Jrv Yaml Toolkit

Full-featured YAML toolkit for validating, formatting, converting, merging, and querying YAML files. Supports YAML-to-JSON, JSON-to-YAML, schema validation, path queries, and multi-document YAML.

Everything you need to work with YAML files: validate syntax, format/prettify, convert to/from JSON, query with dot-path expressions, merge multiple files, and check against a schema.

Quick Start

# Validate YAML syntax
python3 scripts/yaml_toolkit.py validate config.yaml

# Format/prettify YAML
python3 scripts/yaml_toolkit.py format messy.yaml

# Convert YAML to JSON
python3 scripts/yaml_toolkit.py to-json config.yaml

# Convert JSON to YAML
python3 scripts/yaml_toolkit.py from-json data.json

# Query a value by dot-path
python3 scripts/yaml_toolkit.py get config.yaml "server.host"

# Set a value
python3 scripts/yaml_toolkit.py set config.yaml "server.port" 8080

# Merge multiple YAML files (later files override earlier)
python3 scripts/yaml_toolkit.py merge base.yaml override.yaml

# Lint against a simple schema file
python3 scripts/yaml_toolkit.py lint config.yaml --schema schema.yaml

# List all keys (flattened dot-path)
python3 scripts/yaml_toolkit.py keys config.yaml

# Minify YAML (single-line flow style)
python3 scripts/yaml_toolkit.py minify config.yaml

Commands

Command	Description
validate <file>	Check YAML syntax, report errors with line numbers
format <file>	Pretty-print YAML with consistent indentation
to-json <file>	Convert YAML to JSON
from-json <file>	Convert JSON to YAML
get <file> <path>	Get value at dot-path (e.g. server.host)
set <file> <path> <val>	Set value at dot-path, output updated YAML
merge <file1> <file2> ...	Deep-merge YAML files (right overrides left)
lint <file> --schema <s>	Validate keys against a schema YAML
keys <file>	List all keys as flattened dot-paths
minify <file>	Output compact single-line YAML

Options

Flag	Description
--output <file>	Write output to file instead of stdout
--indent N	Indentation spaces (default: 2)
--allow-unicode	Allow unicode in output (default: true)

Use Cases

• DevOps: Validate Kubernetes and Docker Compose configs before applying
• CI/CD: Merge environment-specific YAML overrides
• Config management: Query and patch config values programmatically
• Data pipelines: Convert between JSON and YAML for different tools
• Documentation: List all config keys for auto-generated docs

Exit Codes

• 0 — Success
• 1 — Validation error or key not found
• 2 — File not found or parse error