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--- documentation:fabric_mod_json_spec [2020/02/07 22:35] – created juuz
+++ documentation:fabric_mod_json_spec [2023/12/27 12:54] (current) – mineblock11
@@ Line 1: / Line 1: @@
-====== fabric.mod.json ======
+====== fabric.mod.json Specification ======
 In all cases, the mod JSON, ''fabric.mod.json'', is defined as either:
@@ Line 65: / Line 65: @@
 === VersionRange ===
-A string or array of string declaring supported version ranges. In the case of an array, an "OR" relationship is assumed - that is, only one range has to match for the collective range to be satisfied.
+A string or array of string declaring supported version ranges in the form ''<operator1><range1>[ <operator2><range2>]...''. Multiple space separated ranges within the same string follow an "AND" relationship - they must all be satisfied. In the case of an array, an "OR" relationship is assumed between the array elements - that is, only one element has to match for the collective declaration to be satisfied.
-In the case of all versions, ''*'' is a special string declaring that any version is matched by the range. In addition, exact string matches must be possible regardless of the version type.
+In the case of all versions, ''*'' is a special string declaring that any version is matched by the range. Fabric Loader supports a [[https://semver.org/ semver 2.0.0]] superset that allows an arbitrary amount of version components, empty pre-release and arbitrary build metadata. Version strings that are incompatible with this format are still accepted, but comparison support is limited to equality operators.
-For semantic versions, the specification follows a rough subset of the [[https://docs.npmjs.com/misc/semver|NPM semver]] specification, in particular the following features are supported:
+Versions compatible with the extended semver format are compared as defined by [[https://semver.org/ semver 2.0.0]] with arbitrary version component comparisons beign done left to right for all components, treating absent components as ''0''. The empty pre-release is the earliest possible pre-release, making ''1.2-'' the earliest possible version in the ''1.2'' series, intended for comparison operand declarations. Build metadata is ignored for comparison as usual.
-  * ''='' as a leading character, or the lack of one, denoting an exact match,
+The following declarations are supported for version strings compatible with this semver superset:
-  * Version ranges - a set of space-delimited comparators of the ''>='', ''>'', ''<='', ''<'', ''='' or no prefix, following NPM behaviour and declaring an intersection of supported versions within the scope of the string,
-  * X-Ranges,
-  * Tilde Ranges,
-  * Caret Ranges.
+  * standalone ''<version>'', denoting an exact version match
+  * standard operators ''<operator><version>'' comparing to the declared version
+    * ''='', ''>='', ''>'', ''<''''='', ''<'' for equal, greater or equal, greater, less or equal, less
+    * ''^'' for same version and up within the same major version: ''^a.b.c'' is equivalent to ''>=a.b.c <(a+1).0.0-''
+    * ''~'' for same version and up within the same minor version: ''~a.b.c'' is equivalent to ''>=a.b.c <a.(b+1).0-''
+  * X-Ranges: ''<vcp>.x'', ''<vcp>.X'' or ''<vcp>.*'' for same ''<vcp>'' where ''<vcp>'' is ''<major>'' or ''<major>.<minor>'', e.g. ''1.x'' for ''>=1- <2-'' or ''1.2.x'' for ''>=1.2- <1.3-''. Additional trailing ''.x''/''.X''/''.*'' are allowed but have no effect
+All operators always work the same regardless of the version they are matching against, there is no special casing for ''0.x''.
 ==== Mandatory fields ====
@@ Line 94: / Line 98: @@
     * string values,
     * objects containing a "config" key (filename), as well as optional keys of the following types: "environment".
+  * **accessWidener**: A file path to an [[tutorial:accesswideners|access widener]] relative to the mod root. If not present, assume the mod has no access widener.
 ==== Optional fields (dependency resolution) ====