feat: Revendor flatcc (#592)

After dvidelabs/flatcc#289 flatcc will not
enforce alignment on empty vectors. This will let us unskip the
null_trivial case in the integration tests

CMakeLists.txt

@@ -383,6 +383,7 @@ foreach(target
                                      -Wunused-result
                                      -Wconversion
                                      -Wno-sign-conversion>)
+      target_compile_options(${target} PRIVATE -Wno-misleading-indentation)
     elseif(CMAKE_C_COMPILER_ID STREQUAL "AppleClang" OR CMAKE_C_COMPILER_ID STREQUAL
                                                         "Clang")
       target_compile_options(${target}

dev/update_fbs.sh

@@ -16,15 +16,16 @@
 # under the License.
 
 # get the .fbs files from the arrow repo
-mkdir format && cd format
+mkdir -p format && cd format
+
 curl -L https://github.com/apache/arrow/raw/main/format/Schema.fbs --output Schema.fbs
 curl -L https://github.com/apache/arrow/raw/main/format/Tensor.fbs --output Tensor.fbs
 curl -L https://github.com/apache/arrow/raw/main/format/SparseTensor.fbs --output SparseTensor.fbs
 curl -L https://github.com/apache/arrow/raw/main/format/Message.fbs --output Message.fbs
 curl -L https://github.com/apache/arrow/raw/main/format/File.fbs --output File.fbs
 
 # compile using flatcc
-flatcc --common --reader --builder --verifier --recursive --outfile ../src/nanoarrow/nanoarrow_ipc_flatcc_generated.h *.fbs
+flatcc --common --reader --builder --verifier --recursive --outfile ../../src/nanoarrow/ipc/flatcc_generated.h *.fbs
 
 # clean up
 cd ..

dev/update_vendored_flatcc.sh

@@ -15,64 +15,61 @@
 # specific language governing permissions and limitations
 # under the License.
 
-# Download a flatcc release
-curl -L https://github.com/dvidelabs/flatcc/archive/refs/tags/v0.6.1.zip --output flatcc-src.zip
-unzip flatcc-src.zip -d flatcc-src
-FLATCC_SRC_DIR=flatcc-src/`ls flatcc-src`
+REPO=`git rev-parse --show-toplevel`
+if [ -z "$REPO" ]
+then exit 1
+fi
+
+# Download flatcc
+git clone https://github.com/dvidelabs/flatcc.git
+git -C flatcc checkout bf4f67a16d85541e474f1d67b8fb64913ba72bc7
 
 # Remove previous vendored flatcc
-rm -rf ../thirdparty/flatcc
+rm -rf $REPO/thirdparty/flatcc
 
 # Create the folders we need to exist
-mkdir -p ../thirdparty/flatcc/src/runtime
-mkdir -p ../thirdparty/flatcc/include/flatcc/portable
+mkdir -p $REPO/thirdparty/flatcc/src/runtime
+mkdir -p $REPO/thirdparty/flatcc/include/flatcc/portable
 
 # The only part of the runtime we need
-cp $FLATCC_SRC_DIR/src/runtime/emitter.c \
-  $FLATCC_SRC_DIR/src/runtime/builder.c \
-  $FLATCC_SRC_DIR/src/runtime/verifier.c \
-  $FLATCC_SRC_DIR/src/runtime/refmap.c \
-  ../thirdparty/flatcc/src/runtime/
+cp flatcc/src/runtime/emitter.c \
+  flatcc/src/runtime/builder.c \
+  flatcc/src/runtime/verifier.c \
+  flatcc/src/runtime/refmap.c \
+  $REPO/thirdparty/flatcc/src/runtime/
 
 # We also need the headers for those sources. makedepend
 # can get those for us in topological order.
-pushd $FLATCC_SRC_DIR/include
 
 # List object dependencies (warns that it can't find system headers, which is OK)
 # This list is in topological order and could be used for a single-file include;
 # however, this approach is easier to support alongside a previous installation
 # of the flatcc runtime.
-makedepend -s#: -f- -- -I. -DFLATCC_PORTABLE -- 2>/dev/null \
-  ../src/runtime/emitter.c \
-  ../src/runtime/builder.c \
-  ../src/runtime/verifier.c \
-  ../src/runtime/refmap.c \
-  ../src/nanoarrow/nanoarrow_ipc.c | \
+makedepend -s#: -f- -- -Iflatcc/include -I$REPO/src -DFLATCC_PORTABLE -- 2>/dev/null \
+  `ls $REPO/thirdparty/flatcc/src/runtime/*.c` `ls $REPO/src/nanoarrow/ipc/*.c` | \
   # Remove the '<src file>.o: ' prefix
   sed 's/[^:]*: *//' | \
   # Spaces to new lines
   sed 's/ /\n/' | \
+  # Remove system headers
+  sed '/^\//d' | \
   # Only unique lines (but don't sort to preserve topological order)
   awk '!x[$0]++' | \
+  # Remove anything having to do with nanoarrow
+  sed '/nanoarrow/d' | \
   # Remove blank lines
-  sed '/^$/d' | \
-  # Or anything having to do with nanoarrow
-  sed '/nanoarrow/d' > ../../../flatcc-headers.txt
+  sed '/^$/d' > flatcc-headers.txt
 
-popd
+cat flatcc-headers.txt
 
 # Copy the headers we need. Using loops because cp --parents is not portable.
-for file in $(cat flatcc-headers.txt | sed /portable/d); do
-    cp "$FLATCC_SRC_DIR/include/$file" ../thirdparty/flatcc/include/flatcc
-done
-for file in $(cat flatcc-headers.txt | sed -n /portable/p); do
-    cp "$FLATCC_SRC_DIR/include/$file" ../thirdparty/flatcc/include/flatcc/portable;
+for file in $(cat flatcc-headers.txt); do
+    cp "$file" "$REPO/thirdparty/$file"
 done
 
 # And the license
-cp $FLATCC_SRC_DIR/LICENSE ../thirdparty/flatcc
+cp flatcc/LICENSE $REPO/thirdparty/flatcc/LICENSE
 
 # clean up
-rm -rf flatcc-src
-rm flatcc-src.zip
+rm -rf flatcc
 rm flatcc-headers.txt