Project config, variables and parameters

[Tanushree2904]

Hello Team,

I am exploring blowdryer plugin and have a few queries regarding project configurations.

1. Is there a way I can pass any variable from build.gradle(of my project) to any config file (e.g. maven.gradle) to apply/remove some settings?
2. Can I parameterise the plugin version in "plugin.versions" file and store them in gradle.properties?

[nedtwigg]

Is there a way I can pass any variable from build.gradle(of my project) to any config file (e.g. maven.gradle) to apply/remove some settings?

Yes, that is possible, and a good example of that is here:

https://github.com/diffplug/atplug/blob/4108c68ac750ba33968407b46ead009b476d2d61/build.gradle#L34-L50

Can I parameterise the plugin version in "plugin.versions" file and store them in gradle.properties?

Possible, but a bit tricky. The API for plugin.versions is this

blowdryer/src/main/java/com/diffplug/blowdryer/BlowdryerSetup.java

Lines 425 to 448 in c6c8056

	public void file(String file) throws IOException {
	add(readFile(Blowdryer.file(file)));
	}
	public void add(String line) {
	totalContent.append(line.replace("\r", ""));
	if (!line.endsWith("\n")) {
	totalContent.append('\n');
	}
	}
	public void remove(String line) {
	replace(line + "\n", "");
	}
	public void replace(String in, String out) {
	String current = totalContent.toString();
	String replaced = current.replace(in.replace("\r", ""), out);
	if (current.equals(replaced)) {
	throw new IllegalArgumentException("Doesn't contain " + in + "\n\n" + current);
	}
	totalContent.setLength(0);
	totalContent.append(replaced);
	}

An example of it in use is

https://github.com/diffplug/goomph/blob/a4b7eee3099b75d9e941033750e007e432f9186f/settings.gradle#L23-L31

You could use replace to replace tokens from the plugin.versions file, but I believe gradle.properties is not present when settings.gradle is evaluated. You would have to explicitly parse gradle.properties yourself. That can be done, and an example of that is here

https://github.com/mytakedotorg/mtdo/blob/e1e9bd41744d33b4481fd7398b16c85ea1b98cf3/buildSrc/build.gradle#L16-L26

[Tanushree2904]

In the below link , you are applying different settings to different sub projects.

https://github.com/diffplug/atplug/blob/4108c68ac750ba33968407b46ead009b476d2d61/build.gradle#L34-L50

I want to know if we can achieve the below scenario with 2 different projects:

Project 1:
Project 1 uses the below maven publish block in build.gradle :

plugins {
    id 'maven-publish'
}
java {
    withSourcesJar()
    withJavadocJar()
}

publishing {
    publications {
        //maven publishing content
    }
}

Project 2:
Project 2 uses only the maven publish plugin and publishing block:

plugins {
    id 'maven-publish'
}

publishing {
    publications {
        //maven publishing content
    }
}

I want to configure my maven.gradle in this way:

plugins {
    id 'maven-publish'
}

if javadocJarNeeded== True {    // some condition like this. (javadocJarNeeded will be passed from build.gradle of project1 )
      java {
         withSourcesJar()
         withJavadocJar()
   }
}

publishing {
    publications {
        //maven publishing content
    }
}

Can achieve this scenario if Project 1 and project 2 are not related? Or, is this plugin only for multi-module projects which are related like in the example you shared?

[nedtwigg]

Can achieve this scenario if Project 1 and project 2 are not related?

Yes. Like this:

// in build.gradle
ext.javadocJarNeeded = 'true'
ext.javadocJarNeeded = 'false'
apply from: 干.file('base/maven.gradle')

// in base/maven.gradle
def javadocJarNeeded = Boolean.parseBoolean(干.proj('javadocJarNeeded', 'true or false'))

[Tanushree2904]

Thank you so much !