使用maven-scm-plugin的Git更新失败及相关操作问题

Let's break down your two problems and walk through practical fixes step by step:

1. Overwriting local changes with remote code (equivalent to git checkout .) #

The core issue here is that you staged your local changes with git add . first. The mvn scm:update command doesn't automatically overwrite staged or uncommitted local changes—it will either attempt to merge remote updates with yours or skip files at risk of conflict.

To replicate the git checkout . behavior (discard local changes and sync fully with remote), follow this sequence:

• First, unstage your local changes to move them back to the working directory:

  git reset HEAD .
  

• Next, discard all uncommitted changes in your working directory:

  git checkout .
  

• Finally, pull the latest remote updates using the SCM plugin:

  mvn scm:update
  

If you prefer using only Maven commands, you can use scm:checkout with the forceUpdate flag (note this will re-clone the repo if necessary, so it's more heavy-handed):

mvn scm:checkout -DforceUpdate=true

2. Adding all changed files (respecting .gitignore) with mvn scm:add #

Your earlier attempts failed for these reasons:

• -Dincludes="." isn't a valid pattern for the parameter—it expects file/directory matches, not just the current directory marker.
• -Dincludes="*" matches all root-directory files, including those excluded by .gitignore, since explicit patterns bypass the ignore rules.

The simplest fix is to let the Git SCM provider handle inclusion natively, just like git add . does. Run the command without specifying the includes parameter:

mvn scm:add

This invokes git add . under the hood, which automatically skips .gitignore-excluded files and stages only changed tracked files plus new un-tracked files that aren't ignored.

If you need to target specific subsets while respecting .gitignore, use a recursive pattern with explicit excludes if needed:

mvn scm:add -Dincludes="**/*" -Dexcludes=".project"

But the most reliable approach is the parameter-free mvn scm:add—it mirrors git add . perfectly.

内容的提问来源于stack exchange，提问作者peterremec