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    <p>Please present a use case. I'm sure there should be a better way to do it. If there's not, I'll update my answer.</p> <p>I imagine that running the hook on <em>every</em> file would be annoying as hell. I can run a command on any file with <kbd>C-x d !</kbd>.</p> <p>With this code:</p> <pre><code>(require 'dired-x) (global-set-key (kbd "C-x d") 'dired-jump) </code></pre> <p><kbd>C-x d</kbd> will not only open current directory with <code>dired</code>, but also jump to current file's line. With this <kbd>!</kbd> will run a command on the file. This command can be auto-completed with <kbd>TAB</kbd> which is also superior to your current solution.</p> <h2>UPD1</h2> <p>Now I see that you want to run <code>bk edit</code> only on files in the repository. Here's how you can do it:</p> <pre><code>(defvar bitkeeper-dirs '("/tmp/")) (defun bitkeeper-p (file) (reduce (lambda (a b) (or a (string-match (expand-file-name b) file))) bitkeeper-dirs :initial-value nil)) (add-hook 'find-file-hook (lambda () (let ((file (buffer-file-name))) (when (bitkeeper-p file) (read-only-mode -1) (shell-command (format "cat %s &gt; /tmp/stuff" file)))))) </code></pre> <ol> <li>You should put a list of your Bitkeeper repositories in <code>bitkeeper-dirs</code>. The current predicate just tests if the file being opened is in one of this directories.</li> <li>You could write a better predicate if you want. I can't since I don't know how Bitkeeper works. If it were git, I'd probably call <code>git status</code> and see what it returns.</li> <li>You should replace <code>"cat %s &gt; /tmp/stuff"</code> with <code>"bk edit %s"</code>. The current string is just there for testing purposes.</li> </ol> <h2>UPD2</h2> <p>In answer to </p> <blockquote> <p>The best way to test whether a file is in a bk repo is to run "bk root file" a status of 0 means its in a repo. A status of 1 means it is not.</p> </blockquote> <p>Here's the new predicate. I can't test it since I don't have Bitkeeper.</p> <pre><code>(defun bitkeeper-p (file) (string= "0" (shell-command-to-string (format "bk root %s") file))) </code></pre>
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    1. POHow to get emacs to run "bk edit" on a file before its opened?
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    1. USabo-abo
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    1. POHow to get emacs to run "bk edit" on a file before its opened?
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    1. COActually its because we are using BitKeeper, which annoyingly requires to run "bk edit" on the file before it can be edited. I wanted emacs to automatically run bk edit on the file when its opened, bonus is if emacs runs "bk edit" only on BitKeeper repo files
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    2. COThanks for the info. The question of why you want to do something can be more important than what you want to do. The title of the question is good, but if you had added the part about `bk edit` and removed the code which doesn't work, it'd be perfect.
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    3. COHello abo-abo, this works but happens after emacs marks the buffer as write protected. So in the OS the file is editable, but emacs still believes the file is un-writeable. Perhaps having it do a revert of the file would work?
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