Add examples for every command.

README.md

@@ -14,14 +14,58 @@ bautils arguments count -- $fruits
 
 ### Date
 
+```sh
+# Outputs the current date with the ISO 8601 format.
+bautils date now
+
+# Set a custom format using `-f` or `--format`.
+bautils date now -f '%F %T'
+```
+
 ### Directory
 
+```sh
+# Checks whether a directory exists, returning an exit code of 1
+# when it doesn't. This specifically checks for a directory so if
+# a path exists but it isn't a directory this will also return 1.
+bautils directory exists 'source'
+```
+
 ### File
 
+```sh
+# Checks whether a file exists, with the same logic as the
+# `directory exists` command.
+bautils file exists 'Cargo.toml'
+
+# Returns metadata of a file, for example `--modified` returning
+# when the file was last modified.
+bautils file metadata 'Cargo.toml' --modified
+
+# Returns parts of a file name.
+bautils file parts 'source/main.rs' --directory # Outputs: source
+bautils file parts 'source/main.rs' --basename  # Outputs: main
+bautils file parts 'source/main.rs' --extension # Outputs: rs
+```
+
 ### Log
 
+```sh
+# Logs data to a file, creating the file if it doesn't exist.
+bautils log -- 'The data to log!'
+
+# The log file can be specified with `-f` or `--file`.
+bautils log -f 'logfile.txt' -- 'More data!'
+```
+
 ### Match
 
+```sh
+# Matches a regular expression, returning an exit code of 1 if it
+# is succesful.
+bautils match regex --pattern '\d' '123'
+```
+
 ## License
 
 Distributed under the [AGPL-3.0-or-later](https://spdx.org/licenses/AGPL-3.0-or-later.html) license, see [LICENSE](https://git.bauke.xyz/Bauke/bautils/src/branch/main/LICENSE) for more information.