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Simplify command line processing by adding a 'with-files' macro.

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saul 2014-03-23 20:36:06 -04:00 committed by Jehan
parent cf3b6903c0
commit b6611b94ad
1 changed files with 38 additions and 0 deletions
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38
plug-ins/script-fu/scripts/script-fu-util.scm
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@ -44,3 +44,41 @@
)
)
; Allow command line usage of GIMP such as:
;
; gimp -i -b '(with-files "*.png" <body>)'
;
; where <body> is the code that handles whatever processing you want to
; perform on the files. There are three variables that are available within
; the <body>: 'basename', 'image', and 'layer'. The 'basename' is the
; name of the file with its extension removed, while the other two
; variables are self-explanatory. You basically write your code as though
; it were processing a single 'image' and the 'with-files' macro applies
; it to all of the files matching the pattern.
;
; For example, to invert the colors of all of the PNG files in the
; start directory:
;
; gimp -i -b '(with-files "*.png" (gimp-invert layer) \
; (gimp-file-save 1 image layer \
; (string-append basename ".png") \
; (string-append basename ".png") ))'
(define-macro (with-files pattern . body)
(let ((loop (gensym))
(filenames (gensym))
(filename (gensym)))
`(begin
(let ,loop ((,filenames (cadr (file-glob ,pattern 1))))
(unless (null? ,filenames)
(let* ((,filename (car ,filenames))
(image (catch #f (car (gimp-file-load RUN-NONINTERACTIVE
,filename
,filename ))))
(layer (if image (car (gimp-image-get-active-layer image)) #f))
(basename (unbreakupstr (butlast (strbreakup ,filename ".")) ".")))
(when image
,@body
(gimp-image-delete image)))
(,loop (cdr ,filenames))))
(gimp-quit 0))))