gradle: how to use result of task in configuration phase (plugin ospackage) - gradle

Question

I have a gradle script in which I configure a plugin (in my case ospackage but I guess the same would apply to another plugin) using a variable as per:
ospackage {
...
version project.ext.my_version
...
}
This variable is first initialized and then is updated using a task that I call first in my build script:
ext {
...
my_version = "XXX"
...
}
task init{
group 'ho'
description 'get HO Version'
doLast {
...
project.ext.my_version = getParameter("VERSION")
...
}
}
the problem is that the plugin (in my case ospackage) always consider the initial value "XXX" and not the correct one that was set by executing the init task.
I know it has something to do with configuration and execution phase but still I cannot find a workaround to do what I want.
For info, I also tried to create a task like the one below but it also fail as it seems that buildDeb task does not overwrite ospackage version parameter
buildDeb {
doLast {
...
version project.ext.my_version
link('/usr/bin/aa', '/usr/bin/aa.sh')
...
}
}
I also tried to put at the end of my file something like:
ospackage.dependsOn("init")
but the problem is that ospackage is not recognized as a task
Thank you in advance for your help.

Answer 1

It looks to me like the essence of your question revolves around on-demand values. My understanding is that you would like to set a version number during the configuration phase and use that value during the execution phase to set a package version using the ospackage plugin.
The issue is that the ospackage documentation only provides examples (to date) that setup the package constants during the configuration phase. Obviously that won't work because it is the same time you are setting your version (something that must be able to be done in parallel). You have the right idea with doLast. I found that some things from the ospackage cannot go in "doLast" blocks like packageName (if you have more than one of the same package/task type), so I just put the things that require on-demand evaluation in that block (the version, because we need its evaluation delayed until the execution phase).
My solution was to create a variable that holds the function that resolves the version.
def versionForRpm = { -> project.version }
Create a configuration block
configurations.ext {
version = versionForRpm
...
}
This is an example of an on-demand value (aka lazily-evaluated value).
task someRpmBuild(type: Rpm) {
// all package configs that require evaluation during execution phase (lazy)
doLast {
version = configurations.ext.version
requires("someotherpackageinthisbuild", configurations.ext.version(), 0)
}
// all package configs that may be evaluated during the configuration phase
release = configurations.ext.release
packageGroup = configurations.ext.packageGroup
license = configurations.ext.license
packager = configurations.ext.packager
user = configurations.ext.user
distribution = configurations.ext.distribution
vendor = configurations.ext.vendor
url = configurations.ext.url
os = configurations.ext.os
buildHost = configurations.ext.buildHost
epoch = configurations.ext.epoch
arch = configurations.ext.arch
}
Note that configurations.ext.version will be "called" automatically in the execution phase. I needed to explicitly call it when used as an argument in requires, however.

Answer 2

according to the documentation, the task type is Deb:
task fooDeb(type: Deb) {
packageName // Default to project.name
packageDescription // Defaults to project.description
version // Version field, defaults to project.version
arch // Architecture, defaults to "all". E.g. "amd64", "all"
multiArch // Configure multi-arch behavior: NONE (default), SAME, FOREIGN, ALLOWED (see: https://wiki.ubuntu.com/MultiarchSpec )
release // DEB Release
epoch // Epoch, defaults to 0
user // Default user to permission files to
permissionGroup // Default group to permission files to, "group" is used by Gradle for the display of tasks
packageGroup
buildHost
license
packager
distribution
vendor
url
signingKeyId
signingKeyPassphrase
signingKeyRingFile
sourcePackage
provides
uid // Default uid of files
gid // Default gid of files
createDirectoryEntry // [Boolean]
maintainer // Defaults to packager
uploaders // Defaults to packager
priority
summary
conflicts
recommends
suggests
enhances
preDepends
breaks
replaces
}
where:
version Version field, defaults to project.version
might give the RPM plugin a try.

Answer 3

I was able to solve the issue i had, setting the destination for the ospackage copy destination to a calculated value by using
configurations.ext{
mydestdir = ""
rpmVersion = "1"
releaseNumber = "1"
}
task init{
group 'ho'
description 'get HO Version'
doLast {
...
configurations.ext.mydestdir = "/store/tmp/+getSubDir()"
configurations.ext.rpmVersion = "123"
configurations.ext.releaseNumber = "456"
...
}
}
task fooRpm(type: Rpm) {
dependsOn init
...
doLast(){
version = configurations.rpmVersion
release = configurations.releaseNumber
}
from(project.tempDir) {
into configurations.mydestdir
fileMode = 0644
user = "nobody"
permissionGroup = "nobody"
}
}
I think you'll have use type Deb, and make some changes, but this should speed up your build, and you can verify results by adding --scan before and after making these changes.