Executing CURL in Shared Library Jenkins Pipeline Using `Process` - jenkins

Question

I have a method in a shared library in my Jenkins pipeline. The idea is to use this library and upload files to a remote host. The library is imported in a singleton library.
import com.package.jobutil.UploadFile
def uploadFunc() {
def uploader = new UploadFile(this)
withCredentials ([usernamePassword(credentialsId: 'user', userNameVariable: 'username', passwordVariable:'password)]) {
uploader.uploadArtifact("${username}", "${password}", file.txt, location)
}
}
def call() {
uploadFunc()
}
The class that is instantiated looks like this:
class UploadFile {
def steps
UploadFile (steps) {
this.steps = steps
}
pulic uploadArtifct (String user, String password, String file, String location) {
Process proc
def cred = "${user}:${pass}"
def cmd = ["curl", "-v", "-u", cred, "--upload-file", file, location]
steps.println "CURL: ${cmd}"
proc = cmd.execute()
}
}
Even though I see the println line in the logs. I do not see the curl command being executed.
Is there something I am missing that does not invoke the cmd.execute to work?
EDIT
When I use the curl directly in the library, it works.
pulic uploadArtifct (String user, String password, String file, String
location) {
def cred = "${user}:${password}"
def cmd = "curl -v -u ${cred} --upload-file ${file} ${nexusLocation}/${file}"
try {
steps.sh cmd
} catch (Exception e) {
throw new RuntimeExceptipon("Cannot execute curl, exception: [${e.getClass().getName()} - '${e.getMessage()}']")
}
}
However, when trying to use the Process it does not work.
pulic uploadArtifct (String user, String password, String file, String
location) {
def cred = "${user}:${password}"
def cmd = ["curl", "-v", "-u", cred, "--upload-file", ${file}, ${location}]
try {
def sout = new StringBuffer(), serr = new StringBuffer()
def proc = cmd.execute()
proc.consumeProcessOutput(sout, serr)
proc.waitForOrKill(1000)
println sout
} catch (Exception e) {
throw new RuntimeExceptipon("Cannot execute curl, exception: [${e.getClass().getName()} - '${e.getMessage()}']")
}
}
The exception I get is:
java.lang.RuntimeException: Cannot execute curl, exception: [groovy.lang.MissingMethodException - 'No signature of method: java.lang.String.div() is applicable for argument types: (org.codehaus.groovy.runtime.GStringImpl) values: [file.txt]

Answer 1

As explained here, you need to capture stdout/stderr to see anything.
At the very least:
def outputStream = new StringBuffer();
proc.waitForProcessOutput(outputStream, System.err)
//proc.waitForProcessOutput(System.out, System.err)
Or, as in this gist:
def sout = new StringBuffer(), serr = new StringBuffer()
def proc = cmd.execute()
proc.consumeProcessOutput(sout, serr)
proc.waitForOrKill(1000)
println sout
An example of blocking call would be:
println new ProcessBuilder( 'sh', '-c', 'du -h --max-depth=1 /var/foo/bar/folder\\ with\\ spaces | sort -hr').redirectErrorStream(true).start().text
def cmd = ["curl", "-v", "-u", cred, "--upload-file", ${file}, ${location}/${file}]
No signature of method: java.lang.String.div() is applicable for argument types: (org.codehaus.groovy.runtime.GStringImpl) values: [file.txt]
The '/' in '${location}/${file}' is interpreted as an '/ (div) operation instead of a string.
Try instead for that curl command argument:
${location}+"/"+${file}
As noted in your subsequent question, the all path needs to be between double-quotes.