[jira] [Created] (CB-13953) Cordova has a hard dependency on Gradle being on the path and JAVA_HOME being set in advance

["armin (JIRA)" <ji...@apache.org>]

armin created CB-13953:
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             Summary: Cordova has a hard dependency on Gradle being on the path and JAVA_HOME being set in advance
                 Key: CB-13953
                 URL: https://issues.apache.org/jira/browse/CB-13953
             Project: Apache Cordova
          Issue Type: Improvement
          Components: cordova-android
    Affects Versions: cordova-android-7.0.0
         Environment: android build
            Reporter: armin
            Assignee: Joe Bowser


Cordova is tightly coupled with the gradle executable and it is verifying it being on the path even though the gradle wrapper is available. Also the JAVA_HOME has to be already available or java be on the path before running cordova commands even though these can be set during the build.

In general there are several problems with the current gradle bootstrapping process:
 * Cordova checks for gradle being on the path and fails execution if it isn't there even though the wrapper is already generated so gradle is not needed at that point. The wrapper files are also on .gitignore for no reason since committing them is fairly standard practice and they could be bundled with cordova from the beginning to avoid dependency on gradle in general and to tie the gradle version to the cordova version.
 * In general the checks inside cordova are not sufficient to determine if a given "requirement" is available (or will be set during the build) or not, it should be possible to continue the build even if the build-in requirement checks fail
 * The gradle wrapper is generated by Cordova instead of the user as it should be and as it is the gradle convention -> this means any customization process is extremely difficult and we have no control. It is understandable to tie the gradle version to a cordova version but this version check should be done during execution and not before so the users can manage their own wrapper
 * Cordova is using a separate gradle file for generating the wrapper and not the actual build.gradle file -> wrapper.gradle is being used for generation which means any configuration from build.gradle is not respected, such as wrapper version or wrapper customization (for example we also generate the JAVA_HOME variable into the wrapper so we would not need java or gradle on the path at all after the initial install, as we only have a local installations)



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