Prepare for installed sub-projects (#1459)

* Ignore vim backup files

* Prepare for installed subprojects

This adds FIREBASE_BINARY_DIR to point to the out-of-source build
directory (which previously was passed around as FIREBASE_INSTALL_DIR).

This repurposes FIREBASE_INSTALL_DIR to point to
${FIREBASE_BINARY_DIR}/opt, and installation root for subprojects that
have an install step.

* Allow download directory to be specified

9 files changed, 11 insertions, 11 deletions

diff --git a/cmake/FindFirebaseCore.cmake b/cmake/FindFirebaseCore.cmake
index eec29dd..6e68dfb 100644
--- a/cmake/FindFirebaseCore.cmake
+++ b/cmake/FindFirebaseCore.cmake
@@ -15,7 +15,7 @@
 find_library(
   FIREBASECORE_LIBRARY
   FirebaseCore
-  PATHS ${FIREBASE_INSTALL_DIR}/Frameworks
+  PATHS ${FIREBASE_BINARY_DIR}/Frameworks
 )
 
 include(FindPackageHandleStandardArgs)
diff --git a/cmake/FindGRPC.cmake b/cmake/FindGRPC.cmake
index f594b9e..22c9655 100644
--- a/cmake/FindGRPC.cmake
+++ b/cmake/FindGRPC.cmake
@@ -15,7 +15,7 @@
 include(FindPackageHandleStandardArgs)
 include(FindZLIB)
 
-set(BINARY_DIR ${FIREBASE_INSTALL_DIR}/external/grpc)
+set(BINARY_DIR ${FIREBASE_BINARY_DIR}/external/grpc)
 
 ## ZLIB
 
diff --git a/cmake/FindLevelDB.cmake b/cmake/FindLevelDB.cmake
index b664fa8..56f10e1 100644
--- a/cmake/FindLevelDB.cmake
+++ b/cmake/FindLevelDB.cmake
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-set(binary_dir ${FIREBASE_INSTALL_DIR}/external/leveldb/src/leveldb)
+set(binary_dir ${FIREBASE_BINARY_DIR}/external/leveldb/src/leveldb)
 
 find_path(
   LEVELDB_INCLUDE_DIR leveldb/db.h
diff --git a/cmake/FindNanopb.cmake b/cmake/FindNanopb.cmake
index b5d844d..eb7dfad 100644
--- a/cmake/FindNanopb.cmake
+++ b/cmake/FindNanopb.cmake
@@ -14,7 +14,7 @@
 
 include(FindPackageHandleStandardArgs)
 
-set(BINARY_DIR ${FIREBASE_INSTALL_DIR}/external/nanopb)
+set(BINARY_DIR ${FIREBASE_BINARY_DIR}/external/nanopb)
 
 find_path(
   NANOPB_INCLUDE_DIR pb.h
diff --git a/cmake/FindProtobuf.cmake b/cmake/FindProtobuf.cmake
index 60a2e34..ae438bb 100644
--- a/cmake/FindProtobuf.cmake
+++ b/cmake/FindProtobuf.cmake
@@ -14,7 +14,7 @@
 
 include(FindPackageHandleStandardArgs)
 
-set(BINARY_DIR ${FIREBASE_INSTALL_DIR}/external/protobuf)
+set(BINARY_DIR ${FIREBASE_BINARY_DIR}/external/protobuf)
 
 find_path(
   PROTOBUF_INCLUDE_DIR google/protobuf/stubs/common.h
diff --git a/cmake/external/googletest.cmake b/cmake/external/googletest.cmake
index 24da386..f48c357 100644
--- a/cmake/external/googletest.cmake
+++ b/cmake/external/googletest.cmake
@@ -17,7 +17,7 @@ include(ExternalProject)
 ExternalProject_Add(
   googletest
 
-  DOWNLOAD_DIR ${PROJECT_BINARY_DIR}/downloads
+  DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
   DOWNLOAD_NAME googletest-1.8.0.tar.gz
   URL https://github.com/google/googletest/archive/release-1.8.0.tar.gz
   URL_HASH SHA256=58a6f4277ca2bc8565222b3bbd58a177609e9c488e8a72649359ba51450db7d8
diff --git a/cmake/external/leveldb.cmake b/cmake/external/leveldb.cmake
index dcbef6c..db8aa4c 100644
--- a/cmake/external/leveldb.cmake
+++ b/cmake/external/leveldb.cmake
@@ -44,12 +44,12 @@ else()
   ExternalProject_Add(
     leveldb
 
-    DOWNLOAD_DIR ${PROJECT_BINARY_DIR}/downloads
+    DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
     DOWNLOAD_NAME leveldb-v1.20.tar.gz
     URL https://github.com/google/leveldb/archive/v1.20.tar.gz
     URL_HASH SHA256=f5abe8b5b209c2f36560b75f32ce61412f39a2922f7045ae764a2c23335b6664
 
-    PREFIX ${PROJECT_BINARY_DIR}/external/leveldb
+    PREFIX ${FIREBASE_BINARY_DIR}/external/leveldb
 
     # LevelDB's configuration is done in the Makefile
     CONFIGURE_COMMAND ""
diff --git a/cmake/external/nanopb.cmake b/cmake/external/nanopb.cmake
index 6ca47c0..368ecf0 100644
--- a/cmake/external/nanopb.cmake
+++ b/cmake/external/nanopb.cmake
@@ -16,7 +16,7 @@ include(ExternalProject)
 
 set(
   NANOPB_PROTOC_BIN
-  ${FIREBASE_INSTALL_DIR}/external/protobuf/src/protobuf-build/${CMAKE_CFG_INTDIR}/protoc
+  ${FIREBASE_BINARY_DIR}/external/protobuf/src/protobuf-build/${CMAKE_CFG_INTDIR}/protoc
 )
 
 ExternalProject_Add(
@@ -24,7 +24,7 @@ ExternalProject_Add(
   DEPENDS
     protobuf
 
-  DOWNLOAD_DIR ${PROJECT_BINARY_DIR}/downloads
+  DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
   URL https://github.com/nanopb/nanopb/archive/nanopb-0.3.9.1.tar.gz
   URL_HASH SHA256=67460d0c0ad331ef4d5369ad337056d0cd2f900c94887628d287eb56c69324bc
 
diff --git a/cmake/external/protobuf.cmake b/cmake/external/protobuf.cmake
index acc5a96..21cfac3 100644
--- a/cmake/external/protobuf.cmake
+++ b/cmake/external/protobuf.cmake
@@ -17,7 +17,7 @@ include(ExternalProject)
 ExternalProject_Add(
   protobuf
 
-  DOWNLOAD_DIR ${PROJECT_BINARY_DIR}/downloads
+  DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
   DOWNLOAD_NAME protobuf-v3.5.11.tar.gz
   URL https://github.com/google/protobuf/archive/v3.5.1.1.tar.gz
   URL_HASH SHA256=56b5d9e1ab2bf4f5736c4cfba9f4981fbc6976246721e7ded5602fbaee6d6869