mirror of
https://github.com/StackExchange/dnscontrol.git
synced 2025-01-31 12:00:21 +08:00
98 lines
2.5 KiB
Markdown
98 lines
2.5 KiB
Markdown
---
|
|
name: require
|
|
parameters:
|
|
- path
|
|
ts_ignore: true
|
|
---
|
|
|
|
`require(...)` loads the specified JavaScript or JSON file, allowing
|
|
to split your configuration across multiple files.
|
|
|
|
If the supplied `path` string ends with `.js`, the file is interpreted
|
|
as JavaScript code, almost as though its contents had been included in
|
|
the currently-executing file. If the path string ends with `.json`,
|
|
`require()` returns the `JSON.parse()` of the file's contents.
|
|
|
|
If the path string begins with a `.`, it is interpreted relative to
|
|
the currently-loading file (which may not be the file where the
|
|
`require()` statement is, if called within a function), otherwise it
|
|
is interpreted relative to the program's working directory at the time
|
|
of the call.
|
|
|
|
{% code title="dnsconfig.js" %}
|
|
```javascript
|
|
require('kubernetes/clusters.js');
|
|
|
|
D("mydomain.net", REG, PROVIDER,
|
|
IncludeKubernetes()
|
|
);
|
|
```
|
|
{% endcode %}
|
|
|
|
{% code title="kubernetes/clusters.js" %}
|
|
```javascript
|
|
require('./clusters/prod.js');
|
|
require('./clusters/dev.js');
|
|
|
|
function IncludeKubernetes() {
|
|
return [includeK8Sprod(), includeK8Sdev()];
|
|
}
|
|
```
|
|
{% endcode %}
|
|
|
|
{% code title="kubernetes/clusters/prod.js" %}
|
|
```javascript
|
|
function includeK8Sprod() {
|
|
return [
|
|
// ...
|
|
];
|
|
}
|
|
```
|
|
{% endcode %}
|
|
|
|
{% code title="kubernetes/clusters/dev.js" %}
|
|
```javascript
|
|
function includeK8Sdev() {
|
|
return [
|
|
// ...
|
|
];
|
|
}
|
|
```
|
|
{% endcode %}
|
|
|
|
You can also use it to require JSON files and initialize variables with it:
|
|
|
|
{% code title="dnsconfig.js" %}
|
|
```javascript
|
|
var domains = require('./domain-ip-map.json')
|
|
|
|
for (var domain in domains) {
|
|
D(domain, REG, PROVIDER,
|
|
A("@", domains[domain])
|
|
);
|
|
}
|
|
```
|
|
{% endcode %}
|
|
|
|
{% code title="domain-ip-map.json" %}
|
|
```javascript
|
|
{
|
|
"mydomain.net": "1.1.1.1",
|
|
"myotherdomain.org": "5.5.5.5"
|
|
}
|
|
```
|
|
{% endcode %}
|
|
|
|
# Future
|
|
|
|
It might be better to rename the function to something like
|
|
`include()` instead, (leaving `require` as a deprecated alias) because
|
|
by analogy it is *much* closer to PHP's `include()` function than it
|
|
is to node's `require()`. After all, the reason node.js calls it
|
|
"require" is because it's a declarative statement saying the file is
|
|
needed, and so should be loaded if it hasn't already been loaded.
|
|
|
|
In contrast, DNSControl's `require()` is actually an imperative command to
|
|
load the file and execute the code or parse the data from it. (So if
|
|
two files both `require("./tools.js")`, for example, then it will be
|
|
loaded twice, whereas in node.js it would only be loaded once.)
|