpathentry kind=\"lib\" path=\"${jar}\" sourcepath=\"${source_path}\"/>"
+        else
+            echo "    <classpathentry kind=\"lib\" path=\"${jar}\"/>"
+        fi
+    done
+
+    # Write the end of the .classpath file
+    cat <<EOF
+    <classpathentry kind="output" path="${output_path}"/>
+    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/${jre}">
+      <accessrules>
+        <accessrule kind="accessible" pattern="**"/>
+      </accessrules>
+    </classpathentry>
+</classpath>
+EOF
+}
+
+function generate_factorypath() {
+    if [ "$#" != 2 ]; then
+        usage
+    fi
+    project_name="$1"
+    plugin_paths="$(read_entry "$2")"
+
+    cat <<EOF
+<?xml version="1.0" encoding="UTF-8"?>
+<factorypath>
+EOF
+
+    for path in $plugin_paths; do
+        echo "    <factorypathentry kind=\"WKSPJAR\" id=\"/${project_name}/${path}\" enabled=\"true\" runInBatchMode=\"false\" />"
+    done
+
+    # Write the end of the .factorypath file
+    cat <<EOF
+</factorypath>
+EOF
+}
+
+function generate_project() {
+    if [ "$#" != 1 ]; then
+        usage
+    fi
+    project_name=$1
+    cat <<EOF
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+    <name>${project_name}</name>
+    <comment></comment>
+    <projects>
+    </projects>
+    <buildSpec>
+        <buildCommand>
+            <name>org.eclipse.jdt.core.javabuilder</name>
+            <arguments>
+            </arguments>
+        </buildCommand>
+    </buildSpec>
+    <natures>
+        <nature>org.eclipse.jdt.core.javanature</nature>
+    </natures>
+</projectDescription>
+EOF
+}
+
+function generate_apt_settings() {
+    if [ "$#" != 1 ]; then
+        usage
+    fi
+    output_path=$1
+    cat <<EOF
+eclipse.preferences.version=1
+org.eclipse.jdt.apt.aptEnabled=true
+org.eclipse.jdt.apt.genSrcDir=${output_path}
+org.eclipse.jdt.apt.reconcileEnabled=true
+EOF
+}
+
+command=$1
+shift
+case "${command}" in
+    classpath)
+        generate_classpath "$@"
+        ;;
+    factorypath)
+        generate_factorypath "$@"
+        ;;
+    project)
+        generate_project "$@"
+        ;;
+    apt_settings)
+        generate_apt_settings "$@"
+        ;;
+    *)
+        usage
+        ;;
+esac