Git LFS迁移生成提交无效：缺失日期前空格且日期异常

Let's break down what's going on here: when you ran git lfs migrate import --no-rewrite luca/models/weights/yolov5m.pt, Git LFS generated a commit with broken author/committer metadata—specifically, there's a missing space between your email address and the date string. Git couldn't parse this messed-up line correctly, so it defaulted the date to the Unix epoch (Thu Jan 1 00:00:00 1970 +0000) and threw that missingSpaceBeforeDate error during git fsck.

Here's how to fix this, depending on where the bad commit sits in your history:

1. If the bad commit is your latest (unpushed) commit #

• First, run git show 1e39456 again to check the exact author line—you’ll likely see something like Author: Luca<luca@example.com>Thu Jan 1... (no space after the email closing bracket or before the date).
• Fix the commit with an amend:

  git commit --amend
  

  This will open your default text editor. Look for the Author: and Committer: lines, and add a space between your email's closing angle bracket and the date. For example:

  Author: Luca luca@example.com Thu Jan 18 14:30:00 2024 +0100

• If you just want to set the date to the current time instead of keeping the epoch placeholder, you can skip manual editing and run:

  git commit --amend --date="$(date -R)"
  

• After saving the changes, run git fsck again to confirm the error is gone.

2. If the bad commit is buried in your history #

• Use interactive rebase to edit the problematic commit:

  git rebase -i HEAD~3  # Replace 3 with how many commits back the bad one is
  

• In the editor that pops up, find the line for commit 1e39456 and change pick to edit. Save and close the editor.
• Git will pause at that bad commit. Now run the amend command to fix the date/author format:

  git commit --amend --date="$(date -R)"
  

• Continue the rebase process with:

  git rebase --continue
  

• Once done, run git fsck to verify the issue is resolved.

3. Prevent this from happening again #

• Before re-running the Git LFS migrate, double-check your Git user config is set correctly:

  git config user.name
  git config user.email
  

  If either command returns nothing, set them with:

  git config --global user.name "Your Full Name"
  git config --global user.email "your.email@example.com"
  

• If you had to reset the bad commit first (using git reset --hard HEAD~1), re-run the migrate command:

  git lfs migrate import --no-rewrite luca/models/weights/yolov5m.pt
  

  This should generate a properly formatted commit this time around.

内容的提问来源于stack exchange，提问作者Luca