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# sass 0.3.1
This small patch release changes `sass::sass_cache_context_dir()` to use `tools::R_user_dir()` over `rappdirs::user_cache_dir()` (when relevant, as requested by CRAN). (#70)
# sass 0.3.0
This release improves the caching of CSS compilation in `sass()`. Previously, caching was (by default) enabled in non-`interactive()` sessions and was allowed to grow indefinitely within `tempdir()` (i.e., within an R session). Now, caching is enabled by default in both interactive and non-interactive R sessions. In most cases, the cache will be stored in a user-level cache directory and persist across R sessions. In some cases (such as deployment on Shiny Server or Connect), the cache will be stored in a subdirectory of the application named `cache/`, to eliminate the risk of cache poisoning across applications. For more information about where the cache is stored, see `?sass_cache_get`.
Although caching is now enabled by default, it still may not be desirable while developing Sass code, because of the possibility of a false positive. (For more, see the Caching section of `?sass`) Caching can be disabled with `options(sass.cache = FALSE)`. Also, to help reduce the chance of a false positive in caching, `sass()` now includes a `cache_key_extra` parameter which may be used to pass information that the Sass `input` may not capture, such as file imports.
Other improvements include:
* Added support for Shiny Developer Mode by turning off sass caching by default. To enable Shiny Developer Mode, call `options(shiny.devmode = TRUE)` (or `shiny::devmode(TRUE)`). (Related rstudio/shiny#3174, #68)
* A new `output_template()` function for more convenient `output` path creation that is `cache` and `options` aware.
* When `sass()` has a cache hit, and `output` is specified, the cached file is now simply copied to `output` at the OS level (previously, `sass()` was reading the cache file into R, then writing it to `output`). (#42)
* Added `sass_bundle()` to collect `sass_layer()`(s) and/or `sass_bundle()`(s) into a single Sass bundle. When creating a bundle, any of the child layers/bundles may be named, so they can be later removed via `sass_bundle_remove()`. (#54)
* `sass_layer()` now returns a `sass_bundle()` containing a single Sass layer. To test for `sass_bundle()` output, use `is_sass_bundle()`. (#54)
## Breaking changes
* When `output` is specified, `sass()` now returns the output file path instead of the CSS content as a character vector.
* The `cache_options` argument in `sass()` has been renamed to `cache` and now defaults to `sass_cache_get()` instead of `sass_cache_options()`.
* `sass_cache_options()` has been deprecated (it no longer does anything) in favor of the new caching functions (`sass_file_cache()`).
* Deprecated `sass_layer_merge()` in favor of `sass_bundle()` to reflect the data structures being returned. (#54)
* Deprecated the `tags` parameter of `sass_layer()` in favor of named layers in `sass_bundle(NAME = layer)`. (#54)
# sass 0.2.0
* Added new `sass_layer()` and `sass_layer_merge()` functions. See [here](https://rstudio.github.io/sass/articles/sass.html#layers) for more details.
* The objects that `sass()` and `as_sass()`) return now have better print methods in **rmarkdown**. See [here](https://rstudio.github.io/sass/articles/sass.html#rmarkdown) for more details.
* Added the ability for `sass()` to retain `htmltools::htmlDependency()`s attached to it's `input`.
* Fixed an issue with incorrect handling of length 2 or more character vector input (#37).
# sass 0.1.2
* No significant changes other than CRAN compliance.
# sass 0.1.1
* First release.
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