Git报错“<refspec> does not look like a ref”：本地分支关联Heroku远程问题

Hey there, let's break down why you're seeing that confusing refspec error and fix it up!

First, let's start with the most likely culprit: your staging remote might not be properly linked to your lucy-staging Heroku app. Here's how to verify and fix that:

Step 1: Check your remote repositories #

Run this command to list all your configured remotes:

git remote -v

Look for an entry named staging that points to your Heroku app's Git URL (it should look like https://git.heroku.com/lucy-staging.git or the SSH variant git@heroku.com:lucy-staging.git).

If you don't see this entry, you need to add the remote first. The easiest way is using the Heroku CLI:

heroku git:remote -a lucy-staging -r staging

This command automatically links your lucy-staging app to a local remote named staging.

Step 2: Verify your local branch exists #

Double-check that your custom-error-views branch actually exists locally and that you've spelled it correctly (Git is case-sensitive!). Run:

git branch --list custom-error-views

If the branch doesn't show up, make sure you've checked it out or created it properly before trying to push.

Step 3: Test with a simplified push command #

If the remote and branch are both correctly set up, try using HEAD to reference your current branch (make sure you're checked out to custom-error-views first):

git push staging HEAD:master

If this works, it means there was a subtle typo in your original branch name. If it still throws the same error, let's look at subtree-specific issues.

Step 4: Fix subtree push confusion #

You mentioned adapting this for Git subtree pushes—if custom-error-views is a subtree (not a regular branch), your original command won't work. Subtree pushes require specifying the local directory path, not a branch name. For example:

git subtree push --prefix=path/to/your/subtree staging master

Replace path/to/your/subtree with the actual directory in your repo that's set up as a subtree. It's easy to mix up regular branch push syntax with subtree syntax, so that might be the issue here.

Once you've worked through these steps, your push command should work as expected!

内容的提问来源于stack exchange，提问作者Kurt Peek