# Version
This page is about the internal WaspScripts versioning system.

It's unlikely you need to touch any of the version values and this page is
mostly for information purposes.

The only information that should probably be useful to you is the following
section {ref}`Loading script versions`.


- - -

## Loading script versions
You can specify which Simba and WaspLib version a script was designed for in 2
ways:
- Define `{$DEFINE SCRIPT_SIMBA_VERSION := 'COMMIT_SHORT_HASH'}` and `{$DEFINE SCRIPT_WASPLIB_VERSION := 'YYYY.MM.DD-COMMIT_SHORT_HASH'}`
- Run Simba with the following environment variables `SCRIPT_SIMBA_VERSION=COMMIT_SHORT_HASH` and `SCRIPT_WASPLIB_VERSION=YYYY.MM.DD-COMMIT_SHORT_HASH`.

Normally, during development you don't really need to care about any of this and
when running scripts, it's assumed you will be using
[wasp-launcher](https://github.com/WaspScripts/wasp-launcher) which takes care
of this for you by launching simba with the environment variables required.

If for some reason you need this during local development, it's recommended to
define the compiler directives, just make sure you remove them before you
release the script as it will interfere with the environment variables the
launcher will run Simba with.


- - -

## Version Date Constants
```pascal
WL_VERSION_YEAR
WL_VERSION_MONTH
WL_VERSION_DAY
```
Should be self explanatory but each holds a part of the data of the current
WaspLib version.


- - -

## Commit Hash Constants
```pascal
WL_VERSION_COMMIT_HASH
```
Should be self explanatory but holds the shortened hash of the commit that has
created the current WaspLib version.


- - -

## Current Versions
```pascal
SIMBA_VERSION
WASPLIB_VERSION
```
Holds the full Simba and WaspLib versions.
- For WaspLib and WaspScripts, the Simba commit short hash is treated as it's
version.


- - -

## Script versions
```pascal
SCRIPT_SIMBA_VERSION
SCRIPT_WASPLIB_VERSION
```
Holds the required full Simba and WaspLib versions for the current script.
- For WaspLib and WaspScripts, the Simba commit short hash is treated as it's
version.