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Customize starting directory for utop #472

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Customize starting directory for utop #472

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d5b3774
Configurable start directory for utop
benbellick Dec 12, 2023
cb90551
catch case when `project-current` is nil
benbellick Dec 13, 2023
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27 changes: 24 additions & 3 deletions src/top/utop.el
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Original file line number Diff line number Diff line change
Expand Up @@ -75,6 +75,18 @@ with Emacs to provide an enhanced environment."
:type 'string
:safe 'stringp)

(defcustom utop-starting-directory 'current-directory
"Directory in which utop will be started.

Can be the `current-directory' (default) to use the current buffer's directory or
`project-root' to use the project root as implied by project.el. For most
users, `current-directory' is completely sufficient.
However, if using an .ocamlinit file in the root directory,
it may be desirable to run the project from the root directory."

:type '(choice (const :tag "Project root" project-root)
(const :tag "Current directory" current-directory)))

(defcustom utop-edit-command t
"Whether to read the command from the minibuffer before running utop.

Expand Down Expand Up @@ -1073,9 +1085,18 @@ defaults to 0."
;; Set the state to done to allow utop to be restarted if
;; start-process fails
(setq utop-state 'done)

;; Create the sub-process
(setq utop-process (apply 'start-process "utop" (current-buffer) (car arguments) (cdr arguments)))
(let ((default-directory
(cond ((eq utop-starting-directory 'project-root)
(if (project-current)
(project-root (project-current))
(error "`utop-starting-directory' is set to project-root but not currently inside a project")))
((eq utop-starting-directory 'current-directory)
default-directory)
(t
(error "Wrong value for `utop-starting-directory', please check this variable documentation and set it to a proper value")))))

;; Create the sub-process
(setq utop-process (apply 'start-process "utop" (current-buffer) (car arguments) (cdr arguments))))

;; Set the initial state: we are waiting for ocaml to send the
;; initial prompt
Expand Down