解決/home/travis/.travis/functions: ./mvnw: Permission denied

報錯/home/travis/.travis/functions: line 320: ./mvnw: Permission denied
The command "eval ./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V " failed. Retrying, 2 of 3.

$ java -Xmx32m -version
openjdk version "11.0.2" 2019-01-15
OpenJDK Runtime Environment 18.9 (build 11.0.2+9)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.2+9, mixed mode)
$ javac -J-Xmx32m -version
javac 11.0.2
3.02s$ ./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V
/home/travis/.travis/functions: line 320: ./mvnw: Permission denied
The command "eval ./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V " failed. Retrying, 2 of 3.
/home/travis/.travis/functions: line 320: ./mvnw: Permission denied
The command "eval ./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V " failed. Retrying, 3 of 3.
/home/travis/.travis/functions: line 320: ./mvnw: Permission denied
The command "eval ./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V " failed 3 times.
The command "./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V" failed and exited with 126 during .
Your build has been stopped.

使用SpringBoot項目，在github上集成travis時報錯Permission denied，很明顯是缺少執行mvnw的權限，在install執行之前賦權就可以了，在travis.yml文件中加入如下語句

// travis.yml
before_install:
  - chmod +x mvnw