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; To use this,
; 1) Add to init.el:
; (setq-default chrome-root "/path/to/chrome/src/")
; (add-to-list 'load-path (concat chrome-root "tools/emacs"))
; (require 'trybot)
; 2) Run on trybot output:
; M-x trybot
;
; To hack on this,
; M-x eval-buffer
; M-x trybot-test-win or M-x trybot-test-mac
(defvar chrome-root nil
"Path to the src/ directory of your Chrome checkout.")
(defun get-chrome-root ()
(or chrome-root default-directory))
; Hunt down from the top, case correcting each path component as needed.
; Currently does not keep a cache. Returns nil if no matching file can be
; figured out.
(defun case-corrected-filename (filename)
(save-match-data
(let ((path-components (split-string filename "/"))
(corrected-path (file-name-as-directory (get-chrome-root))))
(mapc
(function
(lambda (elt)
(if corrected-path
(let ((next-component
(car (member-ignore-case
elt (directory-files corrected-path)))))
(setq corrected-path
(and next-component
(file-name-as-directory
(concat corrected-path next-component))))))))
path-components)
(if corrected-path
(file-relative-name (directory-file-name corrected-path)
(get-chrome-root))
nil))))
(defun trybot-fixup-win ()
"Fix up Windows-specific output."
; Fix Windows paths ("d:\...\src\").
(save-excursion
; This regexp is subtle and rather hard to read. :~(
; Use regexp-builder when making changes to it.
(while (re-search-forward
(concat
; First part: path leader, either of the form
; e:\...src\ or ..\
"\\(^.:\\\\.*\\\\src\\\\\\|\\.\\.\\\\\\)"
; Second part: path, followed by error message marker.
"\\(.*?\\)[(:]") nil t)
(replace-match "" nil t nil 1)
; Line now looks like:
; foo\bar\baz.cc error message here
; We want to fixup backslashes in path into forward slashes,
; without modifying the error message - by matching up to the
; first colon above (which will be just beyond the end of the
; filename) we can use the end of the match as a limit.
(subst-char-in-region (point) (match-end 0) ?\\ ?/)
; See if we can correct the file name casing.
(let ((filename (buffer-substring (match-beginning 2) (match-end 2))))
(if (and (not (file-exists-p filename))
(setq filename (case-corrected-filename filename)))
(replace-match filename t t nil 2))))))
(defun trybot-fixup-maclin ()
"Fix up Mac/Linux output."
(save-excursion
(while (re-search-forward "^/b/build/[^ ]*/src/" nil t)
(replace-match ""))))
(defun trybot-fixup (type-hint)
"Parse and fixup the contents of the current buffer as trybot output."
; XXX is there something I should so so this stuff doesn't end up on the
; undo stack?
;; Fixup paths.
(cd (get-chrome-root))
(goto-char (point-min))
;; Fix up path references.
(cond ((eq type-hint 'win) (trybot-fixup-win))
((eq type-hint 'mac) (trybot-fixup-maclin))
((eq type-hint 'linux) (trybot-fixup-maclin))
(t (trybot-fixup-win) (trybot-fixup-maclin)))
(compilation-mode))
(defun trybot-get-new-buffer ()
"Get a new clean buffer for trybot output."
; Use trybot-buffer-name if available; otherwise, "*trybot*".
(let ((buffer-name (if (boundp 'trybot-buffer-name)
trybot-buffer-name
"*trybot*")))
(let ((old (get-buffer buffer-name)))
(when old (kill-buffer old)))
(get-buffer-create buffer-name)))
(defun trybot-fetch (type-hint url)
"Fetch a URL and postprocess it as trybot output."
(let ((on-fetch-completion
(lambda (process state)
(switch-to-buffer (process-buffer process))
(when (equal state "finished\n")
(trybot-fixup (process-get process 'type-hint)))))
(command (concat "curl -s " (shell-quote-argument url)
; Pipe it through the output shortener.
(cond
((eq type-hint 'win)
(concat " | " (get-chrome-root)
"build/sanitize-win-build-log.sh"))
((eq type-hint 'mac)
(concat " | " (get-chrome-root)
"build/sanitize-mac-build-log.sh"))))))
; Start up the subprocess.
(let* ((coding-system-for-read 'utf-8-dos)
(buffer (trybot-get-new-buffer))
(process (start-process-shell-command "curl" buffer command)))
; Attach the type hint to the process so we can get it back when
; the process completes.
(process-put process 'type-hint type-hint)
(set-process-query-on-exit-flag process nil)
(set-process-sentinel process on-fetch-completion))))
(defun trybot-test (type-hint filename)
"Load the given test data filename and do the trybot parse on it."
(let ((trybot-buffer-name "*trybot-test*")
(url (concat "file://" (get-chrome-root) "tools/emacs/" filename)))
(trybot-fetch type-hint url)))
(defun trybot-test-win ()
"Load the Windows test data and do the trybot parse on it."
(interactive)
(trybot-test 'win "trybot-windows.txt"))
(defun trybot-test-mac ()
"Load the Mac test data and do the trybot parse on it."
(interactive)
(trybot-test 'mac "trybot-mac.txt"))
(defun trybot-test-linux ()
"Load the Linux test data and do the trybot parse on it."
(interactive)
(trybot-test 'linux "trybot-linux.txt"))
(defun trybot (url)
"Fetch a trybot URL and fix up the output into a compilation-mode buffer."
(interactive "sURL to trybot stdout (leave empty to use clipboard): ")
;; Yank URL from clipboard if necessary.
(when (= (length url) 0)
(with-temp-buffer
(clipboard-yank)
(setq url (buffer-string))))
;; Append /text to the URL to get plain text output in the common
;; case of getting a URL to the HTML build log.
(when (equal "stdio" (car (last (split-string url "/"))))
(setq url (concat url "/text")))
(let ((type-hint (cond ((string-match "/[Ww]in" url) 'win)
((string-match "/mac/" url) 'mac)
; Match /linux, /linux_view, etc.
((string-match "/linux" url) 'linux)
(t 'unknown))))
(trybot-fetch type-hint url)))
(provide 'trybot)
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