From 56be77ac5094089322cef30ed5816ce25e41d9e6 Mon Sep 17 00:00:00 2001
From: Christopher Dilks <c-dilks@users.noreply.github.com>
Date: Sat, 17 Aug 2024 20:58:04 -0400
Subject: [PATCH] build: switch to Meson

---
 extensions/dataframes/meson.build | 45 ++++++++++++++++++++++++
 hipo4/meson.build                 | 57 +++++++++++++++++++++++++++++++
 meson.build                       | 46 +++++++++++++++++++++++++
 meson.options                     |  1 +
 subprojects/lz4.wrap              | 12 +++++++
 5 files changed, 161 insertions(+)
 create mode 100644 extensions/dataframes/meson.build
 create mode 100644 hipo4/meson.build
 create mode 100644 meson.build
 create mode 100644 meson.options
 create mode 100644 subprojects/lz4.wrap

diff --git a/extensions/dataframes/meson.build b/extensions/dataframes/meson.build
new file mode 100644
index 0000000..782ee3e
--- /dev/null
+++ b/extensions/dataframes/meson.build
@@ -0,0 +1,45 @@
+dataframe_headers = files('RHipoDS.hxx')
+dataframe_sources = files('RHipoDS.cxx')
+dataframe_linkdef = files('RHipoDS_LinkDef.h')
+
+# ROOT stuff
+ROOT_config = find_program('root-config')
+ROOT_cling  = find_program('rootcling')
+ROOT_libdir = run_command(ROOT_config, '--libdir', check: true).stdout().strip()
+ROOT_incdir = run_command(ROOT_config, '--incdir', check: true).stdout().strip()
+ROOT_inc    = include_directories(ROOT_incdir)
+
+# generate ROOT dictionary
+dataframe_dict    = 'HipoDataFrame_Dict.cxx'
+dataframe_lib_file = meson.current_build_dir() / 'libHipoDataFrame.so' # FIXME: file extension is platform dependent
+dataframe_dict_tgt = custom_target(
+  'HipoDataFrameDict',
+  input: dataframe_headers + hipo_headers + hipo_sources + [ dataframe_linkdef ],
+  output: [ dataframe_dict ],
+  command: [
+    ROOT_cling,
+    '-v2',
+    '-f', meson.current_build_dir() / dataframe_dict,
+    '-s', dataframe_lib_file,
+    '-rml', fs.name(dataframe_lib_file),
+    '-rmf', fs.parent(dataframe_lib_file) / fs.stem(dataframe_lib_file) + '.rootmap',
+    lz4_preproc_def,
+    '-I' + ROOT_incdir,
+    '-I' + hipo_incdir,
+    ] + dataframe_sources + dataframe_linkdef,
+)
+
+# library
+dataframe_lib = library(
+  'HipoDataFrame',
+  dataframe_sources + [ dataframe_dict_tgt[0] ],
+  include_directories: [ hipo_inc, ROOT_inc ],
+  link_with: [ hipo_lib ],
+  link_args: [ '-L' + ROOT_libdir, '-lCore', '-lROOTDataFrame', '-lROOTVecOps'],
+  build_rpath: ROOT_libdir,
+  cpp_args: [ '-Wno-sign-compare' ], # FIXME: fix these warnings
+  install: true
+)
+install_headers(dataframe_headers, subdir: meson.project_name())
+project_libs += dataframe_lib
+
diff --git a/hipo4/meson.build b/hipo4/meson.build
new file mode 100644
index 0000000..2c6307e
--- /dev/null
+++ b/hipo4/meson.build
@@ -0,0 +1,57 @@
+hipo_sources = files(
+  'bank.cpp',
+  'datastream.cpp',
+  'dictionary.cpp',
+  'event.cpp',
+  'fusion.cpp',
+  'node.cpp',
+  'parser.cpp',
+  'reader.cpp',
+  'recordbuilder.cpp',
+  'record.cpp',
+  'tuple.cpp',
+  'utils.cpp',
+  'wrapper.cpp',
+  'writer.cpp',
+)
+hipo_headers = files(
+  'bank.h',
+  'datastream.h',
+  'dictionary.h',
+  'event.h',
+  'fizika.h',
+  'fusion.h',
+  'hipoexceptions.h',
+  'json.h',
+  'jsonutil.h',
+  'node.h',
+  'parser.h',
+  'reaction.h',
+  'reader.h',
+  'recordbuilder.h',
+  'record.h',
+  'tuple.h',
+  'twig.h',
+  'utils.h',
+  'writer.h',
+)
+
+hipo_lib = library(
+  meson.project_name(),
+  hipo_sources,
+  dependencies: [lz4_dep],
+  cpp_args: [ # FIXME: fix the warnings; they are suppressed by these args
+    '-Wno-sign-compare',
+    '-Wno-unused-variable',
+    '-Wno-unused-but-set-variable',
+    '-Wno-misleading-indentation',
+    '-Wno-format',
+    ],
+  install: true
+)
+
+install_headers(hipo_headers, subdir: meson.project_name())
+project_libs += hipo_lib
+
+hipo_incdir = meson.current_source_dir()
+hipo_inc    = include_directories('.')
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..eb38087
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,46 @@
+project(
+  'hipo4',
+  'cpp',
+  meson_version: '>=1.2',
+  default_options: {
+    'cpp_std': 'c++17',
+    'buildtype': 'release',
+    'libdir': 'lib',
+    'default_library': 'both',
+    'pkgconfig.relocatable': 'true',
+  },
+  version: '4.2.0',
+)
+
+# modules
+fs = import('fs')
+pkg = import('pkgconfig')
+
+# dependencies
+lz4_dep = dependency('liblz4', method: 'pkg-config', version: '>=1.9', fallback: ['lz4', 'liblz4'])
+ROOT_dep = dependency('ROOT', method: 'cmake', version: '>=6.28', required: false)
+
+# preprocessor
+lz4_preproc_def = '-D__LZ4__'
+add_project_arguments(lz4_preproc_def, language: ['cpp'])
+
+# main project builds
+project_libs = []
+subdir('hipo4')
+
+# extensions
+if(get_option('dataframes'))
+  if(ROOT_dep.found())
+    subdir('extensions' / 'dataframes')
+  else
+    warning('ROOT dependency not found; dataframes extension will NOT be built')
+  endif
+endif
+
+# packaging
+pkg.generate(
+  name: meson.project_name(),
+  description: 'High Performance Output Data format for experimental Physics',
+  libraries: project_libs,
+  requires: [ lz4_dep ],
+)
diff --git a/meson.options b/meson.options
new file mode 100644
index 0000000..276ff08
--- /dev/null
+++ b/meson.options
@@ -0,0 +1 @@
+option('dataframes', type: 'boolean', value: true, description: 'install HIPO dataframes extension')
diff --git a/subprojects/lz4.wrap b/subprojects/lz4.wrap
new file mode 100644
index 0000000..7708a4a
--- /dev/null
+++ b/subprojects/lz4.wrap
@@ -0,0 +1,12 @@
+[wrap-file]
+directory = lz4-1.9.4
+source_url = https://github.com/lz4/lz4/archive/v1.9.4.tar.gz
+source_filename = lz4-1.9.4.tgz
+source_hash = 0b0e3aa07c8c063ddf40b082bdf7e37a1562bda40a0ff5272957f3e987e0e54b
+patch_filename = lz4_1.9.4-2_patch.zip
+patch_url = https://wrapdb.mesonbuild.com/v2/lz4_1.9.4-2/get_patch
+patch_hash = 4f33456cce986167d23faf5d28a128e773746c10789950475d2155a7914630fb
+wrapdb_version = 1.9.4-2
+
+[provide]
+liblz4 = liblz4_dep