[Feature] Graph Node Dev Mode: Minimal Setup Local Subgraph Deployment with --watch Support

[incrypto32]

Description

Graph Node Dev Mode will make local subgraph development way easier. This mode will let devs iterate fast by watching file changes and auto-redeploying subgraphs no more messing around with IPFS or PostgreSQL config.

Goal

Let developers develop and deploy subgraphs locally with:

• No IPFS dependency
• No manual PostgreSQL setup ( Still need to install postgres )
• Super minimal configuration

Current Scope

• Add --watch flag to gnd
• When used:
  • Watches the build/ directory for any chanes
  • Auto redeploys the subgraph to local graph-node whenever files change
  • Shows the subgraph and GraphiQL URLs for immediate testing
• Subgraphs deploy straight from filesystem (no IPFS)
• Rebuilds still require manual triggering via gnd build
• Use pg_temp to:
  • Make a temporary Postgres instance inside build folder
  • Eliminate user database configuration

Tasks

• Create seperate graphnode-dev binary
• Refactor existing main function for reuse in new binary
• Make filesystem-based IPFS link resolver for subgraph deployment
• Add file watching code to trigger redeploys when files change
• Add logic to kill/restart node cleanly when files update
• Plug in pg_temp to auto provision temporary databases
• Support for Grafting
• Support for subgraph composition locally
• Implement build pipeline to build the new binary
• Graph CLI to install this binary
• Build filesystem-based IPFS client (for file data sources)

This will significantly improve the local development experience by removing configuration barriers.

Are you aware of any blockers that must be resolved before implementing this feature? If so, which? Link to any relevant GitHub issues.

No response

Some information to help us out

• Tick this box if you plan on implementing this feature yourself.
• I have searched the issue tracker to make sure this issue is not a duplicate.