如何检查远程存储库是否已更改,是否需要进行拉取?

现在我使用这个简单的脚本:

git pull --dry-run | grep -q -v 'Already up-to-date.' && changed=1

但它相当重。

有没有更好的办法?理想的解决方案是检查所有远程分支,并返回已更改分支的名称以及每个分支中新提交的数量。


当前回答

下面的脚本运行良好。

changed=0
git remote update && git status -uno | grep -q 'Your branch is behind' && changed=1
if [ $changed = 1 ]; then
    git pull
    echo "Updated successfully";
else
    echo "Up-to-date"
fi

其他回答

这一行在zsh中为我工作(来自@Stephen Haberman的回答)

git fetch; [ $(git rev-parse HEAD) = $(git rev-parse @{u}) ] \
    && echo "Up to date" || echo "Not up to date"

下面的脚本运行良好。

changed=0
git remote update && git status -uno | grep -q 'Your branch is behind' && changed=1
if [ $changed = 1 ]; then
    git pull
    echo "Updated successfully";
else
    echo "Up-to-date"
fi

因为尼尔的回答对我帮助很大,这里是一个没有依赖关系的Python翻译:

import os
import logging
import subprocess

def check_for_updates(directory:str) -> None:
    """Check git repo state in respect to remote"""
    git_cmd = lambda cmd: subprocess.run(
        ["git"] + cmd,
        cwd=directory,
        stdout=subprocess.PIPE,
        check=True,
        universal_newlines=True).stdout.rstrip("\n")

    origin = git_cmd(["config", "--get", "remote.origin.url"])
    logging.debug("Git repo origin: %r", origin)
    for line in git_cmd(["fetch"]):
        logging.debug(line)
    local_sha = git_cmd(["rev-parse", "@"])
    remote_sha = git_cmd(["rev-parse", "@{u}"])
    base_sha = git_cmd(["merge-base", "@", "@{u}"])
    if local_sha == remote_sha:
        logging.info("Repo is up to date")
    elif local_sha == base_sha:
        logging.info("You need to pull")
    elif remote_sha == base_sha:
        logging.info("You need to push")
    else:
        logging.info("Diverged")

check_for_updates(os.path.dirname(__file__))

hth

我基于@jberger的评论来解决这个问题。

if git checkout master &&
    git fetch origin master &&
    [ `git rev-list HEAD...origin/master --count` != 0 ] &&
    git merge origin/master
then
    echo 'Updated!'
else
    echo 'Not updated.'
fi

使用简单的regexp:

str=$(git status) 
if [[ $str =~ .*Your\ branch\ is\ behind.*by.*commits,\ and\ can\ be\ fast-forwarded ]]; then
    echo `date "+%Y-%m-%d %H:%M:%S"` "Needs pull"
else
    echo "Code is up to date"
fi