alertmanager/asset/asset.go
Brad Ison c0a7b75c9c
Automate CSS-inlining for default HTML email template (#2798)
* Automate CSS-inlining for default HTML email template

The original HTML email template was added in `template/email.html`.
It looks like the CSS was manually inlined.  Most likely using the
premailer.dialect.ca web form, which is mentioned in the README for
the Mailgun transactional-email-templates project.  The resulting HTML
with inlined CSS was then copied into `template/default.tmpl`.  This
has resulted in `email.html` and `default.tmpl` diverging at times.

This commit adds build automation to inline the CSS automatically
using [juice][1].  The Go template containing the resulting HTML has
been moved into its own file to avoid the script that performs the CSS
inlining having to parse the `default.tmpl` file to insert it there.

Fixes #1939.

[1]: https://www.npmjs.com/package/juice

Signed-off-by: Brad Ison <bison@xvdf.io>

* Update asset/assets_vfsdata.go

Signed-off-by: Brad Ison <bison@xvdf.io>
2022-01-03 17:33:53 +01:00

51 lines
1.3 KiB
Go

// Copyright 2018 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build dev
// +build dev
package asset
import (
"net/http"
"os"
"strings"
"github.com/shurcooL/httpfs/filter"
"github.com/shurcooL/httpfs/union"
)
var static http.FileSystem = filter.Keep(
http.Dir("../ui/app"),
func(path string, fi os.FileInfo) bool {
return path == "/" ||
path == "/script.js" ||
path == "/index.html" ||
path == "/favicon.ico" ||
strings.HasPrefix(path, "/lib")
},
)
var templates http.FileSystem = filter.Keep(
http.Dir("../template"),
func(path string, fi os.FileInfo) bool {
return path == "/" || path == "/default.tmpl" || path == "/email.tmpl"
},
)
// Assets contains the project's assets.
var Assets http.FileSystem = union.New(map[string]http.FileSystem{
"/templates": templates,
"/static": static,
})