Add CLI option to specify additional packages for internal Cygwin.

master_changes.md

@@ -20,6 +20,7 @@ users)
 ## Plugins
 
 ## Init
+  * ◈ New option `opam init --cygwin-extra-packages=CYGWIN_PKGS --cygwin-internal-install`, to specify additional packages for internal Cygwin [#5930 @moyodiallo - fix #5834]
 
 ## Config report
 
@@ -123,6 +124,7 @@ users)
 
 # API updates
 ## opam-client
+  * `OpamClient.init` and `OpamClient.reinit`: now can have additional cygwin packages to install [#5930 @moyodiallo]
 
 ## opam-repository
 

src/client/opamClient.ml

@@ -850,15 +850,19 @@ let windows_checks ?cygwin_setup ?git_location config =
            OpamFilename.(Dir.to_string (dirname_dir (dirname_dir cygbin))));
     config
   in
-  let install_cygwin_tools () =
-    let packages =
+  let install_cygwin_tools packages =
+    let default_packages =
       match OpamSystem.resolve_command "git" with
       | None -> OpamInitDefaults.required_packages_for_cygwin
       | Some _ ->
         List.filter (fun c -> not OpamSysPkg.(equal (of_string "git") c))
           OpamInitDefaults.required_packages_for_cygwin
     in
-    OpamSysInteract.Cygwin.install ~packages
+    (* packages comes last so that the user can override any potential version
+       constraints in default_packages (although, with the current version of
+       setup, and with the list of default_packages in OpamInitDefaults, this at
+       present doesn't matter too much). *)
+    OpamSysInteract.Cygwin.install ~packages:(default_packages @ packages)
   in
   let header () = OpamConsole.header_msg "Unix support infrastructure" in
 
@@ -956,7 +960,7 @@ let windows_checks ?cygwin_setup ?git_location config =
         match prompt () with
         | `Abort -> OpamStd.Sys.exit_because `Aborted
         | `Internal ->
-          let cygcheck = install_cygwin_tools () in
+          let cygcheck = install_cygwin_tools [] in
           let config = success cygcheck in
           config
         | `Specify ->
@@ -975,7 +979,7 @@ let windows_checks ?cygwin_setup ?git_location config =
   let config =
     match cygwin_setup with
     | Some `no -> config
-    | (Some (`internal | `default_location | `location _) | None)
+    | (Some (`internal _ | `default_location | `location _) | None)
       as cygwin_setup ->
       if OpamSysPoll.os env = Some "win32" then
         match OpamSysPoll.os_distribution env with
@@ -995,7 +999,7 @@ let windows_checks ?cygwin_setup ?git_location config =
              header ();
              let cygcheck =
                match setup with
-               | `internal -> install_cygwin_tools ()
+               | `internal pkgs -> install_cygwin_tools pkgs
                | (`default_location | `location _ as setup) ->
                  let cygroot =
                    match setup with

src/client/opamClient.mli

@@ -28,7 +28,7 @@ val init:
   ?env_hook:bool ->
   ?completion:bool ->
   ?check_sandbox:bool ->
-  ?cygwin_setup: [ `internal | `default_location | `location of dirname | `no ] ->
+  ?cygwin_setup: [ `internal of OpamSysPkg.t list | `default_location | `location of dirname | `no ] ->
   ?git_location:(dirname, unit) either ->
   shell ->
   rw global_state * unlocked repos_state * atom list
@@ -46,7 +46,7 @@ val reinit:
   ?init_config:OpamFile.InitConfig.t -> interactive:bool -> ?dot_profile:filename ->
   ?update_config:bool -> ?env_hook:bool -> ?completion:bool -> ?inplace:bool ->
   ?check_sandbox:bool -> ?bypass_checks:bool ->
-  ?cygwin_setup: [ `internal | `default_location | `location of dirname | `no ] ->
+  ?cygwin_setup: [ `internal of OpamSysPkg.t list | `default_location | `location of dirname | `no ] ->
   ?git_location:(dirname, unit) either ->
   OpamFile.Config.t -> shell -> unit
 

src/client/opamCommands.ml

@@ -319,6 +319,16 @@ let init cli =
     else
       Term.const `none
   in
+  let cygwin_extra_packages =
+    if Sys.win32 then
+      mk_opt ~cli (cli_from ~experimental:true cli2_2)
+        ["cygwin-extra-packages"] "CYGWIN_PACKAGES"
+        "Specify additional packages to install \
+         with $(b,--cygwin-internal-install)"
+        Arg.(some (list string)) None
+    else
+      Term.const None
+  in
   let cygwin_location =
     if Sys.win32 then
       mk_opt ~cli (cli_from ~experimental:true cli2_2)
@@ -351,7 +361,8 @@ let init cli =
       interactive update_config completion env_hook no_sandboxing shell
       dot_profile_o compiler no_compiler config_file no_config_file reinit
       show_opamrc bypass_checks
-      cygwin_internal cygwin_location git_location no_git_location
+      cygwin_internal cygwin_location cygwin_extra_packages
+      git_location no_git_location
       () =
     apply_global_options cli global_options;
     apply_build_options cli build_options;
@@ -408,17 +419,28 @@ let init cli =
         OpamStd.Sys.guess_dot_profile shell >>| OpamFilename.of_string)
     in
     let cygwin_setup =
-      match cygwin_internal, cygwin_location with
-      | `internal, Some _ ->
+      let bad_arg arg1 arg2 =
         OpamConsole.error_and_exit `Bad_arguments
-          "Options --cygwin-internal-install and \
-           --cygwin-location are incompatible";
-      | `no, Some _ ->
-        OpamConsole.note "Ignoring argument --cygwin-location";
-        Some `no
-      | `none, None -> None
-      | (`default_location | `none), Some dir -> Some (`location dir)
-      | (`internal | `default_location | `no) as setup, None -> Some setup
+          "Options --%s and --%s are incompatible"
+          arg1 arg2
+      in
+      match cygwin_internal, cygwin_location, cygwin_extra_packages with
+      | `internal, Some _, _ ->
+        bad_arg "cygwin-internal-install" "cygwin-location"
+      | `default_location, _, Some _ ->
+        bad_arg "cygwin-local-install" "cygwin-extra-packages"
+      | `no, Some _, _ ->
+        bad_arg "no-cygwin-setup" "cygwin-location"
+      | `no,  _, Some _ ->
+        bad_arg "no-cygwin-setup" "cygwin-extra-packages"
+      | `none, Some _, Some _ ->
+        bad_arg "cygwin-location" "cygwin-extra-packages"
+      | (`internal | `none), None, pkgs ->
+        Some (`internal
+                (OpamStd.Option.default [] pkgs
+                 |> List.map OpamSysPkg.of_string))
+      | (`default_location | `none), Some dir, None -> Some (`location dir)
+      | (`default_location | `no) as setup, None, None -> Some setup
     in
     let git_location =
       match git_location, no_git_location with
@@ -527,7 +549,8 @@ let init cli =
           $setup_completion $env_hook $no_sandboxing $shell_opt cli
           cli_original $dot_profile_flag cli cli_original $compiler
           $no_compiler $config_file $no_config_file $reinit $show_default_opamrc
-          $bypass_checks $cygwin_internal $cygwin_location $git_location $no_git_location)
+          $bypass_checks $cygwin_internal $cygwin_location $cygwin_extra_packages
+          $git_location $no_git_location)
 
 (* LIST *)
 let list_doc = "Display the list of available packages."