Use installed ragel instead of building from source

.github/workflows/macos.yml

@@ -65,7 +65,7 @@ jobs:
             bison boost ccache double-conversion flex fmt gflags glog \
             icu4c libevent libsodium lz4 lzo ninja openssl protobuf@21 \
             range-v3 simdjson snappy thrift xz xsimd zstd libtool automake \
-            autoconf
+            autoconf ragel
 
           echo "NJOBS=`sysctl -n hw.ncpu`" >> $GITHUB_ENV
           brew unlink protobuf || echo "protobuf not installed"

.github/workflows/scheduled.yml

@@ -110,6 +110,12 @@ jobs:
 
     steps:
 
+      - name: Setup dependencies
+        run: |
+          # Install dependencies required by PR. They have not been installed in docker.
+          yum update
+          yum install -y ragel
+
       - name: Get latest commit from main
         if: ${{ github.event_name != 'schedule' }}
         working-directory: ${{ github.workspace }}

CMake/resolve_dependency_modules/hyperscan.cmake

@@ -13,54 +13,6 @@
 # limitations under the License.
 include_guard(GLOBAL)
 
-find_program(RAGEL ragel)
-if(${RAGEL} STREQUAL "RAGEL-NOTFOUND")
-  message(STATUS "Building colm from source")
-  # Install colm, required by ragel build.
-  FetchContent_Declare(
-    colm
-    URL https://github.com/adrian-thurston/colm/archive/refs/tags/0.14.7.tar.gz
-    URL_HASH
-      SHA256=06c8296cab3c660dcb0b150d5b58c10707278d34a35fe664f8ed05f4606fc079)
-  FetchContent_GetProperties(colm)
-  if(NOT colm_POPULATED)
-    FetchContent_Populate(colm)
-  endif()
-  execute_process(
-    COMMAND
-      bash -c
-      "./autogen.sh && ./configure --prefix=/usr/local/ && make && make install"
-    WORKING_DIRECTORY ${colm_SOURCE_DIR}
-    RESULT_VARIABLE result
-    OUTPUT_VARIABLE output
-    ERROR_VARIABLE output)
-
-  message(STATUS "Building ragel from source")
-  # Install ragel, required by hyperscan build.
-  FetchContent_Declare(
-    ragel
-    URL https://github.com/adrian-thurston/ragel/archive/refs/tags/7.0.4.tar.gz
-    URL_HASH
-      SHA256=0f7c3866f82ba2552f1ae1f03b94170121a0ff8bac92c8e22c531d732fd20581)
-  FetchContent_GetProperties(ragel)
-  if(NOT ragel_POPULATED)
-    FetchContent_Populate(ragel)
-  endif()
-  execute_process(
-    COMMAND
-      bash -c
-      "./autogen.sh && ./configure --with-colm=/usr/local/ --disable-manual && make && make install"
-    WORKING_DIRECTORY ${ragel_SOURCE_DIR}
-    RESULT_VARIABLE result
-    OUTPUT_VARIABLE output
-    ERROR_VARIABLE output)
-  if(result)
-    message(FATAL_ERROR "Failed to build and install ragel: ${output}")
-  endif()
-else()
-  message(STATUS "Using existing ragel for building hyperscan.")
-endif()
-
 if(DEFINED ENV{VELOX_HYPERSCAN_URL})
   set(VELOX_HYPERSCAN_SOURCE_URL "$ENV{VELOX_HYPERSCAN_URL}")
 else()

scripts/setup-centos9.sh

@@ -50,7 +50,7 @@ function install_build_prerequisites {
   dnf config-manager --set-enabled crb
   dnf update -y
   dnf_install ninja-build cmake ccache gcc-toolset-12 git wget which
-  dnf_install autoconf automake python3-devel pip libtool
+  dnf_install autoconf automake python3-devel pip libtool ragel
   pip install cmake==3.28.3
 }
 

scripts/setup-macos.sh

@@ -34,7 +34,7 @@ source $SCRIPTDIR/setup-helper-functions.sh
 NPROC=$(getconf _NPROCESSORS_ONLN)
 
 DEPENDENCY_DIR=${DEPENDENCY_DIR:-$(pwd)}
-MACOS_VELOX_DEPS="flex bison protobuf@21 icu4c boost gflags glog libevent lz4 lzo snappy xz zstd openssl libsodium libtool automake autoconf"
+MACOS_VELOX_DEPS="flex bison protobuf@21 icu4c boost gflags glog libevent lz4 lzo snappy xz zstd openssl libsodium libtool automake autoconf ragel"
 MACOS_BUILD_DEPS="ninja cmake ccache"
 FB_OS_VERSION="v2024.05.20.00"
 

scripts/setup-ubuntu.sh

@@ -88,7 +88,8 @@ function install_velox_deps_from_apt {
     bison \
     flex \
     libfl-dev \
-    tzdata
+    tzdata \
+    ragel
 }
 
 function install_fmt {