docs-v2/scripts/README-add-placeholders.md

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# Add Placeholders Script
Automatically adds placeholder syntax to code blocks and placeholder descriptions in markdown files.
## What it does
This script finds UPPERCASE placeholders in code blocks and:
1. **Adds `{ placeholders="PATTERN1|PATTERN2" }` attribute** to code block fences
2. **Wraps placeholder descriptions** with `{{% code-placeholder-key %}}` shortcodes
## Usage
### Direct usage
```bash
# Process a single file
node scripts/add-placeholders.js <file.md>
# Dry run to preview changes
node scripts/add-placeholders.js <file.md> --dry
# Example
node scripts/add-placeholders.js content/influxdb3/enterprise/admin/upgrade.md
```
### Using npm script
```bash
# Process a file
yarn docs:add-placeholders <file.md>
# Dry run
yarn docs:add-placeholders <file.md> --dry
```
## Example transformations
### Before
````markdown
```bash
influxdb3 query \
--database SYSTEM_DATABASE \
--token ADMIN_TOKEN \
"SELECT * FROM system.version"
```
Replace the following:
- **`SYSTEM_DATABASE`**: The name of your system database
- **`ADMIN_TOKEN`**: An admin token with read permissions
````
### After
````markdown
```bash { placeholders="ADMIN_TOKEN|SYSTEM_DATABASE" }
influxdb3 query \
--database SYSTEM_DATABASE \
--token ADMIN_TOKEN \
"SELECT * FROM system.version"
```
Replace the following:
- {{% code-placeholder-key %}}`SYSTEM_DATABASE`{{% /code-placeholder-key %}}: The name of your system database
- {{% code-placeholder-key %}}`ADMIN_TOKEN`{{% /code-placeholder-key %}}: An admin token with read permissions
````
## How it works
### Placeholder detection
The script automatically detects UPPERCASE placeholders in code blocks using these rules:
- **Pattern**: Matches words with 2+ characters, all uppercase, can include underscores
- **Excludes common words**: HTTP verbs (GET, POST), protocols (HTTP, HTTPS), SQL keywords (SELECT, FROM), etc.
### Code block processing
1. Finds all code blocks (including indented ones)
2. Extracts UPPERCASE placeholders
3. Adds `{ placeholders="..." }` attribute to the fence line
4. Preserves indentation and language identifiers
### Description wrapping
1. Detects "Replace the following:" sections
2. Wraps placeholder descriptions matching `- **`PLACEHOLDER`**: description`
3. Preserves indentation and formatting
4. Skips already-wrapped descriptions
## Options
- `--dry` or `-d`: Preview changes without modifying files
## Notes
- The script is idempotent - running it multiple times on the same file won't duplicate syntax
- Preserves existing `placeholders` attributes in code blocks
- Works with both indented and non-indented code blocks
- Handles multiple "Replace the following:" sections in a single file
## Related documentation
- [DOCS-SHORTCODES.md](../DOCS-SHORTCODES.md) - Complete shortcode reference
- [DOCS-CONTRIBUTING.md](../DOCS-CONTRIBUTING.md) - Placeholder conventions and style guidelines