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(defvar ledger-path "/Users/johnw/bin/ledger")
(defvar ledger-sample-doc-path "/Users/johnw/src/ledger/doc/sample.dat")
(defvar ledger-normalization-args "--args-only --columns 80")
(defun ledger-texi-update-examples ()
(interactive)
(save-excursion
(goto-char (point-min))
(while (re-search-forward "^@c \\(\\(?:sm\\)?ex\\) \\(\\S-+\\): \\(.*\\)" nil t)
(let ((section (match-string 1))
(example-name (match-string 2))
(command (match-string 3)) expanded-command
(data-file ledger-sample-doc-path)
input output)
(goto-char (match-end 0))
(forward-line)
(when (looking-at "@\\(\\(?:small\\)?example\\)")
(let ((beg (point)))
(re-search-forward "^@end \\(\\(?:small\\)?example\\)")
(delete-region beg (1+ (point)))))
(when (let ((case-fold-search nil))
(string-match " -f \\$\\([-a-z]+\\)" command))
(let ((label (match-string 1 command)))
(setq command (replace-match "" t t command)
data-file (expand-file-name (format "%s.dat" label)
temporary-file-directory))
(save-excursion
(goto-char (point-min))
(search-forward (format "@c data: %s" label))
(re-search-forward "@\\(\\(?:small\\)?example\\)")
(forward-line)
(let ((beg (point)))
(re-search-forward "@end \\(\\(?:small\\)?example\\)")
(setq input (buffer-substring-no-properties
beg (match-beginning 0)))
(with-current-buffer (find-file-noselect data-file)
(erase-buffer)
(insert input)
(save-buffer))))))
(setq expanded-command command)
(if (string-match "\\$LEDGER" expanded-command)
(setq expanded-command
(replace-match
(format "%s -f \"%s\" %s" ledger-path
data-file ledger-normalization-args)
t t expanded-command)))
(save-restriction
(narrow-to-region (point) (point))
(shell-command expanded-command t (get-buffer-create " *ldg-texi*"))
(if (= (point-min) (point-max))
(progn
(push-mark nil t)
(message "Command '%s' yielded no result at %d"
expanded-command (point))
(ding))
(setq output (buffer-string))
(goto-char (point-min))
(let ((section-name (if (string= section "smex")
"smallexample"
"example")))
(insert "@" section-name ?\n)
(goto-char (point-max))
(unless (eolp)
(insert ?\n))
(insert "@end " section-name ?\n))))
;; Update the regression test associated with this example
(with-current-buffer
(find-file-noselect
(expand-file-name (concat example-name ".test")
"../test/manual"))
(erase-buffer)
(let ((case-fold-search nil))
(if (string-match "\\$LEDGER\\s-+" command)
(setq command (replace-match "" t t command)))
(if (string-match " -f \\$\\([-a-z]+\\)" command)
(setq command (replace-match "" t t command))))
(insert command ?\n)
(insert "<<<" ?\n)
(insert input)
(insert ">>>1" ?\n)
(insert output)
(insert ">>>2" ?\n)
(insert "=== 0" ?\n)
(save-buffer)
(kill-buffer (current-buffer)))))))
(provide 'ldg-texi)
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