defmodule Hemmer do
@moduledoc """
Rust-powered email HTML transformation pipeline.
Takes HTML — optionally with Tailwind utility classes — and runs it through
a pipeline of transformations to produce email-client-ready output: CSS
inlining, table attribute defaults, Outlook conditional comments, `rem` to
`px` conversion, and more.
## Functions
- `process_tailwind/1` — generates Tailwind CSS from classes, inlines it,
applies all email transforms
- `process_tailwind_minified/1` — same with HTML minification
- `process/1` — for HTML that already has CSS (no Tailwind generation)
- `inline_css/1` — only inline CSS, no other transforms
## Example
html = \"\"\"
\"\"\"
{:ok, result} = Hemmer.process_tailwind(html)
"""
version = Mix.Project.config()[:version]
use RustlerPrecompiled,
otp_app: :hemmer,
crate: "hemmer_nif",
base_url: "https://github.com/ringvold/hemmer/releases/download/v#{version}",
force_build: System.get_env("HEMMER_BUILD") in ["1", "true"],
version: version,
targets:
~w(
aarch64-apple-darwin
aarch64-unknown-linux-gnu
x86_64-apple-darwin
x86_64-unknown-linux-gnu
),
nif_versions: ["2.15", "2.16", "2.17"]
@doc """
Process HTML with Tailwind utility classes into email-ready HTML.
Generates CSS from Tailwind classes, inlines it, and applies all
email-client compatibility transformations.
"""
def process_tailwind(_html), do: :erlang.nif_error(:nif_not_loaded)
@doc """
Same as `process_tailwind/1` but with HTML minification.
"""
def process_tailwind_minified(_html), do: :erlang.nif_error(:nif_not_loaded)
@doc """
Process email HTML that already has CSS in `