Add "pgindent" rule for make to run pgindent

Makefile

@@ -3,7 +3,9 @@ include Makefile.common.mk
 
 RELEASE_SQL      = $(EXTENSION)--$(PGSPHERE_VERSION).sql
 USE_PGXS         = 1
-USE_HEALPIX      =? 1
+USE_HEALPIX     ?= 1
+PGINDENT        ?= pgindent
+PGBSDINDENT     ?= pg_bsd_indent
 
 # the base dir name may be changed depending on git clone command
 SRC_DIR = $(shell basename $(shell pwd))
@@ -223,3 +225,27 @@ endif
 dist : clean sparse.c sscan.c
 	find . -name '*~' -type f -exec rm {} \;
 	cd .. && tar --transform s/$(SRC_DIR)/pgsphere-$(PGSPHERE_VERSION)/ --exclude CVS --exclude .git -czf pgsphere-$(PGSPHERE_VERSION).tar.gz $(SRC_DIR) && cd -
+
+# To use pgindent, set the PATH environment variable to include the directories
+# containing the binaries pgindent and pg_bsd_indent. It is important to
+# utilize a specific version of pg_bsd_indent, which sources can be found
+# in the <postgresql>/src/tools/pg_bsd_indent directory, where <postgresql>
+# is the root directory of the PostgreSQL project source tree.
+#
+# The sources of the utilities can be found in the following directories:
+# - <postgresql>/src/tools/pgindent
+# - <postgresql>/src/tools/pg_bsd_indent
+#
+# pgindent-typedefs.list should be updated every time after implementing
+# new types and introducing new typedefs in the code. For details how
+# to update pgindent-typedefs.list and for other information about pgindent,
+# please, read the doc: <postgresql>/src/tools/pgindent/README.
+#
+# pgindent-excludes.list is used to specify files to be ignored.
+#
+pgindent:
+	$(PGINDENT) \
+		--typedefs=pgindent-typedefs.list \
+		--excludes=pgindent-excludes.list \
+		--indent=${PGBSDINDENT} \
+		src

pgindent-excludes.list

@@ -0,0 +1 @@
+pgs_process_moc.h

pgindent-typedefs.list

@@ -0,0 +1,236 @@
+align_val_t
+allocator_type
+__alloc_rebind
+ArrayType
+AttrDefault
+AttrNumber
+_Base_ptr
+BlockNumber
+Box3D
+BpChar
+bpoint
+BrinDesc
+BrinOpcInfo
+brin_serialize_callback_type
+BrinValues
+__builtin_va_list
+_Char_alloc_type
+char_type
+CommonEntry
+__compar_fn_t
+ConsiderSplitContext
+_Const_Base_ptr
+__const_iterator
+const_iterator
+_Const_Link_type
+const_pointer
+ConstrCheck
+const_reference
+const_reverse_iterator
+const_void_pointer
+coord_t
+CPoint
+Datum
+difference_type
+_DistanceType
+div_t
+DomainConstraintCache
+double_t
+__dso_handle
+__enable_if_t
+false>
+false_type
+__FILE
+FILE
+first_type
+flex_int16_t
+flex_uint8_t
+float4
+float8
+float_t
+FmgrInfo
+fmNodePtr
+FormData_pg_attribute
+__fpos_t
+fpos_t
+FunctionCallInfo
+GISTENTRY
+GistEntryVector
+GISTPageOpaque
+GISTPageOpaqueData
+GIST_SPLITVEC
+GiSTSPointKey
+__gnuc_va_list
+Healpix_Base2
+hpint64
+insert_return_type
+int16
+__int16_t
+int16_t
+int32
+__int32_t
+int32_t
+int64
+__int64_t
+int64_t
+int8
+__int8_t
+int8_t
+int_fast16_t
+int_fast32_t
+int_fast64_t
+int_fast8_t
+__int_least16_t
+int_least16_t
+__int_least32_t
+int_least32_t
+__int_least64_t
+int_least64_t
+__int_least8_t
+int_least8_t
+__intmax_t
+intmax_t
+intptr_t
+int_type
+_IO_lock_t
+iostate
+ItemIdData
+iterator
+iterator_category
+iterator_type
+key_compare
+key_type
+layout_vec
+ldiv_t
+_Link_type
+lldiv_t
+LocationIndex
+__make_not_void
+map_const_iter
+map_iterator
+mapped_type
+map_rev_iter
+max_align_t
+__mbstate_t
+mbstate_t
+MemoryContext
+moc_interval
+moc_map
+moc_map_entry
+moc_out_data
+moc_tree_entry
+NameData
+_Node_allocator
+NodeTag
+node_type
+NullableDatum
+nullptr_t
+__off64_t
+OffsetNumber
+__off_t
+Oid
+ostream
+__ostream_type
+other
+output_map
+Page
+PageGistNSN
+PageHeader
+PageHeaderData
+PageXLogRecPtr
+Pg_finfo_record
+PGFunction
+Pg_magic_struct
+pgs_error_handler
+phasevec
+Point
+Point3D
+__pointer
+pointer
+Pointer
+ptrdiff_t
+__ptr_rebind
+rebind
+rebind_alloc
+reference
+Relation
+_Rep_type
+reverse_iterator
+rintv_iter
+rnode_iter
+rtype
+SBOX
+SCIRCLE
+second_type
+_Self
+SELLIPSE
+SEuler
+Size
+size_t
+size_type
+SLine
+Smoc
+SPATH
+SplitInterval
+SPoint
+SPOLY
+StrategyNumber
+streamsize
+string
+__sv_type
+t_ang
+tdiff
+text
+_Tp_alloc_type
+TransactionId
+true_type
+tsize
+TupleConstr
+TupleDesc
+__type
+type
+TypeCacheEntry
+uchar
+uint16
+__uint16_t
+uint16_t
+uint32
+__uint32_t
+uint32_t
+uint64
+__uint64_t
+uint64_t
+uint8
+__uint8_t
+uint8_t
+uint_fast16_t
+uint_fast32_t
+uint_fast64_t
+uint_fast8_t
+__uint_least16_t
+uint_least16_t
+__uint_least32_t
+uint_least32_t
+__uint_least64_t
+uint_least64_t
+__uint_least8_t
+uint_least8_t
+__uintmax_t
+uintmax_t
+uintptr_t
+va_list
+value_type
+varattrib_4b
+vec3
+Vector3D
+wctrans_t
+wctype_t
+wint_t
+YY_BUFFER_STATE
+YY_CHAR
+yy_size_t
+yy_state_type
+YYSTYPE
+yytype_int16
+yytype_int8
+yytype_uint8