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README.org
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README.org
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#+Title: Autoload project.el
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#+Author: Yann Esposito
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#+Date: [2019-08-19 Mon]
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Autoload securely a =project.el= file when entering a project directory.
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It uses =projectile= package.
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When entering a new project, load the =project.el= file at the root of the
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project.
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To make things safes, it check a =project.el.sig= GPG signature file and
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verify the file was signed by one of the
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=auto-load-project-trusted-gpg-key-fingerprint=.
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#+begin_src elisp
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(setq auto-load-project-trusted-gpg-key-fingerprints
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'("000011112222333344445555666677778888"))
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#+end_src
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auto-load-project.el
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auto-load-project.el
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;;; auto-load-project.el --- Auto load elisp file on project open
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;; Copyright © 2019 Yann Esposito <yann@esposito.host>
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;;; Commentary:
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;;
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;;; Code:
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(require 'projectile)
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(defvar auto-load-project-trusted-gpg-key-fingerprints
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'()
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"The list of GPG fingerprint you trust when decrypting a gpg file.
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You can retrieve the fingerprints of your own private keys
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with: `gpg --list-secret-keys' (take care of removing the
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spaces when copauto-load-project-pasting here)")
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(defun auto-load-project-get-sign-key (file)
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"Return the fingerprint of they key that signed FILE.
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To sign a file you should used
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`gpg --local-user my@email --output project.el.sig --detach-sign project.el`"
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(string-trim-right
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(shell-command-to-string
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(concat
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"gpg --status-fd 1 --verify" file ".sig " file "2>/dev/null"
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"|grep VALIDSIG"
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"|awk '{print $3}'"))))
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(defun auto-load-project-trusted-gpg-origin-p (file)
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"Return non-nil if the FILE is encrypted with a trusted key."
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(member (auto-load-project-get-sign-key file) auto-load-project-trusted-gpg-key-fingerprints))
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(defconst auto-load-project-project-file "project.el"
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"Project configuration file name.")
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(defun auto-load-project-init-project-el-auto-load ()
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"Initialize the autoload of project.el for projects."
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(with-eval-after-load 'projectile
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(defvar auto-load-project-loaded-projects (list)
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"Projects that have been loaded by `auto-load-project-load-project-file'.")
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(defun auto-load-project-load-project-file ()
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"Loads the `auto-load-project-project-file' for a project. This is run once
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after the project is loaded signifying project setup."
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(interactive)
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(when (projectile-project-p)
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(lexical-let* ((current-project-root (projectile-project-root))
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(project-init-file (expand-file-name auto-load-project-project-file current-project-root)))
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(when (and (not (member current-project-root auto-load-project-loaded-projects))
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(file-exists-p project-init-file)
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(auto-load-project-trusted-gpg-origin-p project-init-file))
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(message "Loading project init file for %s" (projectile-project-name))
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(condition-case ex
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(progn (load project-init-file)
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(add-to-list 'auto-load-project-loaded-projects current-project-root)
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(message "%s loaded successfully" project-init-file))
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('error
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(message
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"There was an error loading %s: %s"
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project-init-file
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(error-message-string ex))))))))
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(add-hook 'find-file-hook #'auto-load-project-load-project-file t)
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(add-hook 'dired-mode-hook #'auto-load-project-load-project-file t)))
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(provide 'auto-load-project)
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;;; auto-load-project.el ends here
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