tzdata packages and templates

This directory contains the GN templates that provide data files for packages and underlying programs that need to load IANA timezone data as provided by the ICU library.

Provide ICU time zone resource files to the given package

The files metaZones.res, timezoneTypes.res, and zoneinfo64.res will be made available in the namespace of the target component(s).

When using config-data, the data will be available at: /config/data/tzdata/icu/{data_version}/{format}/.

There will also be a file at /config/data/tzdata/revision.txt containing the time zone database revision ID, e.g. 2019c.

When using resources, the data will be available at: /pkg/data/tzdata/icu/{data_version}/{format}/.

There will also be a file at /pkg/data/tzdata/revision.txt containing the time zone database revision ID, e.g. 2019c.

Common parameters for GN templates:

• data_version (optional)
  [string] The ICU version number of the time zone data.
  Currently supported: { "44" }
  Default: "44"

• format (optional)
  [string] The format name.
  Currently supported: { "le" }. le = “Little-endian”
  Default: "le"

In the future, these templates may support newer versions or different formats (e.g. txt).

Example:

icu_tzdata_config_data("icu_tzdata_for_web_runner") {
  for_pkg = "web_runner"
  data_version = "44"
  format = "le"
}

Additionally, testonly packages can be declared like so:

icu_tzdata_config_data("icu_tzdata_for_web_runner_test") {
  for_pkg = "web_runner_test"
  data_version = "44"
  format = "le"
  testonly = true
}

This injects an additional file /config/data/FUCHSIA_IN_TREE_TEST or /pkg/data/FUCHSIA_IN_TREE_TEST.