在Groovy和Jenkins管道构建中使用变量

Question

I have a Jenkins pipeline build that needs to obtain the commit id (sha), so from what i can see the only way to get this is by doing the following

sh "git rev-parse --long HEAD > .git/commit-id"                        
GIT_COMMIT = readFile('.git/commit-id')

I need to use the GIT_COMMIT var within a curl command but am having trouble using it

sh '''curl "https://api.github.com/repos/myRepo/myBuild/statuses/${GIT_COMMIT}"}"''' 
sh '''curl "https://api.github.com/repos/myRepo/myBuild/statuses/GIT_COMMIT"}"'''

At the moment GIT_COMMIT is not being passed through, it is always blank, but yet if i echo it i get the value back

echo GIT_COMMIT
--long
12345678910

Can anyone advise on how i achieve what i require please

Thanks

UPDATE

I have tried the following but still no luck

sh '''GIT_COMMIT=$(git rev-parse HEAD)'''
sh '''curl "https://api.github.com/repos/myBuild/statuses/$GIT_COMMIT"'''

Answer 1

Unless you have a need for assigning the commit hash to a variable, you can do this in a single line without outputting to a file:

sh "curl https://api.github.com/repos/myRepo/myBuild/statuses/\$(git rev-parse HEAD)"

Keep in mind that triple quotes are only necessary for multiline strings in Groovy http://docs.groovy-lang.org/latest/html/documentation/index.html#_triple_double_quoted_string

Answer 2

If you want to do away with having to write to a file to keep the commit hash you can use returnStdout: true on sh and pass it directly.

GIT_COMMIT = sh script: 'git rev-parse HEAD',  returnStdout: true
sh """curl "https://api.github.com/repos/myBuild/statuses/${GIT_COMMIT}""""

Answer 3

Variable/expression expansion (interpolation) only works in Groovy for certain types of string literal syntax. The syntax you are using:

'''content${interpolation}etc'''

is not one of them. Instead replace the triple-single-quotes ( ''' ) with triple-double-quotes ( """ ), like this:

sh """curl "https://api.github.com/repos/myRepo/myBuild/statuses/${GIT_COMMIT}"}""""

EDIT: I'm also a bit concerned that there may still be syntax errors in this statement, particularly the extra }" at the end. Maybe the following is more like what you really need?:

sh """curl "https://api.github.com/repos/myRepo/myBuild/statuses/${GIT_COMMIT}""""