Il s'agit d'une solution tout-en-un. Il créera et affichera un PDF à partir d'un Rnw .
Plus précisément, il:
- Enregistrez le tampon Rnw et tricotez-le,
- Appliquer un moteur LaTeX donné au fichier TeX résultant,
- Identifier l'exécutable du moteur BibTeX (par exemple biber, bibtex8),
- Exécutez le moteur BibTeX sur le fichier TeX si le fichier bib est plus récent que le fichier TeX,
- Exécutez à nouveau LaTeX, 6 Ouvrez le fichier PDF résultant dans la visionneuse désignée.
La procédure tente de quitter avec des messages informatifs si l'une des étapes ci-dessus échoue.
Une instance R sera ouverte, si nécessaire, ou l'instance actuelle est utilisée pour montrer le processus de tricotage.
La sortie LaTeX est envoyée au tampon "TeX-output", qui est également sauté en cas d'erreur de compilation.
Usage
Meta- x knit-mepour créer et visualiser le PDF.
Meta- x knit-me-clearpour supprimer les fichiers intermédiaires LaTeX et knit-me.
La bibliographie nécessite le package "biblatex", c'est-à-dire:
\usepackage[
options...
backend=ENGINE,
]{biblatex}
\addbibresource{foo.bib}
Le nom du bib-engine (par exemple bibtex, biber) est obtenu en analysant le backendmot - clé.
\addbibresourceLa commande est analysée pour obtenir le fichier de bibliographie: si elle foo.bibest plus récente que le fichier TeX, le moteur bib est exécuté. A cet égard, seule la première \addbibresourcecommande est prise en compte s'il y en a plusieurs.
Personnaliser
Pour visualiser réellement le PDF, définissez le chemin exécutable du visualiseur avec:
(setq pdf-viewer "path/to/pdf-viewer")
Utilisez éventuellement une visionneuse comme SumatraPDF , qui met automatiquement à jour le PDF lors de la recompilation et ne bloque pas le fichier ouvert empêchant de nouvelles compilations.
Le moteur LaTeX par défaut est pdflatex(supposé dans le chemin actuel). Personnalisez avec:
(setq latex-engine "newengine"
latex-args "--option-1 --option-2")
Bien sûr, vous voudrez peut-être lier knit-meet knit-me-clearà certaines touches pratiques.
Remarques
Testé sous Windows MiKTeX, avec biberet bibtex8backends et GNU Emacs 25.1.1.
Code Elisp
;; (require 'ess-site) ; assumed in your init file
(defun knit-me-clear ()
"Delete intermediate LaTeX files and run `knkt-me'.
These are based on extensions .aux, .blg, .out, .run.xml, .bbl, .log, -blx.bib"
(interactive)
(check-Rnw)
(let
((file)
(stem (file-name-sans-extension (buffer-file-name))))
(dolist (elt
(list ".aux" ".blg" ".out" ".run.xml" ".bbl" ".log" "-blx.bib"))
(setq file (concat stem elt))
(if (file-exists-p file) (delete-file file))))
(knit-me))
(defun knit-me ()
"Knit->LaTeX-engine->bibtex-engine->LaTeX-engine->View.
Default LaTeX engine is \"pdflatex\" and can be customised with `latex-engine';
default LaTeX arguments are set to nil and can be customised with `latex-args';
default PDF viewer is set to nil and can be customised with `pdf-viewer'.
Bibliography must be set via \"biblatex\" LaTeX package.
Bibliography engine is obtained from \"backend\" option in \"biblatex\" package.
A reference LaTeX bib file is obtained from the first LaTeX command \"\addbibresource{foo.bib}\".
The biblatex-engine is run if the bib file is newer of the TeX file.
If there are multiple \"\addbibresource\" only the first will be used to decide whether to run the biblatex-engine."
(interactive)
;; Default values
(defvar pdf-viewer nil)
(defvar latex-engine "pdflatex")
(defvar latex-args nil)
(check-Rnw)
;;If 1 R-proc found, associate it with buffer;
;;if many found, ask to choose one; if none found, launch and associate
(ess-force-buffer-current "Process to use: ")
;;Save Rnw buffer
(save-buffer)
(let*
(;;Set file paths
(pathstem (file-name-sans-extension (buffer-file-name)))
(namestem (file-name-nondirectory pathstem))
(cur-dir (file-name-directory pathstem))
(rnw-name (concat namestem ".Rnw"))
(tex-name (concat namestem ".tex"))
;;Create LaTeX commmand
(latex-args (concat latex-args " " namestem))
(latex-cmd (concat latex-engine " " latex-args))
;;Create knit commmand
(knit-cmd (format "require(knitr); setwd('%s'); knit('%s')" cur-dir rnw-name))
;;Get R buffer proc
(r-proc (ess-get-process))
(r-buf (ess-get-process-buffer))
;;TeX executable process and bibtex engine/file
(tex-proc)
(tex-buf)
(bibfile (bib-getfile))
(bibengine (bib-getengine))
(bibfile-updated
(file-newer-than-file-p
(concat cur-dir (file-name-nondirectory bibfile) ".bib") (concat pathstem ".tex")))
;;Command success
(success nil)
(error-msg "")
)
(setq default-directory cur-dir)
;; Exit on error
(catch 'exit-func
;;Check bibtex file and engine
(when (not bibfile)
(setq error-msg (bib-getfile t))
(throw 'exit-func nil))
(when (not bibengine)
(setq error-msg (bib-getengine t))
(throw 'exit-func nil))
;; Biber wants .bib
(let ((fail (and (string= bibengine "biber")
(string= (file-name-nondirectory bibfile) (file-name-base bibfile)))))
(setq success (not fail)))
(when (not success)
(setq error-msg
(format "biber wants \\addbibresource{%s%s}" (file-name-base bibfile) ".bib"))
(throw 'exit-func nil))
;; Knitting
(switch-to-buffer-other-window r-buf)
(message knit-cmd)
(ess-eval-linewise knit-cmd nil t nil t)
;; Foll. 3 lines are an alternative to ess-eval
;; (inferior-ess-mark-as-busy r-proc) ; knit immediately after this line
;; (process-send-string r-proc (format "cat(\"%s\");%s\n" knit-cmd knit-cmd)) ; real
;; (ess-wait-for-process r-proc nil)
;; Check for knitting results
(with-current-buffer r-buf
;; Parse last 3 lines
(let ((beg) (end) (out))
(goto-char (point-max))
(setq end (point))
(forward-line -3)
(setq beg (point))
(setq out (buffer-substring-no-properties beg end))
;; Knitting successful?
(setq success "output file: %s\n\n[1] \"%s\"\n> ")
(setq success (string= (format success tex-name tex-name) out))))
(when (not success)
(setq error-msg (concat "Unable to knit " rnw-name))
(throw 'exit-func nil))
;; First LaTeXing
(setq tex-buf (get-buffer-create "TeX-output")) ; Create output buffer or use existing
(with-current-buffer tex-buf
(buffer-disable-undo)
(erase-buffer))
(message "1st latex ...")
(send-r-mess (format "Starting LaTeX (see \"%s\")" (buffer-name tex-buf)))
(send-r-mess latex-cmd)
(setq success (= 0 (call-process latex-engine nil tex-buf t latex-args)))
(goto-char (point-max))
;; Check 1st LaTeX results
(when (not success)
(setq error-msg (concat "Unable to LaTeX " namestem))
(switch-to-buffer-other-window tex-buf)
(other-window 1)
(throw 'exit-func nil))
;; Run bibtex engine
(when bibfile-updated
(message "biblatex ...")
(send-r-mess (concat bibengine " " namestem))
(setq success (= 0 (call-process bibengine nil tex-buf t namestem)))
(goto-char (point-max))
;; Check bibtex results
(when (not success)
(setq error-msg (concat "Unable to " bibengine " " namestem))
(switch-to-buffer-other-window tex-buf)
(other-window 1)
(throw 'exit-func nil)))
;; Second LaTeXing
(message "2nd latex ...")
(send-r-mess latex-cmd)
(setq success (= 0 (call-process latex-engine nil tex-buf t latex-args)))
(goto-char (point-max))
;; Check 2nd LaTeX results
(when (not success)
(setq error-msg (concat "Unable to LaTeX " pathstem))
(switch-to-buffer-other-window tex-buf)
(other-window 1)
(throw 'exit-func nil))
;; View
(if (not pdf-viewer) (throw 'exit-func nil))
(send-r-mess "...and now the viewer")
(goto-char (point-max))
(setq success (file-exists-p pdf-viewer))
(when (not success)
(setq error-msg (concat "Can\\'t find executable " pdf-viewer))
(throw 'exit-func nil))
;; If you need viewer console output, use "(start-process "pdf-viewer" tex-buf ...";
;; but you block tex-buf buffer till the viewer is open
(start-process "pdf-viewer" nil pdf-viewer (concat namestem ".pdf")))
(if success
(if bibfile-updated (message (concat "Updated to " (file-name-nondirectory bibfile))))
(message error-msg)
(send-r-mess error-msg))))
(defun bib-getfile(&optional show-messages)
"Check if 'addbibresource' command and related file exist.
If found, return .bib file full path, else:
if SHOW-MESSAGES is nil return nil, if SHOW-MESSAGES is non-nil return related error."
(save-excursion
(goto-char (point-min))
(re-search-forward "\\\\addbibresource{\\(.+\\)}" nil t))
(let ((fmatch (match-string-no-properties 1))
(success nil)
mess)
(cond
((not fmatch) (setq mess "Missing \\addbibresource command."))
((not (file-exists-p (concat (file-name-sans-extension fmatch) ".bib")))
(setq mess (concat "Missing file: " fmatch ".bib")))
;; if no problem, sucess=message=bib-file-path
(t (setq mess (concat (file-name-directory (buffer-file-name)) fmatch)
success mess)))
(if show-messages mess success)))
(defun bib-getengine(&optional show-messages)
"Find biblatex engine.
If found, engine name, else:
if SHOW-MESSAGES is nil return nil, if SHOW-MESSAGES is non-nil return related error."
(save-excursion
(goto-char (point-min))
(let ((pack (re-search-forward "\\\\usepackage *\\(\\[[^]]*\\)\\] *{ *biblatex *}" nil t))
(bend nil)
mess)
(when pack (setq pack (match-string-no-properties 1)))
(when (and pack
(string-match "[^[:alpha:]]+backend *= *\\([^, \n]+\\)" pack))
(setq bend (match-string 1 pack)))
(cond
((not pack) (setq mess "Missing biblatex package command."))
((not bend) (setq mess "Missing biblatex backend."))
;; if no problem, sucess=message=bib-file-path
(t (setq mess bend)))
(if show-messages mess bend))))
(defun send-r-mess (mess)
"Just send MESS at the end of R console buffer"
(process-send-string (ess-get-process)
(format "cat('%s\\n')\n" mess)))
(defun check-Rnw ()
"Give error if `ess-dialect' is not \"R\""
(if (not (string= "R" ess-dialect))
(error "Not an Rnw buffer")))
rmarkdown::render(viashell-command) sur le courantbuffer-file-name, qui mettra à jour le pdf dans l'autre fenêtre.