tools/emacs/trybot.el

   1 ; To use this,
   2 ; 1) Add to init.el:
   3 ;    (setq-default chrome-root "/path/to/chrome/src/")
   4 ;    (add-to-list 'load-path (concat chrome-root "tools/emacs"))
   5 ;    (require 'trybot)
   6 ; 2) Run on trybot output:
   7 ;    M-x trybot
   8 ;
   9 ; To hack on this,
  10 ; M-x eval-buffer
  11 ; M-x trybot-test-win  or  M-x trybot-test-mac
  12
  13 (defvar chrome-root nil
  14   "Path to the src/ directory of your Chrome checkout.")
  15
  16 (defun get-chrome-root ()
  17   (or chrome-root default-directory))
  18
  19 ; Hunt down from the top, case correcting each path component as needed.
  20 ; Currently does not keep a cache.  Returns nil if no matching file can be
  21 ; figured out.
  22 (defun case-corrected-filename (filename)
  23   (save-match-data
  24     (let ((path-components (split-string filename "/"))
  25           (corrected-path (file-name-as-directory (get-chrome-root))))
  26       (mapc
  27        (function
  28         (lambda (elt)
  29           (if corrected-path
  30               (let ((next-component
  31                      (car (member-ignore-case
  32                            elt (directory-files corrected-path)))))
  33                 (setq corrected-path
  34                       (and next-component
  35                            (file-name-as-directory
  36                             (concat corrected-path next-component))))))))
  37        path-components)
  38       (if corrected-path
  39           (file-relative-name (directory-file-name corrected-path)
  40                               (get-chrome-root))
  41         nil))))
  42
  43 (defun trybot-fixup-win ()
  44   "Fix up Windows-specific output."
  45
  46   ; Fix Windows paths ("d:\...\src\").
  47   (save-excursion
  48     ; This regexp is subtle and rather hard to read. :~(
  49     ; Use regexp-builder when making changes to it.
  50     (while (re-search-forward
  51             (concat
  52              ; First part: path leader, either of the form
  53              ;   e:\...src\  or  ..\
  54              "\\(^.:\\\\.*\\\\src\\\\\\|\\.\\.\\\\\\)"
  55              ; Second part: path, followed by error message marker.
  56              "\\(.*?\\)[(:]") nil t)
  57       (replace-match "" nil t nil 1)
  58       ; Line now looks like:
  59       ;  foo\bar\baz.cc error message here
  60       ; We want to fixup backslashes in path into forward slashes,
  61       ; without modifying the error message - by matching up to the
  62       ; first colon above (which will be just beyond the end of the
  63       ; filename) we can use the end of the match as a limit.
  64       (subst-char-in-region (point) (match-end 0) ?\\ ?/)
  65       ; See if we can correct the file name casing.
  66       (let ((filename (buffer-substring (match-beginning 2) (match-end 2))))
  67         (if (and (not (file-exists-p filename))
  68                  (setq filename (case-corrected-filename filename)))
  69             (replace-match filename t t nil 2))))))
  70
  71 (defun trybot-fixup-maclin ()
  72   "Fix up Mac/Linux output."
  73   (save-excursion
  74     (while (re-search-forward "^/b/build/[^ ]*/src/" nil t)
  75       (replace-match ""))))
  76
  77 (defun trybot-fixup (type-hint)
  78   "Parse and fixup the contents of the current buffer as trybot output."
  79
  80   ; XXX is there something I should so so this stuff doesn't end up on the
  81   ; undo stack?
  82
  83   ;; Fixup paths.
  84   (cd (get-chrome-root))
  85
  86   (goto-char (point-min))
  87
  88   ;; Fix up path references.
  89   (cond ((eq type-hint 'win) (trybot-fixup-win))
  90         ((eq type-hint 'mac) (trybot-fixup-maclin))
  91         ((eq type-hint 'linux) (trybot-fixup-maclin))
  92         (t (trybot-fixup-win) (trybot-fixup-maclin)))
  93
  94   (compilation-mode))
  95
  96 (defun trybot-get-new-buffer ()
  97   "Get a new clean buffer for trybot output."
  98   ; Use trybot-buffer-name if available; otherwise, "*trybot*".
  99   (let ((buffer-name (if (boundp 'trybot-buffer-name)
 100                          trybot-buffer-name
 101                        "*trybot*")))
 102     (let ((old (get-buffer buffer-name)))
 103       (when old (kill-buffer old)))
 104     (get-buffer-create buffer-name)))
 105
 106 (defun trybot-fetch (type-hint url)
 107   "Fetch a URL and postprocess it as trybot output."
 108
 109   (let ((on-fetch-completion
 110          (lambda (process state)
 111            (switch-to-buffer (process-buffer process))
 112            (when (equal state "finished\n")
 113              (trybot-fixup (process-get process 'type-hint)))))
 114         (command (concat "curl -s " (shell-quote-argument url)
 115                          ; Pipe it through the output shortener.
 116                          (cond
 117                           ((eq type-hint 'win)
 118                            (concat " | " (get-chrome-root)
 119                                    "build/sanitize-win-build-log.sh"))
 120                           ((eq type-hint 'mac)
 121                            (concat " | " (get-chrome-root)
 122                                    "build/sanitize-mac-build-log.sh"))))))
 123
 124     ; Start up the subprocess.
 125     (let* ((coding-system-for-read 'utf-8-dos)
 126            (buffer (trybot-get-new-buffer))
 127            (process (start-process-shell-command "curl" buffer command)))
 128       ; Attach the type hint to the process so we can get it back when
 129       ; the process completes.
 130       (process-put process 'type-hint type-hint)
 131       (set-process-query-on-exit-flag process nil)
 132       (set-process-sentinel process on-fetch-completion))))
 133
 134 (defun trybot-test (type-hint filename)
 135   "Load the given test data filename and do the trybot parse on it."
 136
 137   (let ((trybot-buffer-name "*trybot-test*")
 138         (url (concat "file://" (get-chrome-root) "tools/emacs/" filename)))
 139     (trybot-fetch type-hint url)))
 140
 141 (defun trybot-test-win ()
 142   "Load the Windows test data and do the trybot parse on it."
 143   (interactive)
 144   (trybot-test 'win "trybot-windows.txt"))
 145 (defun trybot-test-mac ()
 146   "Load the Mac test data and do the trybot parse on it."
 147   (interactive)
 148   (trybot-test 'mac "trybot-mac.txt"))
 149 (defun trybot-test-linux ()
 150   "Load the Linux test data and do the trybot parse on it."
 151   (interactive)
 152   (trybot-test 'linux "trybot-linux.txt"))
 153
 154 (defun trybot (url)
 155   "Fetch a trybot URL and fix up the output into a compilation-mode buffer."
 156   (interactive "sURL to trybot stdout (leave empty to use clipboard): ")
 157
 158   ;; Yank URL from clipboard if necessary.
 159   (when (= (length url) 0)
 160     (with-temp-buffer
 161       (clipboard-yank)
 162       (setq url (buffer-string))))
 163
 164   ;; Append /text to the URL to get plain text output in the common
 165   ;; case of getting a URL to the HTML build log.
 166   (when (equal "stdio" (car (last (split-string url "/"))))
 167     (setq url (concat url "/text")))
 168
 169   (let ((type-hint (cond ((string-match "/[Ww]in" url) 'win)
 170                          ((string-match "/mac/" url) 'mac)
 171                          ; Match /linux, /linux_view, etc.
 172                          ((string-match "/linux" url) 'linux)
 173                          (t 'unknown))))
 174     (trybot-fetch type-hint url)))
 175
 176 (provide 'trybot)