Add air-based dev mode for automatic rebuilds

Add .air.toml config and a `just dev` target that watches .go and
.templ files and automatically regenerates templates and rebuilds
the application on changes.

Author: pierres

.air.toml

@@ -0,0 +1,7 @@
+[build]
+pre_cmd = ["go tool templ generate"]
+cmd = "go build -tags production -o ./tmp/pkgstatsd ."
+entrypoint = ["./tmp/pkgstatsd"]
+include_ext = ["go", "templ"]
+exclude_dir = [".idea", "dist", "node_modules", "tmp"]
+exclude_regex = ["_templ\\.go$"]

README.md

@@ -8,7 +8,8 @@ the Arch Linux package statistics website.
 # Setup
 1. Run `just init` to install dependencies, build and generate fixtures
 2. Run `just run` to start the application locally
-3. Run `just` for a full list of available commands
+3. Run `just dev` to watch for template and Go changes and rebuild automatically (requires [air](https://github.com/air-verse/air))
+4. Run `just` for a full list of available commands
 
 # Contributions
 For contributing you'll probably want to test your changes at least once

justfile

@@ -36,6 +36,10 @@ build: build-assets build-templates
 run:
     go run -tags production .
 
+# watch for template and Go changes and rebuild automatically
+dev:
+    air
+
 # run all tests
 test:
     go test ./...