docs: documented the now built-in bash helper script and the tools it comes with

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# Bash Prompt Helpers
When creating bash based tools, it's often helpful to prompt the user for input or confirmation.
Loki comes pre-packaged with a handful of prompt helpers for your bash-based tools. These helpers
can be used to prompt the user for various types of input, such as yes/no confirmations,
text input, and selections from a list.
The utility script is located at `functions/utils/prompt-utils.sh` within your Loki `functions` directory.
The Loki `functions` directory varies between machines, so you can find its location on your system by running the following command in your terminal:
```shell
loki --info | grep functions_dir | awk '{print $2}'
```
## Quick Links
<!--toc:start-->
- [Import The Prompt Utils Into Your Tools Script](#import-the-prompt-utils-into-your-tools-script)
- [Included Utility Functions](#included-utility-functions)
- [input](#input)
- [confirm](#confirm)
- [list](#list)
- [checkbox](#checkbox)
- [password](#password)
- [editor](#editor)
- [with_validate](#with_validate)
- [validate_present](#validate_present)
- [detect_os](#detect_os)
- [get_opener](#get_opener)
- [open_link](#open_link)
- [guard_operation](#guard_operation)
- [guard_path](#guard_path)
- [patch_file](#patch_file)
- [error](#error)
- [warn](#warn)
- [info](#info)
- [debug](#debug)
- [trace](#trace)
- [Colored Output](#colored-output)
<!--toc:end-->
---
## Import The Prompt Utils Into Your Tools Script
In order to use the bash prompt helpers in your bash scripts, you need to source the provided `prompt-utils.sh` script.
This script is pre-packaged with Loki and is located [here](../../assets/functions/utils/prompt-utils.sh).
When sourcing the file in your bash script, you use the `LLM_PROMPT_UTILS_FILE` environment variable that automatically
populates the `functions/utils/prompt-utils.sh` path for you.
Thus, to properly source and enable all the bash prompt helpers in your Bash tools, add the following prelude to your
scripts:
```bash
source "$LLM_PROMPT_UTILS_FILE"
```
## Included Utility Functions
Below are the built-in bash prompt helpers that can be used to enhance user interaction with your tool scripts.
### input
Prompt for text input
![Prompt Utils Input](../images/tools/prompt-utils-input.png)
**Example With Validation:**
```bash
text=$(with_validation 'input "Please enter something:"' validate_present)
```
**Example Without Validation:**
```bash
text=$(input "Please enter something:")
```
### confirm
Show a confirm dialog with options for yes/no
![Prompt Utils Confirm](../images/tools/prompt-utils-confirm.png)
**Example:**
```bash
confirmed=$(confirm "Do the thing?")
if [[ $confirmed == "0" ]]; then echo "No"; else echo "Yes"; fi
```
### list
Renders a text based list of options that can be selected by the user using up, down, and enter
keys that then returns the chosen option.
![Prompt Utils List](../images/tools/prompt-utils-list.png)
**Example:**
```bash
options=("one" "two" "three" "four")
choice=$(list "Select an item" "${options[@]}")
echo "Your choice: ${options[$choice]}"
```
### checkbox
Render a text based list of options, where multiple options can be selected by the user using down, up,
and enter keys that then returns the chosen options.
![Prompt Utils Checkbox](../images/tools/prompt-utils-checkbox.png)
**Example:**
```bash
options=("one" "two" "three" "four")
checked=$(checkbox "Select one or more items" "${options[@]}")
echo "Your choices: ${checked}"
```
### password
Show a password prompt displaying stars for each character typed.
![Prompt Utils Password](../images/tools/prompt-utils-password.png)
**Example With Validation:**
```bash
validate_password() {
if [[ ${#1} -lt 10 ]]; then
echo "Password must be at least 10 characters"
exit 1
fi
}
pass=$(with_validate 'password "Enter your password"' validate_password)
```
**Example Without Validation:**
```bash
pass="$(password "Enter your password:")"
```
### editor
Open the default editor (`$EDITOR`); if none is set, default back to `vi`
**Example:**
```bash
text=$(editor "Please enter something in the editor")
echo -e "You wrote:\n${text}"
```
### with_validate
Evaluate the given prompt command with validation. This prompts the user for input until the
validation functions returns 0.
![Prompt Utils With-validate](../images/tools/prompt-utils-with-validate.png)
**Example:**
```bash
# Using the built-in 'validate_present' validator
text=$(with_validate 'input "Please enter something and confirm with enter"' validate_present)
# Using a custom validator; e.g. for password
validate_password() {
if [[ ${#1} -lt 10 ]]; then
echo "Password needs to be at least 10 characters"
exit 1
fi
}
pass=$(with_validate 'password "Enter random password"' validate_password)
```
### validate_present
Validate that the prompt returned a value.
![Prompt Utils Validate-Present](../images/tools/prompt-utils-validate-present.png)
**Example:**
```bash
text=$(with_validate 'input "Please enter something and confirm with enter"' validate_present)
```
### detect_os
Detect the current OS.
Returns one of the following:
* `solaris`
* `macos`
* `linux`
* `bsd`
* `windows`
* `unknown`
**Example:**
```bash
detect_os
```
### get_opener
Determines the Os-specific file opening command (i.e. the command to open anything)
**Example:**
```bash
# Returns 'xdg-open'
get_opener
```
### open_link
Opens the given link in the default browser
**Example:**
```bash
open_link https://www.google.com
```
### guard_operation
Prompt for permission to run an operation
**Example:**
```bash
guard_operation "Execute SQL?"
_run_sql
```
### guard_path
Prompt for permission to perform path operations
**Example:***
```bash
guard_path "$target_path" "Remove '$target_path'?"
rm -rf "$target_path"
```
### patch_file
Patch a file and show a diff using the default diff viewer. Uses git diff syntax.
**Example:**
```bash
new_contents="$(patch_file "$path" file.patch)"
```
### error
Log an error
![Prompt Utils Error](../images/tools/prompt-utils-error.png)
### warn
Log a warning
![Prompt Utils Warning](../images/tools/prompt-utils-warning.png)
### info
Log info
![Prompt Utils Info](../images/tools/prompt-utils-info.png)
### debug
Log a debug message
![Prompt Utils Debug](../images/tools/prompt-utils-debug.png)
### trace
Log a trace message
![Prompt Utils Trace](../images/tools/prompt-utils-trace.png)
### Colored Output
The following commands allow users to output text in specific colors.
* `red`
* `green`
* `gold`
* `blue`
* `magenta`
* `cyan`
* `white`
**Example:**
```bash
red "This will be red"
yellow "This will be yellow"
```
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