[Bug 1765866] [NEW] [FTBFS] gradle 3.4.1-7 ftbfs when build with the newer default-jdk (openjdk-10 or newer)

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You have been subscribed to a public bug by Tiago Stürmer Daitx (tdaitx):

When using openjdk-10 as the default-jdk gradle will fail with the
following error:

:signing:assemble
:docs:javadocAlljavadoc: error - Error fetching URL: file:/usr/share/doc/default-jdk/api/
javadoc: warning - You have not specified the version of HTML to use.

Until openjdk-9 any missing api URLs were considered a warning but from
openjdk-10 upwards this was changed to an error.

The URL is missing because it has been hardcoded in the
subprojects/docs/docs.gradle file as:

def javaApiUrl = "file:///usr/share/doc/default-jdk/api/"

but the path /usr/share/doc/default-jdk is a link that belongs to the
default-jdk package which is not a build dependency of gradle (it is
in fact listed as an alternate dependency of default-jdk-headless).
Still, that is not enough as the default-jdk package does neither
contain nor depend on a package that holds the required api files.
Those files are in the openjdk-X-doc package and the dependency on it
is done through default-jdk-doc.

gradle already build depends on default-jdk-doc and even gradle-doc has
a dependency on it. By changing the javaApiUrl to point to the right api
directory, as in:

def javaApiUrl = "file:///usr/share/doc/default-jdk-doc/api/"

the build works as expected.

The patch debian/patches/use-local-artifacts.patch should be updated to
reflect this new patch.

** Affects: gradle (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: ftbfs patch
-- 
[FTBFS] gradle 3.4.1-7 ftbfs when build with the newer default-jdk (openjdk-10 or newer)
https://bugs.launchpad.net/bugs/1765866
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