meson: add support for building versionlib

meson.build

@@ -0,0 +1,6 @@
+project('metamod', 'c', 'cpp')
+
+public_inc = include_directories('public')
+
+subdir('versionlib')
+

meson_options.txt

@@ -0,0 +1,26 @@
+option('sdks', type: 'array', choices: [
+  'csgo',
+  'hl2dm',
+  'nucleardawn',
+  'l4d2',
+  'dods',
+  'l4d',
+  'css',
+  'tf2',
+  'insurgency',
+  'sdk2013',
+  'dota',
+  'doi',
+  'orangebox',
+  'blade',
+  'episode1',
+  'bms',
+  'pvkii',
+  'mcv',
+  'darkm',
+  'swarm',
+  'bgt',
+  'eye',
+  'contagion',
+  'cs2',
+])

versionlib/meson.build

@@ -0,0 +1,46 @@
+fs = import('fs')
+metamod_version_string = fs.read('../product.version').strip()
+
+version_tag = metamod_version_string.split('-')
+
+version = version_tag[0].split('.')
+major = version[0]
+minor = version[1]
+release = version[2]
+
+tag = version_tag[1]
+
+revision = run_command('git', 'rev-list', '--count', 'HEAD', check: true).stdout().strip()
+shorthash = run_command('git', 'log', '--pretty=format:%h', '-n', '1', check: true).stdout().strip()
+product = '.'.join(major, minor, release)
+
+if tag != ''
+  product += '-' + tag
+  if tag == 'dev'
+    product += '+' + revision
+  endif
+endif
+
+metamod_version_config = configuration_data({
+  'tag': tag,
+  'shorthash': shorthash,
+  'major': major,
+  'minor': minor,
+  'release': release,
+  'product': product,
+  'revision': revision,
+})
+
+configure_file(
+  input: 'metamod_version_auto.h.in',
+  output: 'metamod_version_auto.h',
+  configuration: metamod_version_config
+)
+
+versionlib = static_library(
+  'version',
+  'versionlib.cpp',
+  include_directories: [
+    public_inc,
+  ]
+)

versionlib/metamod_version_auto.h.in

@@ -0,0 +1,16 @@
+#ifndef _METAMOD_AUTO_VERSION_INFORMATION_H_
+#define _METAMOD_AUTO_VERSION_INFORMATION_H_
+
+#define MMS_BUILD_TAG		"@tag@"
+#define MMS_BUILD_CSET		"@shorthash@"
+#define MMS_BUILD_MAJOR		"@major@"
+#define MMS_BUILD_MINOR		"@minor@"
+#define MMS_BUILD_RELEASE	"@release@"
+#define MMS_BUILD_LOCAL_REV	"@revision@"
+
+#define MMS_BUILD_UNIQUEID	"@revision@:" MMS_BUILD_CSET
+
+#define MMS_VERSION_STRING	"@product@"
+#define MMS_VERSION_FILE	@major@,@minor@,@release@,0
+
+#endif /* _METAMOD_AUTO_VERSION_INFORMATION_H_ */