render-batch: add explicit `output-paths` keyword argument

dev-gang-render
Matthew Butterick 3 years ago
parent 00a96f4fda
commit 446c5fd39f

@ -1 +1 @@
1644451419
1645490697

@ -181,8 +181,12 @@
(define current-null-output? (make-parameter #f))
(define+provide/contract (render-batch #:parallel [wants-parallel-render? #false]
#:special [special-output #false] . paths-in)
((#:parallel any/c) (#:special (or/c boolean? symbol?)) #:rest (listof pathish?) . ->* . void?)
#:special [special-output #false]
#:output-paths [output-paths-in #false] . paths-in)
(() (#:parallel any/c
#:special (or/c boolean? symbol?)
#:output-paths (or/c #false (listof pathish?)))
#:rest (listof pathish?) . ->* . void?)
;; Why not just (for-each render ...)?
;; Because certain files will pass through multiple times (e.g., templates)
;; And with render, they would be rendered repeatedly.
@ -202,6 +206,13 @@
;; but the path arguments might also include pagetrees,
;; which expand to multiple files.
;; so this keeps everything correlated correctly.
(cond
[(and output-paths-in (= (length paths-in) (length output-paths-in)))
;; explicit list of paths: create jobs directly
(for/list ([path (in-list paths-in)]
[output-path (in-list output-paths-in)])
($job path output-path))]
[else
(let loop ([paths paths-in] [sps null] [ops null])
(match paths
[(? null?)
@ -222,7 +233,7 @@
[(== (->output-path path)) path]
[_ (->output-path sp)]))
(loop rest (cons sp sps) (cons op ops))]
[_ (loop rest sps ops)])])))
[_ (loop rest sps ops)])]))]))
(cond
[(null? all-jobs) (message "[no paths to render]")]
[(eq? special-output 'dry-run) (for-each message (map $job-source all-jobs))]

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