[GitHub] [incubator-shardingsphere] tankilo edited a comment on issue #2045: Mave moudle has wrong compile order, sharding-sql-test should be compiled before sharding-core

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tankilo edited a comment on issue #2045: Mave moudle has wrong compile order, sharding-sql-test should be compiled before sharding-core
URL: https://github.com/apache/incubator-shardingsphere/issues/2045#issuecomment-473659647
 
 
   > Can you explain the reason for close this issue?
   
   In fact, yesterday night, i did ran into error when i try to compile the code. But this morning, after i post this issue , i couldn't reproduce this problem again (clean related jars in  local maven repo and compile).
   Though `sharding-sql-test` is the last one  in the `<modules>` element of the parent pom.xml, it's still compiled before some modules of `sharding-core`.
   ```
   [INFO] Reactor Build Order:
   [INFO] 
   [INFO] sharding-sphere
   [INFO] sharding-core
   [INFO] sharding-core-api
   [INFO] sharding-core-common
   [INFO] sharding-core-parse
   [INFO] sharding-core-parse-spi
   [INFO] sharding-sql-test
   [INFO] sharding-core-parse-common
   [INFO] sharding-core-parse-mysql
   [INFO] sharding-core-parse-postgresql
   [INFO] sharding-core-parse-oracle
   [INFO] sharding-core-parse-sqlserver
   ```
   
   Before, i think module building order is just the same as what we define in <modules> element of the parent pom.xml. 
   And after Googling, maven is smarter than I thought.
   https://stackoverflow.com/questions/18629897/maven-build-order-multiple-modules
   http://maven.apache.org/guides/mini/guide-multiple-modules.html
   
   > Reactor Sorting
   >Because modules within a multi-module build can depend on each other, it is important that the reactor sorts all the projects in a way that guarantees any project is built before it is required.
   >
   > The following relationships are honoured when sorting projects:
   >
   > a project dependency on another module in the build
   a plugin declaration where the plugin is another module in the build
   a plugin dependency on another module in the build
   a build extension declaration on another module in the build
   the order declared in the <modules> element (if no other rule applies)

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