feat: option to disable building examples

meson.build

@@ -53,8 +53,10 @@ project_libs = []
 subdir('hipo4')
 
 # build examples
-subdir('examples')
-if(ROOT_dep.found())
+if(get_option('build_examples'))
+  subdir('examples')
+endif
+if(ROOT_dep.found() and get_option('install_root_tools'))
   subdir('examples/root')
 endif
 

meson.options

@@ -1,5 +1,11 @@
+# examples
+option('build_examples',   type: 'boolean', value: true,  description: 'build examples; see also "install_examples"')
+option('install_examples', type: 'boolean', value: false, description: 'install examples; requires "build_examples" to be true')
+
+# ROOT extensions and tools
 option('dataframes',         type: 'boolean', value: true,  description: 'install HIPO dataframes extension')
-option('install_examples',   type: 'boolean', value: false, description: 'install examples')
 option('install_root_tools', type: 'boolean', value: true,  description: 'install ROOT tools such as "hipo_hist2root"')
-option('test_file',          type: 'string',  value: '',    description: 'sample HIPO file to use for certain tests; if unspecified, those tests will not run; must be an absolute path')
-option('test_fortran',       type: 'boolean', value: false, description: 'test Fortran example; you must have a Fortran compiler and build option "test_file" must be set')
+
+# testing
+option('test_file',    type: 'string',  value: '',    description: 'sample HIPO file to use for certain tests; if unspecified, those tests will not run; must be an absolute path')
+option('test_fortran', type: 'boolean', value: false, description: 'test Fortran example; you must have a Fortran compiler and build option "test_file" must be set')