Introduce a new common helper to add the common options for libguestfs
tools (short/long options, version, verbose, trace), and sort them.
All the OCaml-based tools had these options already, so there are no
functional changes in the interface they provide.

The only difference is that now the options are always sorted, while
some tools didn't had them like that previously: because of this, a
couple of ditto markers (as descriptions) don't match what's above them
anymore, and thus their full description is put instead.
---
 builder/cmdline.ml          | 18 +-----------------
 customize/customize_main.ml | 18 +-----------------
 dib/cmdline.ml              | 17 +----------------
 get-kernel/get_kernel.ml    | 12 ++----------
 mllib/common_utils.ml       | 19 +++++++++++++++++++
 mllib/common_utils.mli      |  6 ++++++
 resize/resize.ml            | 14 +++-----------
 sparsify/cmdline.ml         | 12 ++----------
 sysprep/main.ml             | 14 +-------------
 v2v/cmdline.ml              | 14 +++-----------
 10 files changed, 39 insertions(+), 105 deletions(-)

diff --git a/builder/cmdline.ml b/builder/cmdline.ml
index 49435ae..1537208 100644
--- a/builder/cmdline.ml
+++ b/builder/cmdline.ml
@@ -126,8 +126,6 @@ let parse_cmdline () =
     "--long",    Arg.Unit list_set_long,    " " ^ s_"Shortcut for 
--list-format short";
     "--list-format", Arg.String list_set_format,
                                             "short|long|json" ^ " " ^ s_"Set 
the format for --list (default: short)";
-    "--short-options", Arg.Unit display_short_options, " " ^ s_"List short 
options";
-    "--long-options", Arg.Unit display_long_options, " " ^ s_"List long 
options";
     "--machine-readable", Arg.Set machine_readable, " " ^ s_"Make output 
machine readable";
     "-m",        Arg.Int set_memsize,       "mb" ^ " " ^ s_"Set memory size";
     "--memsize", Arg.Int set_memsize,       "mb" ^ " " ^ s_"Set memory size";
@@ -143,26 +141,12 @@ let parse_cmdline () =
     "--smp",     Arg.Int set_smp,           "vcpus" ^ " " ^ s_"Set number of 
vCPUs";
     "--source",  Arg.String add_source,     "URL" ^ " " ^ s_"Set source URL";
     "--no-sync", Arg.Clear sync,            " " ^ s_"Do not fsync output file 
on exit";
-    "-v",        Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-    "--verbose", Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-    "-V",        Arg.Unit print_version_and_exit,
-                                            " " ^ s_"Display version and exit";
-    "--version", Arg.Unit print_version_and_exit,
-                                            " " ^ s_"Display version and exit";
-    "-x",        Arg.Unit set_trace,        " " ^ s_"Enable tracing of 
libguestfs calls";
   ] in
   let customize_argspec, get_customize_ops = Customize_cmdline.argspec () in
   let customize_argspec =
     List.map (fun (spec, _, _) -> spec) customize_argspec in
   let argspec = argspec @ customize_argspec in
-  let argspec =
-    let cmp (arg1, _, _) (arg2, _, _) =
-      let arg1 = skip_dashes arg1 and arg2 = skip_dashes arg2 in
-      compare (String.lowercase arg1) (String.lowercase arg2)
-    in
-    List.sort cmp argspec in
-  let argspec = Arg.align argspec in
-  long_options := argspec;
+  let argspec = set_standard_options argspec in
 
   let args = ref [] in
   let anon_fun s = args := s :: !args in
diff --git a/customize/customize_main.ml b/customize/customize_main.ml
index 03c97e4..459e98a 100644
--- a/customize/customize_main.ml
+++ b/customize/customize_main.ml
@@ -85,8 +85,6 @@ let main () =
     "--dryrun",  Arg.Set dryrun,            " " ^ s_"Perform a dry run";
     "--dry-run", Arg.Set dryrun,            " " ^ s_"Perform a dry run";
     "--format",  Arg.String set_format,     s_"format" ^ " " ^ s_"Set format 
(default: auto)";
-    "--long-options", Arg.Unit display_long_options, " " ^ s_"List long 
options";
-    "--short-options", Arg.Unit display_short_options, " " ^ s_"List short 
options";
     "-m",        Arg.Int set_memsize,       "mb" ^ " " ^ s_"Set memory size";
     "--memsize", Arg.Int set_memsize,       "mb" ^ " " ^ s_"Set memory size";
     "--network", Arg.Set network,           " " ^ s_"Enable appliance network 
(default)";
@@ -94,27 +92,13 @@ let main () =
     "-q",        Arg.Unit set_quiet,        " " ^ s_"Don't print log messages";
     "--quiet",   Arg.Unit set_quiet,        " " ^ s_"Don't print log messages";
     "--smp",     Arg.Int set_smp,           "vcpus" ^ " " ^ s_"Set number of 
vCPUs";
-    "-v",        Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-    "--verbose", Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-    "-V",        Arg.Unit print_version_and_exit,
-                                            " " ^ s_"Display version and exit";
-    "--version", Arg.Unit print_version_and_exit,
-                          " " ^ s_"Display version and exit";
-    "-x",        Arg.Unit set_trace,        " " ^ s_"Enable tracing of 
libguestfs calls";
   ] in
   let customize_argspec, get_customize_ops =
     Customize_cmdline.argspec () in
   let customize_argspec =
     List.map (fun (spec, _, _) -> spec) customize_argspec in
   let argspec = argspec @ customize_argspec in
-  let argspec =
-    let cmp (arg1, _, _) (arg2, _, _) =
-      let arg1 = skip_dashes arg1 and arg2 = skip_dashes arg2 in
-      compare (String.lowercase arg1) (String.lowercase arg2)
-    in
-    List.sort cmp argspec in
-  let argspec = Arg.align argspec in
-  long_options := argspec;
+  let argspec = set_standard_options argspec in
 
   let anon_fun _ = raise (Arg.Bad (s_"extra parameter on the command line")) in
   let usage_msg =
diff --git a/dib/cmdline.ml b/dib/cmdline.ml
index 2fe77da..e2f2ded 100644
--- a/dib/cmdline.ml
+++ b/dib/cmdline.ml
@@ -126,9 +126,6 @@ read the man page virt-dib(1).
     extra_packages := List.rev (string_nsplit "," arg) @ !extra_packages in
 
   let argspec = [
-    "--short-options", Arg.Unit display_short_options, " " ^ s_"List short 
options";
-    "--long-options", Arg.Unit display_long_options, " " ^ s_"List long 
options";
-
     "-p",           Arg.String append_element_path, "path" ^ " " ^ s_"Add new 
a elements location";
     "--element-path", Arg.String append_element_path, "path" ^ " " ^ s_"Add 
new a elements location";
     "--exclude-element", Arg.String append_excluded_element,
@@ -167,23 +164,11 @@ read the man page virt-dib(1).
                                                " " ^ s_"Don't delete output 
file on failure";
     "--machine-readable", Arg.Set machine_readable, " " ^ s_"Make output 
machine readable";
 
-    "-V",           Arg.Unit print_version_and_exit,  " " ^ s_"Display version 
and exit";
-    "--version",    Arg.Unit print_version_and_exit,  " " ^ s_"Display version 
and exit";
-    "-v",           Arg.Unit set_verbose,      " " ^ s_"Enable libguestfs 
debugging messages";
-    "--verbose",    Arg.Unit set_verbose,      " " ^ s_"Enable libguestfs 
debugging messages";
-    "-x",           Arg.Unit set_trace,        " " ^ s_"Enable tracing of 
libguestfs calls";
     "--debug",      Arg.Int set_debug,         "level" ^ " " ^ s_"Set debug 
level";
     "-B",           Arg.Set_string basepath,   "path" ^ " " ^ s_"Base path of 
diskimage-builder library";
   ] in
 
-  let argspec =
-    let cmp (arg1, _, _) (arg2, _, _) =
-      let arg1 = skip_dashes arg1 and arg2 = skip_dashes arg2 in
-      compare (String.lowercase arg1) (String.lowercase arg2)
-    in
-    List.sort cmp argspec in
-  let argspec = Arg.align argspec in
-  long_options := argspec;
+  let argspec = set_standard_options argspec in
 
   Arg.parse argspec append_element usage_msg;
 
diff --git a/get-kernel/get_kernel.ml b/get-kernel/get_kernel.ml
index 58193ab..8ca7ca0 100644
--- a/get-kernel/get_kernel.ml
+++ b/get-kernel/get_kernel.ml
@@ -53,7 +53,7 @@ let main () =
       prefix := Some p in
 
     let ditto = " -\"-" in
-    let argspec = Arg.align [
+    let argspec = [
       "-a",        Arg.String set_file,       s_"file" ^ " " ^ s_"Add disk 
image file";
       "--add",     Arg.String set_file,       s_"file" ^ " " ^ s_"Add disk 
image file";
       "-c",        Arg.Set_string libvirturi, s_"uri" ^ " " ^ s_"Set libvirt 
URI";
@@ -61,22 +61,14 @@ let main () =
       "-d",        Arg.String set_domain,     s_"domain" ^ " " ^ s_"Set 
libvirt guest name";
       "--domain",  Arg.String set_domain,     s_"domain" ^ " " ^ s_"Set 
libvirt guest name";
       "--format",  Arg.Set_string format,     s_"format" ^ " " ^ s_"Format of 
input disk";
-      "--short-options", Arg.Unit display_short_options, " " ^ s_"List short 
options";
-      "--long-options", Arg.Unit display_long_options, " " ^ s_"List long 
options";
       "--machine-readable", Arg.Set machine_readable, " " ^ s_"Make output 
machine readable";
       "-o",        Arg.Set_string output, s_"directory" ^ " " ^ s_"Output 
directory";
       "--output",  Arg.Set_string output,     ditto;
       "--unversioned-names", Arg.Set unversioned,
                                               " " ^ s_"Use unversioned names 
for files";
       "--prefix",  Arg.String set_prefix,     "prefix" ^ " " ^ s_"Prefix for 
files";
-      "-v",        Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-      "--verbose", Arg.Unit set_verbose,      ditto;
-      "-V",        Arg.Unit print_version_and_exit,
-                                              " " ^ s_"Display version and 
exit";
-      "--version", Arg.Unit print_version_and_exit,  ditto;
-      "-x",        Arg.Unit set_trace,        " " ^ s_"Enable tracing of 
libguestfs calls";
     ] in
-    long_options := argspec;
+    let argspec = set_standard_options argspec in
     let anon_fun _ = raise (Arg.Bad (s_"extra parameter on the command line")) 
in
     let usage_msg =
       sprintf (f_"\
diff --git a/mllib/common_utils.ml b/mllib/common_utils.ml
index 99d2098..2b7d88d 100644
--- a/mllib/common_utils.ml
+++ b/mllib/common_utils.ml
@@ -510,6 +510,25 @@ let display_long_options () =
   ) !long_options;
   exit 0
 
+let set_standard_options argspec =
+  let argspec = [
+    "--short-options", Arg.Unit display_short_options, " " ^ s_"List short 
options";
+    "--long-options", Arg.Unit display_long_options, " " ^ s_"List long 
options";
+    "-V",           Arg.Unit print_version_and_exit,
+                                               " " ^ s_"Display version and 
exit";
+    "--version",    Arg.Unit print_version_and_exit,
+                                               " " ^ s_"Display version and 
exit";
+    "-v",           Arg.Unit set_verbose,      " " ^ s_"Enable libguestfs 
debugging messages";
+    "--verbose",    Arg.Unit set_verbose,      " " ^ s_"Enable libguestfs 
debugging messages";
+    "-x",           Arg.Unit set_trace,        " " ^ s_"Enable tracing of 
libguestfs calls";
+  ] @ argspec in
+  let argspec =
+    let cmp (arg1, _, _) (arg2, _, _) = compare_command_line_args arg1 arg2 in
+    List.sort cmp argspec in
+  let argspec = Arg.align argspec in
+  long_options := argspec;
+  argspec
+
 (* Compare two version strings intelligently. *)
 let rex_numbers = Str.regexp "^\\([0-9]+\\)\\(.*\\)$"
 let rex_letters = Str.regexp_case_fold "^\\([a-z]+\\)\\(.*\\)$"
diff --git a/mllib/common_utils.mli b/mllib/common_utils.mli
index 9d1ee6a..5d93b53 100644
--- a/mllib/common_utils.mli
+++ b/mllib/common_utils.mli
@@ -122,6 +122,12 @@ val display_short_options : unit -> 'a
 val display_long_options : unit -> 'a
 (** Implements [--long-options]. *)
 
+val set_standard_options : (Arg.key * Arg.spec * Arg.doc) list -> (Arg.key * 
Arg.spec * Arg.doc) list
+(** Adds the standard libguestfs command line options to the specified ones,
+    sorting them, and setting [long_options] to them.
+
+    Returns the resulting options. *)
+
 val compare_version : string -> string -> int
 (** Compare two version strings. *)
 
diff --git a/resize/resize.ml b/resize/resize.ml
index 8ab14f7..f353158 100644
--- a/resize/resize.ml
+++ b/resize/resize.ml
@@ -189,7 +189,7 @@ let main () =
     let sparse = ref true in
 
     let ditto = " -\"-" in
-    let argspec = Arg.align [
+    let argspec = [
       "--align-first", Arg.Set_string align_first, s_"never|always|auto" ^ " " 
^ s_"Align first partition (default: auto)";
       "--alignment", Arg.Set_int alignment,   s_"sectors" ^ " " ^ s_"Set 
partition alignment (default: 128 sectors)";
       "--no-copy-boot-loader", Arg.Clear copy_boot_loader, " " ^ s_"Don't copy 
boot loader";
@@ -202,16 +202,14 @@ let main () =
       "--no-extra-partition", Arg.Clear extra_partition, " " ^ s_"Don't create 
extra partition";
       "--format",  Arg.Set_string format,     s_"format" ^ " " ^ s_"Format of 
input disk";
       "--ignore",  Arg.String (add ignores),  s_"part" ^ " " ^ s_"Ignore 
partition";
-      "--short-options", Arg.Unit display_short_options, " " ^ s_"List short 
options";
-      "--long-options", Arg.Unit display_long_options, " " ^ s_"List long 
options";
       "--lv-expand", Arg.String (add lv_expands), s_"lv" ^ " " ^ s_"Expand 
logical volume";
       "--LV-expand", Arg.String (add lv_expands), s_"lv" ^ ditto;
       "--lvexpand", Arg.String (add lv_expands), s_"lv" ^ ditto;
       "--LVexpand", Arg.String (add lv_expands), s_"lv" ^ ditto;
       "--machine-readable", Arg.Set machine_readable, " " ^ s_"Make output 
machine readable";
       "-n",        Arg.Set dryrun,            " " ^ s_"Don't perform changes";
+      "--dry-run", Arg.Set dryrun,            " " ^ s_"Don't perform changes";
       "--dryrun",  Arg.Set dryrun,            ditto;
-      "--dry-run", Arg.Set dryrun,            ditto;
       "--ntfsresize-force", Arg.Set ntfsresize_force, " " ^ s_"Force 
ntfsresize";
       "--output-format", Arg.Set_string output_format, s_"format" ^ " " ^ 
s_"Format of output disk";
       "-q",        Arg.Unit set_quiet,        " " ^ s_"Don't print the 
summary";
@@ -220,14 +218,8 @@ let main () =
       "--resize-force", Arg.String (add resizes_force), s_"part=size" ^ " " ^ 
s_"Forcefully resize partition";
       "--shrink",  Arg.String set_shrink,     s_"part" ^ " " ^ s_"Shrink 
partition";
       "--no-sparse", Arg.Clear sparse,        " " ^ s_"Turn off sparse 
copying";
-      "-v",        Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-      "--verbose", Arg.Unit set_verbose,      ditto;
-      "-V",        Arg.Unit print_version_and_exit,
-                                              " " ^ s_"Display version and 
exit";
-      "--version", Arg.Unit print_version_and_exit,  ditto;
-      "-x",        Arg.Unit set_trace,        " " ^ s_"Enable tracing of 
libguestfs calls";
     ] in
-    long_options := argspec;
+    let argspec = set_standard_options argspec in
     let disks = ref [] in
     let anon_fun s = disks := s :: !disks in
     let usage_msg =
diff --git a/sparsify/cmdline.ml b/sparsify/cmdline.ml
index b2a57c3..8cd26a4 100644
--- a/sparsify/cmdline.ml
+++ b/sparsify/cmdline.ml
@@ -55,7 +55,7 @@ let parse_cmdline () =
   let zeroes = ref [] in
 
   let ditto = " -\"-" in
-  let argspec = Arg.align [
+  let argspec = [
     "--check-tmpdir", Arg.String set_check_tmpdir,  "ignore|..." ^ " " ^ 
s_"Check there is enough space in $TMPDIR";
     "--compress", Arg.Set compress,         " " ^ s_"Compressed output format";
     "--convert", Arg.Set_string convert,    s_"format" ^ " " ^ s_"Format of 
output disk (default: same as input)";
@@ -64,22 +64,14 @@ let parse_cmdline () =
     "--ignore",  Arg.String (add ignores),  s_"fs" ^ " " ^ s_"Ignore 
filesystem";
     "--in-place", Arg.Set in_place,         " " ^ s_"Modify the disk image 
in-place";
     "--inplace", Arg.Set in_place,          ditto;
-    "--short-options", Arg.Unit display_short_options, " " ^ s_"List short 
options";
-    "--long-options", Arg.Unit display_long_options, " " ^ s_"List long 
options";
     "--machine-readable", Arg.Set machine_readable, " " ^ s_"Make output 
machine readable";
     "-o",        Arg.Set_string option,     s_"option" ^ " " ^ s_"Add qemu-img 
options";
     "-q",        Arg.Unit set_quiet,        " " ^ s_"Quiet output";
     "--quiet",   Arg.Unit set_quiet,        ditto;
     "--tmp",     Arg.Set_string tmp,        s_"block|dir|prebuilt:file" ^ " " 
^ s_"Set temporary block device, directory or prebuilt file";
-    "-v",        Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-    "--verbose", Arg.Unit set_verbose,      ditto;
-    "-V",        Arg.Unit print_version_and_exit,
-                                            " " ^ s_"Display version and exit";
-    "--version", Arg.Unit print_version_and_exit,  ditto;
-    "-x",        Arg.Unit set_trace,        " " ^ s_"Enable tracing of 
libguestfs calls";
     "--zero",    Arg.String (add zeroes),   s_"fs" ^ " " ^ s_"Zero filesystem";
   ] in
-  long_options := argspec;
+  let argspec = set_standard_options argspec in
   let disks = ref [] in
   let anon_fun s = disks := s :: !disks in
   let usage_msg =
diff --git a/sysprep/main.ml b/sysprep/main.ml
index 8b71109..c9fe2ea 100644
--- a/sysprep/main.ml
+++ b/sysprep/main.ml
@@ -131,8 +131,6 @@ let main () =
       "--enable",  Arg.String set_enable,     s_"operations" ^ " " ^ s_"Enable 
specific operations";
       "--format",  Arg.String set_format,     s_"format" ^ " " ^ s_"Set format 
(default: auto)";
       "--list-operations", Arg.Unit list_operations, " " ^ s_"List supported 
operations";
-      "--short-options", Arg.Unit display_short_options, " " ^ s_"List short 
options";
-      "--long-options", Arg.Unit display_long_options, " " ^ s_"List long 
options";
       "--mount-options", Arg.Set_string mount_opts, s_"opts" ^ " " ^ s_"Set 
mount options (eg /:noatime;/var:rw,noatime)";
       "--no-selinux-relabel", Arg.Unit (fun () -> ()),
                                               " " ^ s_"Compatibility option, 
does nothing";
@@ -140,19 +138,9 @@ let main () =
       "--operations", Arg.String set_operations, " " ^ s_"Enable/disable 
specific operations";
       "-q",        Arg.Unit set_quiet,        " " ^ s_"Don't print log 
messages";
       "--quiet",   Arg.Unit set_quiet,        " " ^ s_"Don't print log 
messages";
-      "-v",        Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-      "--verbose", Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-      "-V",        Arg.Unit print_version_and_exit,
-                                              " " ^ s_"Display version and 
exit";
-      "--version", Arg.Unit print_version_and_exit,
-                                              " " ^ s_"Display version and 
exit";
-      "-x",        Arg.Unit set_trace,        " " ^ s_"Enable tracing of 
libguestfs calls";
     ] in
     let args = basic_args @ Sysprep_operation.extra_args () in
-    let args =
-      List.sort (fun (a,_,_) (b,_,_) -> compare_command_line_args a b) args in
-    let argspec = Arg.align args in
-    long_options := argspec;
+    let argspec = set_standard_options args in
     let anon_fun _ = raise (Arg.Bad (s_"extra parameter on the command line")) 
in
     let usage_msg =
       sprintf (f_"\
diff --git a/v2v/cmdline.ml b/v2v/cmdline.ml
index df65426..0a0349c 100644
--- a/v2v/cmdline.ml
+++ b/v2v/cmdline.ml
@@ -134,7 +134,7 @@ let parse_cmdline () =
     String.concat "|" (Modules_list.output_modules ()) in
 
   let ditto = " -\"-" in
-  let argspec = Arg.align [
+  let argspec = [
     "-b",        Arg.String add_bridge,     "in:out " ^ s_"Map bridge 'in' to 
'out'";
     "--bridge",  Arg.String add_bridge,     "in:out " ^ ditto;
     "--debug-gc",Arg.Unit set_debug_gc,     " " ^ s_"Debug GC and memory 
allocations";
@@ -146,8 +146,6 @@ let parse_cmdline () =
     "-ic",       Arg.Set_string input_conn, "uri " ^ s_"Libvirt URI";
     "-if",       Arg.Set_string input_format,
     "format " ^ s_"Input format (for -i disk)";
-    "--short-options", Arg.Unit display_short_options, " " ^ s_"List short 
options";
-    "--long-options", Arg.Unit display_long_options, " " ^ s_"List long 
options";
     "--machine-readable", Arg.Set machine_readable, " " ^ s_"Make output 
machine readable";
     "-n",        Arg.String add_network,    "in:out " ^ s_"Map network 'in' to 
'out'";
     "--network", Arg.String add_network,    "in:out " ^ ditto;
@@ -163,7 +161,7 @@ let parse_cmdline () =
     "--print-source", Arg.Set print_source, " " ^ s_"Print source and stop";
     "--qemu-boot", Arg.Set qemu_boot,       " " ^ s_"Boot in qemu (-o qemu 
only)";
     "-q",        Arg.Unit set_quiet,        " " ^ s_"Quiet output";
-    "--quiet",   Arg.Unit set_quiet,        ditto;
+    "--quiet",   Arg.Unit set_quiet,        " " ^ s_"Quiet output";
     "--root",    Arg.String set_root_choice,"ask|... " ^ s_"How to choose root 
filesystem";
     "--vdsm-image-uuid",
     Arg.String add_vdsm_image_uuid, "uuid " ^ s_"Output image UUID(s)";
@@ -173,15 +171,9 @@ let parse_cmdline () =
     Arg.Set_string vdsm_vm_uuid, "uuid " ^ s_"Output VM UUID";
     "--vdsm-ovf-output",
     Arg.Set_string vdsm_ovf_output, " " ^ s_"Output OVF file";
-    "-v",        Arg.Unit set_verbose,      " " ^ s_"Enable debugging 
messages";
-    "--verbose", Arg.Unit set_verbose,      ditto;
-    "-V",        Arg.Unit print_version_and_exit,
-                                            " " ^ s_"Display version and exit";
-    "--version", Arg.Unit print_version_and_exit,  ditto;
     "--vmtype",  Arg.Set_string vmtype,     "server|desktop " ^ s_"Set vmtype 
(for RHEV)";
-    "-x",        Arg.Unit set_trace,        " " ^ s_"Enable tracing of 
libguestfs calls";
   ] in
-  long_options := argspec;
+  let argspec = set_standard_options argspec in
   let args = ref [] in
   let anon_fun s = args := s :: !args in
   let usage_msg =
-- 
2.1.0

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