Git 預推鉤

**** git push 在檢查遠端狀態後，但在推送任何內容之前呼叫 pre-push 指令碼。如果此指令碼以非零狀態退出，則不會推送任何內容。

使用以下引數呼叫此掛鉤：

 $1 -- Name of the remote to which the push is being done (Ex: origin)
 $2 -- URL to which the push is being done (Ex: https://<host>:<port>/<username>/<project_name>.git)

有關正在推送的提交的資訊作為行提供給表單中的標準輸入：

<local_ref> <local_sha1> <remote_ref> <remote_sha1>

樣本值：

local_ref = refs/heads/master
local_sha1 = 68a07ee4f6af8271dc40caae6cc23f283122ed11
remote_ref = refs/heads/master
remote_sha1 = efd4d512f34b11e3cf5c12433bbedd4b1532716f

下面的示例預推指令碼是從預設的 pre-push.sample 中獲取的，當使用 git init 初始化新的儲存庫時會自動建立

# This sample shows how to prevent push of commits where the log message starts
# with "WIP" (work in progress).

remote="$1"
url="$2"

z40=0000000000000000000000000000000000000000

while read local_ref local_sha remote_ref remote_sha
do
    if [ "$local_sha" = $z40 ]
    then
        # Handle delete
        :
    else
        if [ "$remote_sha" = $z40 ]
        then
            # New branch, examine all commits
            range="$local_sha"
        else
            # Update to existing branch, examine new commits
            range="$remote_sha..$local_sha"
        fi

        # Check for WIP commit
        commit=`git rev-list -n 1 --grep '^WIP' "$range"`
        if [ -n "$commit" ]
        then
            echo >&2 "Found WIP commit in $local_ref, not pushing"
            exit 1
        fi
    fi
done

exit 0