Travis CI eval ./gradlew assemble 错误

<-------------> 0% WAITINGThe command "eval ./gradlew assemble " failed. Retrying, 2 of 3.
FAILURE: Build failed with an exception.
* What went wrong:
Task 'assemble' not found in root project 'asciidoc-docs'.
* Try:
Run gradlew tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 0s
<-------------> 0% WAITINGThe command "eval ./gradlew assemble " failed. Retrying, 3 of 3.

BUILD FAILED in 8s
<-------------> 0% WAITINGThe command "eval ./gradlew assemble " failed. Retrying, 2 of 3.
FAILURE: Build failed with an exception.
* What went wrong:
Task 'assemble' not found in root project 'asciidoc-docs'.
* Try:
Run gradlew tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 0s
<-------------> 0% WAITINGThe command "eval ./gradlew assemble " failed. Retrying, 3 of 3.
FAILURE: Build failed with an exception.
* What went wrong:
Task 'assemble' not found in root project 'asciidoc-docs'.
* Try:
Run gradlew tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 0s
<-------------> 0% WAITINGThe command "eval ./gradlew assemble " failed 3 times.
The command "./gradlew assemble" failed and exited with 1 during .
Your build has been stopped.