If you use CocoaPods, you’re familiar with the pod install command. Especially in the process of creating a pod, you end up running this command a lot. The annoying part is that there’s a delay before it starts returning much output. This is where the pod gem reaches out to check to see if the specs have changed at all.

Even when the pod version specifiers haven’t changed, CocoaPods reaches out to fetch any updates to the master spec repo, along with any private spec repos that may be configured. During local development of a pod, this slows down the process unnecessarily as the only changes you care about are local to your hard drive.

$ pod install --verbose
Analyzing dependencies
Updating spec repositories
$ /usr/local/bin/git rev-parse >/dev/null 2>&1
$ /usr/local/bin/git ls-remote
From https://github.com/CocoaPods/Specs.git
f83cbf438a0f80b7df76534ffa08efcb359ce982 HEAD
f83cbf438a0f80b7df76534ffa08efcb359ce982 refs/heads/master
fe7df26fe5545072c11abac241d73087a29e87d9 refs/pull/1/head
1748dab37fe08120775777a084e0fb9da10c4a63 refs/pull/1/merge
...
5a7c7be28f0859865035c324e625c507cf858f4a refs/pull/9998/head
7a19ff8bfbaf00a485ca2274a229205d715dcbf7 refs/pull/9999/head
Updating spec repo `master`
$ /usr/local/bin/git pull --ff-only
...yawn...

–no-repo-update

The –no-repo-update switch suppresses this spec repo update and speeds up the install command considerably.

Since that is way too much to type for such a common command to fly across my terminal, I like to wrap these up in a nice, short alias.

alias pi='pod install --no-repo-update'

Another situation where suppressing this automatic spec repo update is helpful is when you have unreliable or no network connection. The spec repo update is going to fail anyway.

Now, you don’t want to use this alias every time you need to do a pod install as your master spec repo would get out of date and you could miss important updates. In general, I allow pod install or pod update to update my spec repos the first time I run them on any given day and suppress the repo update the rest of the day.