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Bisecting a Regression
Tim van der Meij edited this page Mar 4, 2016
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11 revisions
At a minimum you will need Git and Node.js.
- Start the Git command line
- Change to a directory where you want to place PDF.js
- Run
git clone git://github.com/mozilla/pdf.js.git
- Run
cd pdf.js - Run
gulp server - Open a browser and go to
http://localhost:8080/web/viewer.html
- Open a browser and go to
http://<yourserver>/pdf.js/web/viewer.html
- Download the bad PDF and open it with the above viewer (using, for example, the Open File button in the toolbar) and verify that the PDF is broken.
- Mark the current version as bad using
git bisect startandgit bisect bad.
- Open
resource://pdf.js/build/pdf.js - Find the commit in the line with 'PDFJS.build = '
- Find the version in the line with 'PDFJS.version = '
- A Bugzilla patch contains the commit information near
browser/extensions/pdfjs/content/build/pdf.js[e.g., see https://bug871530.bugzilla.mozilla.org/attachment.cgi?id=750657, was added3d (good), will be 869b878 (bad)]
- If you know it was good in the Beta or Aurora branch, get the bad commit ID from MXR. Find the line with 'PDFJS.build = ' and copy the value in the single quotes, e.g., 4e83123.
Aurora: http://mxr.mozilla.org/mozilla-aurora/source/browser/extensions/pdfjs/content/build/pdf.js#25
Beta: http://mxr.mozilla.org/mozilla-beta/source/browser/extensions/pdfjs/content/build/pdf.js#25
git checkout <commit ID that you found above>- Full refresh (CTRL + Shift + R) Firefox and verify that the PDF is no longer broken
- Mark it as good with
git bisect good
- Full refresh (CTRL + Shift + R) of the viewer in Firefox
- If the current version works, mark it using
git bisect good - If the current version does not work, mark it using
git bisect bad - Repeat the steps above until it converges to a single commit