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66 lines
3.2 KiB
Markdown
66 lines
3.2 KiB
Markdown
# 0.NEXT.0: Sometime
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- supports self-referential substitutions, such as
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`path=${path}":/bin"`, by "looking backward" to the previous
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value of `path`
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- supports concatenating arrays and merging objects within a
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single value. So you can do `path=${path} [ "/bin" ]` for
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example. See README and spec for more details.
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- supports `+=` where `path+="/bin"` expands to `path=${?path}
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[ "/bin" ]`
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- supports `include url("http://example.com/")`, `include
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file("/my/file.conf")`, and `include classpath("whatever")`.
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This syntax forces treatment as URL, file, or classpath
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resource.
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- supports `include "http://example.com/whatever.conf"` (if an
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include is a valid URL, it's loaded as such). This is
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incompatible with prior versions, if you have a filename that
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is also a valid URL, it would have loaded previously but now
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it will not. Use the `include file("")` syntax to force
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treatment as a file.
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- class loaders are now recursively inherited through include
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statements; previously, even if you set a custom class loader
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when parsing a file, it would not be used for parsing a
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classpath resource included from the file.
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- parseString() and parseReader() now support include statements
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in the parsed string or reader
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- in -Dconfig.resource=name, name can start with a "/" or not,
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doesn't matter
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- if you implement ConfigIncluder, you should most likely also
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implement ConfigIncluderFile, ConfigIncluderURL, and
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ConfigIncluderClasspath. You should also use
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ConfigIncludeContext.parseOptions() if appropriate.
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- cycles in include statements (self-includes) are now detected
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and result in a nicer error instead of stack overflow
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- the serialization format has changed for a Config that has not
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had resolve() called on it. The library can still deserialize
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the old format, but old versions of the library will not be
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able to deserialize the new format. Serializing unresolved
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Config is probably a bad idea anyway and maybe shouldn't even
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be supported, but keeping it for back compat.
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- since 0.3.0, there is an obscure incompatible semantic change
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in that self-referential substitutions where the cycle could
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be broken by partially resolving the object now "look backward"
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and may fail to resolve. This is not incompatible with the
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version included in Play/Akka 2.0 because in that version this
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obscure case just threw an exception. But in 0.3.0 there
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were cases that worked that now work differently. You are very
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unlikely to be affected by this.
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# 0.3.0: March 1, 2012
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- ConfigFactory methods now use the thread's context class loader
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by default, and have overloads so you can specify a class
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loader. Because jars may come with "reference.conf" in the jar,
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a config must always be loaded with the same class loader as
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the jar using the config.
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- ConfigValue instances are now serializable
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- new methods ConfigObject.withoutKey, ConfigObject.withOnlyKey,
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Config.withoutPath, Config.withOnlyPath allow subsetting
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configs more easily.
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- better handle complex interdependent substitutions (the
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`${foo}` syntax) without getting confused; just about anything
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that makes conceptual sense should now work. Only inherently
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circular config files should fail.
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- some minor documentation fixes.
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