Conflict in package installed with both package and el-get?

Question

I list my packages:

;; List all packages installed with el-get-install (look for "installed" to find installed packages)
(el-get-list-packages)

;; List packages installed with "package-install"
(package-list-packages)

And I see that the package projectile (which is not working fine) is installed both with el-get and package-install.

• Does this mean the package is duplicated?
• Which installation takes precedence?
• How do I uninstall packages installed with el-get-install?
• How do I uninstall packages installed with package-install?
• Is it possible to globally disable all packages installed with package-install?
• Is it possible to globally disable all packages installed with el-get-install?

Answer 1

• Does this mean the package is duplicated?

Probably. Though it's also possible to tell el-get to install packages via package.el. Use M-x el-get-describe to see the :type of the package, if it's elpa then that means el-get is listing the package.el installation, otherwise it's duplicated.

• Which installation takes precedence?

Depends on the order you call el-get and package-initialize in your init file. Use M-x locate-library to find out where a lisp file is loaded from.

• How do I uninstall packages installed with el-get-install?
• How do I uninstall packages installed with package-install?

M-x el-get-remove and M-x package-delete respectively.

• Is it possible to globally disable all packages installed with package-install?
• Is it possible to globally disable all packages installed with el-get-install?

To prevent loading el-get packages during startup, remove the call to el-get from your init file. For package.el packages, remove the call to package-initialize and also set package-enable-at-startup to nil.

There's no easy way to disable packages after the fact in a running Emacs session (you can try unload-feature, if you know the relevant "features", but it's not guaranteed to completely undo all the effects of loading, depending on what the package did).