mirror of
https://codeberg.org/PGPainless/sop-java.git
synced 2024-11-19 13:52:05 +01:00
59 lines
2.5 KiB
Markdown
59 lines
2.5 KiB
Markdown
<!--
|
|
SPDX-FileCopyrightText: 2021 Paul Schaub <vanitasvitae@fsfe.org>
|
|
|
|
SPDX-License-Identifier: Apache-2.0
|
|
-->
|
|
|
|
# External-SOP
|
|
|
|
Access an external SOP binary from within your Java/Kotlin application.
|
|
|
|
This module implements a backend for `sop-java` that binds to external SOP binaries (such as
|
|
[sqop](https://gitlab.com/sequoia-pgp/sequoia-sop/), [python-sop](https://pypi.org/project/sop/) etc.).
|
|
SOP operation calls will be delegated to the external binary, and the results are parsed back, so that you can
|
|
access them from your Java application as usual.
|
|
|
|
## Example
|
|
Let's say you are using `ExampleSOP` which is a binary installed in `/usr/bin/example-sop`.
|
|
Instantiating a `SOP` object is as simple as this:
|
|
|
|
```java
|
|
SOP sop = new ExternalSOP("/usr/bin/example-sop");
|
|
```
|
|
|
|
This SOP object can now be used as usual (see [here](../sop-java/README.md)).
|
|
|
|
Keep in mind the license of the external SOP binary when integrating one with your project!
|
|
|
|
Some SOP binaries might require additional configuration, e.g. a Java based SOP might need to know which JAVA_HOME to use.
|
|
For this purpose, additional environment variables can be passed in using a `Properties` object:
|
|
|
|
```java
|
|
Properties properties = new Properties();
|
|
properties.put("JAVA_HOME", "/usr/lib/jvm/[...]");
|
|
SOP sop = new ExternalSOP("/usr/bin/example-sop", properties);
|
|
```
|
|
|
|
Most results of SOP operations are communicated via standard-out, standard-in. However, some operations rely on
|
|
writing results to additional output files.
|
|
To handle such results, we need to provide a temporary directory, to which those results can be written by the SOP,
|
|
and from which `External-SOP` reads them back.
|
|
The default implementation relies on `Files.createTempDirectory()` to provide a temporary directory.
|
|
It is however possible to overwrite this behavior, in order to specify a custom, perhaps more private directory:
|
|
|
|
```java
|
|
ExternalSOP.TempDirProvider provider = new ExternalSOP.TempDirProvider() {
|
|
@Override
|
|
public File provideTempDirectory() throws IOException {
|
|
File myTempDir = new File("/path/to/directory");
|
|
myTempDir.mkdirs();
|
|
return myTempDir;
|
|
}
|
|
};
|
|
SOP sop = new ExternalSOP("/usr/bin/example-sop", provider);
|
|
```
|
|
|
|
## Testing
|
|
The `external-sop` module comes with a growing test suite, which tests SOP binaries against the expectations of the SOP specification.
|
|
To configure one or multiple backends for use with the test suite, just provide a custom `config.json` file in `src/main/resources/sop/external`.
|
|
An example configuration file with the required file format is available as `config.json.example`.
|