[firestore] Add Firestore sdk project (#1645)

* Add Firestore project

* Firestore project docker image and build script

* Firestore project docker image and build script

* Clone Firebase from Git and build with Fuzzing

* Add a collaborator and comments for cmake version

* Moving fuzzing target to test folder

projects/firestore/Dockerfile

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+# Copyright 2018 Google Inc.
+#
+# 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.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder
+MAINTAINER varconst@google.com 
+RUN apt-get update && apt-get install -y make autoconf automake libtool wget golang
+RUN git clone --depth 1 https://github.com/firebase/firebase-ios-sdk.git
+COPY build.sh $SRC/

projects/firestore/build.sh

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+#!/bin/bash -eu
+# Copyright 2018 Google Inc.
+#
+# 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.
+#
+################################################################################
+
+# The cmake version that is available on Ubuntu 16.04 is 3.5.1. While Firestore
+# itself requires cmake 3.5, it depends on leveldb which requires cmake 3.9
+# (https://github.com/google/leveldb/blob/master/CMakeLists.txt#L5).
+# There is an open issue (https://github.com/google/leveldb/issues/607) to
+# lower the required cmake version of leveldb. Therefore, we need to download
+# a newer version of cmake until leveldb lowers the required version or a newer
+# cmake version becomes available in the OSS Fuzz environment.
+cd $WORK
+wget https://cmake.org/files/v3.12/cmake-3.12.0-Linux-x86_64.tar.gz
+tar -xzf cmake-3.12.0-Linux-x86_64.tar.gz
+rm cmake-3.12.0-Linux-x86_64.tar.gz
+
+# Build the project using cmake with FUZZING option enabled to link to OSS Fuzz
+# fuzzing library defined in ${LIB_FUZZING_ENGINE}.
+cd $SRC/firebase-ios-sdk
+mkdir build && cd build
+$WORK/cmake-3.12.0-Linux-x86_64/bin/cmake -DFUZZING=ON ..
+make -j$(nproc)
+
+# Copy fuzzing targets, dictionaries, and zipped corpora to $OUT.
+FUZZERS_DIR=Firestore/core/test/firebase/firestore/fuzzing
+find ${FUZZERS_DIR} -name '*_fuzzer' -exec cp -v '{}' $OUT ';'
+find ${FUZZERS_DIR} -name '*_fuzzer.dict' -exec cp -v '{}' $OUT ';'
+find ${FUZZERS_DIR} -name "*_fuzzer_seed_corpus" -type d -execdir zip -r ${OUT}/{}.zip {} ';'

projects/firestore/project.yaml

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+homepage: "https://firebase.google.com/docs/firestore/"
+primary_contact: "varconst@google.com"
+auto_ccs:
+  - "varconst@google.com"
+  - "minafarid@google.com"
+  - "rgowman@google.com"
+sanitizers:
+  - address
+  - undefined