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# Thumbnail generation tool for `slcl`
This directory defines a separation application to be used in conjunction with
`slcl`, aimed to update the thumbnail database automatically whenever files
are added/removed to/from the database.
### Root permissions
This application requires no `root` permissions. So, in order to avoid the
risk for security bugs, **please do not run this application as `root`**.
## Requirements
- A POSIX environment.
- [`dynstr`](https://gitea.privatedns.org/xavi92/dynstr)
(provided as a `git` submodule).
- MagickCore
- CMake (optional).
### Ubuntu / Debian
#### Mandatory packages
```sh
sudo apt install build-essential libmagickcore-6.q16-dev
```
#### Optional packages
```sh
sudo apt install cmake
```
## How to use
### Build
Similarly to `slcl`, two build environments are provided - feel free to choose
any of them:
- A mostly POSIX-compliant [`Makefile`](Makefile).
- A [`CMakeLists.txt`](CMakeLists.txt).
`thumbnail` can be built using the standard build process:
#### Make
```sh
$ make
```
#### CMake
```sh
$ mkdir build/
$ cmake ..
$ cmake --build .
```
## Usage
This tool only consumes one argument: the directory containing the instance
database, which must be the same used by `slcl`. For example:
```sh
thumbnail ~/my-db
```
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