feat: add completion scripts (WIP)

Makefile.am

@@ -8,7 +8,7 @@
 
 ACLOCAL_AMFLAGS = -I m4
 
-SUBDIRS = doc examples include src tests
+SUBDIRS = completions doc examples include src tests
 
 
 pkgconfig_DATA = arif.pc

completions/Makefile.am

@@ -0,0 +1,23 @@
+#
+# Copyright (C) 2023  CismonX <admin@cismon.net>
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty, provided the copyright notice and
+# this notice are preserved. This file is offered as-is, without any warranty.
+#
+
+dist_bashcompletion_DATA =
+dist_zshcompletion_DATA  =
+
+
+if INSTALL_BASH_COMPLETION
+
+  dist_bashcompletion_DATA += bash/arify
+
+endif  # INSTALL_BASH_COMPLETION
+
+if INSTALL_ZSH_COMPLETION
+
+  dist_zshcompletion_DATA += zsh/_arify
+
+endif  # INSTALL_ZSH_COMPLETION

completions/bash/arify

@@ -0,0 +1,5 @@
+_arify()
+{
+}
+
+complete -F _arify arify

completions/zsh/_arify

@@ -0,0 +1 @@
+#compdef arify

configure.ac

@@ -68,6 +68,22 @@ ARIF_ARG_ENABLE([arify], [yes], [the arify command line tool], [], [
 ])
 AM_CONDITIONAL([BUILD_ARIFY], [test x${enable_arify} != xno])
 
+ARIF_ARG_WITHDIR([bashcompletion],
+        ['$(datadir)/bash-completion/completions'], [bash completion],
+[
+    AS_VAR_SET([with_bashcompletiondir], [no])
+])
+AM_CONDITIONAL([INSTALL_BASH_COMPLETION],
+        [test x${with_bashcompletiondir} != xno])
+
+ARIF_ARG_WITHDIR([zshcompletion],
+        ['$(datadir)/zsh/site-functions'], [zsh completion],
+[
+    AS_VAR_SET([with_zshcompletiondir], [no])
+])
+AM_CONDITIONAL([INSTALL_ZSH_COMPLETION],
+        [test x${with_zshcompletiondir} != xno])
+
 # -- Checks for compiler builtins and attributes --
 
 ARIF_TRY_APPLY([AX_GCC_BUILTIN], [__builtin_unreachable])
@@ -95,6 +111,7 @@ AC_CHECK_FUNCS([atexit memchr strcasecmp])
 PKG_INSTALLDIR()
 AC_CONFIG_FILES([
     Makefile
+    completions/Makefile
     doc/Makefile
     examples/Makefile
     include/Makefile

m4/arif_ac.m4

@@ -33,6 +33,38 @@ AC_DEFUN([ARIF_ARG_ENABLE], [
     m4_popdef([enable_var_])
 ])
 
+dnl
+dnl  ARIF_ARG_WITHDIR(name, default-value, description, [action-if-not-given],
+dnl                   [action-if-with], [action-if-without])
+dnl
+dnl  Provides an option to specify a custom non-standard directory where some
+dnl  objects can be installed to.
+dnl
+AC_DEFUN([ARIF_ARG_WITHDIR], [
+    m4_pushdef([withdir_var_], [with_]m4_translit([$1], [-+.], [___])[dir])
+    AC_MSG_CHECKING(m4_normalize([for $3 directory]))
+    AC_ARG_WITH([$1dir], m4_normalize([
+        AS_HELP_STRING([--with-$1dir[[=$2]]], [$3 directory])
+    ]), [
+        AS_VAR_IF(withdir_var_, [yes], [
+            AS_VAR_SET(withdir_var_, [$2])
+        ])
+    ], [
+        $4
+        AS_VAR_IF(withdir_var_, [yes], [
+            AS_VAR_SET(withdir_var_, [$2])
+        ])
+    ])
+    AS_VAR_IF(withdir_var_, [no], [
+        AC_MSG_RESULT([no])
+        $5
+    ], [
+        AC_SUBST([$1dir], "${withdir_var_}")
+        AC_MSG_RESULT(${withdir_var_})
+        $6
+    ])
+    m4_popdef([withdir_var_])
+])
 
 dnl
 dnl  ARIF_CHECK_PKG(package, version, package-name, [action-if-not-given],