tree c2e620a27037cb858a472cab8f999a6927109d5a
parent ada842c539693968b9d968f54754a2b52810b73c
author Alexei Frolov <frolv@google.com> 1673036088 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1673036088 +0000

Implement string variable interpolater

This adds a `StringSub` struct which inserts variable mappings into a
format string and updates download targets' URLs to use it.

Change-Id: Ifc0064415a2e541efbeb349006824001dd54158b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/qg/+/125550
Commit-Queue: Alexei Frolov <frolv@google.com>
Reviewed-by: Erik Gilling <konkers@google.com>