引用github readme.md中的当前分支

Question 1

在我的github reporeadme.md文件中，我有一个Travis-CI徽章。我使用以下链接：

https://travis-ci.org/joegattnet/joegattnet_v3.png?branch=staging

明显的问题是分支是硬编码的。是否可以使用某种变量，以便使分支成为当前正在查看的分支？

Question 2

从来没听说过。
GitHub支持确认（通过OP Joe Gatt的评论））

唯一的方法是通过我自己的服务传递链接，该服务将使用github的http Referrer标头确定正在引用的分支，然后从Travis CI中获取适当的图像

我宁愿为每个分支机构制作一个Travis-CI徽章，以便读者在看到 README.md。

2016年更新（3年后）：尽管GitHub方面没有任何变化，但fedorqui报告了Andrie的“在Github上获取Travis Shield以反映所选的分支状态”中提到的解决方法。
只需显示所有分支及其各自的TravisCI徽章。

如果您只有两个或三个分支，那就足够了。

Question 3

我使用一个git pre-commit钩解决了这个问题，该钩使用当前分支重写了README.md中的Travis行。以下是用法和预先提交（Python）代码的示例（针对所询问的问题）。

用法

dandye$ git checkout -b feature123 origin/master
Branch feature123 set up to track remote branch master from origin.
Switched to a new branch 'feature123'
dandye$ echo "* Feature123" >> README.md 
dandye$ git add README.md 
dandye$ git commit -m "Added Feature123"
Starting pre-commit hook...
Replacing:
    [![Build Status](https://travis-ci.org/joegattnet/joegattnet_v3.png?branch=master)][travis]

with:
    [![Build Status](https://travis-ci.org/joegattnet/joegattnet_v3.png?branch=feature123)][travis]

pre-commit hook complete.
[feature123 54897ee] Added Feature123
 1 file changed, 2 insertions(+), 1 deletion(-)
dandye$ cat README.md |grep "Build Status"
[![Build Status](https://travis-ci.org/joegattnet/joegattnet_v3.png?branch=feature123)][travis]
dandye$

用于预提交代码的Python代码

dandye$ cat .git/hooks/pre-commit

#!/usr/bin/python
"""
Referencing current branch in github readme.md[1]

This pre-commit hook[2] updates the README.md file's
Travis badge with the current branch. Gist at[4].

[1] http://stackoverflow.com/questions/18673694/referencing-current-branch-in-github-readme-md
[2] http://www.git-scm.com/book/en/v2/Customizing-Git-Git-Hooks
[3] https://docs.travis-ci.com/user/status-images/
[4] https://gist.github.com/dandye/dfe0870a6a1151c89ed9
"""
import subprocess

# Hard-Coded for your repo (ToDo: get from remote?)
GITHUB_USER="joegattnet"
REPO="joegattnet_v3"

print "Starting pre-commit hook..."

BRANCH=subprocess.check_output(["git",
                                "rev-parse",
                                "--abbrev-ref",
                                "HEAD"]).strip()

# String with hard-coded values
# See Embedding Status Images[3] for alternate formats (private repos, svg, etc)

#  [![Build Status](https://travis-ci.org/
#  joegattnet/joegattnet_v3.png?
#  branch=staging)][travis]

# Output String with Variable substitution
travis="[![Build Status](https://travis-ci.org/" \
       "{GITHUB_USER}/{REPO}.png?" \
       "branch={BRANCH})][travis]\n".format(BRANCH=BRANCH,
                                            GITHUB_USER=GITHUB_USER,
                                            REPO=REPO)

sentinel_str="[![Build Status]"

readmelines=open("README.md").readlines()
with open("README.md", "w") as fh:
    for aline in readmelines:
        if sentinel_str in aline and travis != aline:
            print "Replacing:\n\t{aline}\nwith:\n\t{travis}".format(
                   aline=aline,
                   travis=travis)
            fh.write(travis)
        else:
            fh.write(aline)

subprocess.check_output(["git", "add", "README.md" ])

print "pre-commit hook complete."

Question 4

对我而言，最好的解决方案是创建一个服务器，在该服务器上发送带有用户名和仓库名称的查询，并获取具有所有分支的构建状态的svg映像。