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--- tutorial:migratemappings [2019/11/27 18:23] – fudge
+++ tutorial:migratemappings [2020/02/22 15:31] – Some structural cleanup, mention that Mixins are not remapped jamieswhiteshirt
@@ Line 1: / Line 1: @@
 ====== Updating Yarn mappings in a Java codebase ======
-====== Loom 0.2.6 and above ======
-Currently, this process will only affect Java files.
+Loom allows semi-automatic updating of the mappings used in a Java codebase. Due to frequent changes in Yarn, this can be a useful tool for keeping a codebase up-to-date with the newest changes.
+**Note:** This automated process currently only applies to most Java code. It will not automatically migrate mappings for Mixin targets or for code written in other language such as Kotlin or Scala.
+===== Loom 0.2.6 and above =====
 Say you want to migrate from 1.14.4 to 19w46b.
@@ Line 7: / Line 11: @@
   - Go [[https://modmuss50.me/fabric.html?&version=19w46b|here]], select ''19w46b'', and copy the ''yarn_mappings'' value, for example ''19w46b+build.1''.  DO NOT modify your gradle.properties or build.gradle yet.
   - In the root of your gradle project, run ''gradlew migrateMappings %%--%%mappings %%"%%19w46b+build.1%%"%%''
-  - Your migrated source will appear in ''remappedSrc''. Verify your code was not nuked and copy it over.
+  - Your migrated sources will appear in ''remappedSrc''. Verify that the migration produced valid migrated code.
+  - Copy the sources from ''remappedSrc'' to the original folder. Keep the original sources backed up just in case.
   - Update your gradle.properties file according to the instructions in [[https://modmuss50.me/fabric.html?&version=19w46b|this]] site.
-  - You're done.
+  - Refresh the Gradle project in your IDE.
+  - Check and update any Mixin targets that may be outdated.
 === Additional customization ===
   * Specify from where to take your Java files with ''%%--%%input path/to/source''. Default: ''src/main/java''.
   * Specify where to output the remapped source with ''%%--%%output path/to/output''. Default: 'remappedSrc'.
   * Specify a custom place to retrieve the mappings from with ''%%--%%mappings some_group:some_artifact:some_version:some_qualifier''. Default: ''net.fabricmc:yarn:<version-you-inputted>:v2''.
-====== Loom 0.2.5 and below ======
-==== Requirements ====
+=== Reporting issues ===
+Loom uses [[https://github.com/CadixDev/Mercury|Mercury]] to remap Java source code, for problems with remapping please report issues to their [[https://github.com/CadixDev/Mercury/issues|issue tracker]], or discuss it through their communications channel (irc.esper.net #cadix).
-  * Fabric-Loom 0.2.2 or above
+===== Loom 0.2.2-0.2.5 =====
-  * A Java codebase - Kotlin and Scala will not, currently, do.
-  * Some assembly required
-==== Instructions ====
+Some assembly required.
   - Figure out your target mappings version. For example, "net.fabricmc:yarn:1.14.1 Pre-Release 2+build.2".
@@ Line 32: / Line 35: @@
     * "inputDir" is the input directory, containing Java source code,
     * "outputDir" is the output directory. It will be created if it is missing.
-  - Copy the remapped source code to the input directory, if everything's fine,
+  - Copy the remapped source code to the input directory, if everything's fine.
   - Hope for the best.