Commit c01c86f5 authored by Elias Pipping's avatar Elias Pipping

Change :if-*-exists default to :supersede

The difference between :overwrite (the former default) and :supersede
is only that the latter should not lead to an error if the file does
not exist. There is plenty of support for :supersede behaviour (not
necessarily under that name) but not for :overwrite behaviour. Hence
we make it the default and add a normaliser.

Since normalisation is currently only necessary for CLISP and CLISP
only has :if-output-exists support (not :if-error-output-exists or
:if-input-does-not-exist), we only translate :if-output-exists for now.
parent 9198e77f
......@@ -398,6 +398,11 @@ argument to pass to the internal RUN-PROGRAM"
(error "Wrong specifier ~S for role ~S" specifier role)))))
(defun %normalize-if-exists (action)
(ecase action
(:supersede #+clisp :overwrite #-clisp action)
((:append :error) action)))
(defun %interactivep (input output error-output)
(member :interactive (list input output error-output)))
......@@ -419,8 +424,8 @@ argument to pass to the internal RUN-PROGRAM"
(defun %run-program (command
&rest keys
&key input (if-input-does-not-exist :error)
output (if-output-exists :overwrite)
error-output (if-error-output-exists :overwrite)
output (if-output-exists :supersede)
error-output (if-error-output-exists :supersede)
directory wait
#+allegro separate-streams
......@@ -438,6 +443,7 @@ It returns a process-info object."
(error "run-program not available"))
#+(or allegro clasp clisp clozure cmucl ecl (and lispworks os-unix) mkcl sbcl scl)
(let* ((%command (%normalize-command command))
(%if-output-exists (%normalize-if-exists if-output-exists))
(%input (%normalize-io-specifier input :input))
(%output (%normalize-io-specifier output :output))
(%error-output (%normalize-io-specifier error-output :error-output))
......@@ -474,9 +480,10 @@ It returns a process-info object."
#-clisp `(#+(or allegro lispworks) :error-output #-(or allegro lispworks) :error
#+(and allegro os-windows) `(:show-window ,(if interactive nil :hide))
#+clisp `(:if-output-exists ,%if-output-exists)
#+(or allegro clozure cmucl ecl lispworks mkcl sbcl scl)
`(:if-input-does-not-exist ,if-input-does-not-exist
:if-output-exists ,if-output-exists
:if-output-exists ,%if-output-exists
#-(or allegro lispworks) :if-error-exists
#+(or allegro lispworks) :if-error-output-exists
......@@ -861,8 +868,8 @@ It returns a process-info object."
(defun run-program (command &rest keys
&key ignore-error-status (force-shell nil force-shell-suppliedp)
(input nil inputp) (if-input-does-not-exist :error)
output (if-output-exists :overwrite)
(error-output nil error-output-p) (if-error-output-exists :overwrite)
output (if-output-exists :supersede)
(error-output nil error-output-p) (if-error-output-exists :supersede)
(element-type #-clozure *default-stream-element-type* #+clozure 'character)
(external-format *utf-8-external-format*)
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