update build scripts and workflows for cmd/jail project structure

Updated all build tooling to work with the moved main.go:

## Files Updated

### Makefile
- Updated build target: ./cmd/jail instead of .
- Updated build-all target: all cross-platform builds use ./cmd/jail
- Version injection still works with -X main.version=

### Build Script (scripts/build.sh)
- Updated to build from ./cmd/jail directory
- All platform builds now use correct path

### GitHub Actions Workflows
- build.yml: Updated build command to use ./cmd/jail
- release.yml: Updated build command to use ./cmd/jail
- Version injection path remains main.version (package didn't change)

### README.md
- Updated build examples: go build -o jail ./cmd/jail
- Updated development section manual commands
- Updated Quick Start build example

## Tested
- ✅ make build works correctly
- ✅ ./scripts/build.sh creates all 4 binaries
- ✅ Version injection works (dev-dd5ba1d)
- ✅ Cross-platform builds succeed
- ✅ Tests run (though some may have existing issues)

## Compatibility
All existing workflows and build processes continue to work
with the new cmd/jail project structure. The change is fully
backward compatible from a user perspective.

Co-authored-by: f0ssel <[email protected]>

Author: blink-so[bot]

.github/workflows/build.yml

@@ -68,7 +68,7 @@ jobs:
         fi
         
         # Build using Go directly for cross-compilation
-        go build -ldflags="-s -w -X main.version=$VERSION" -o ${{ matrix.name }} .
+        go build -ldflags="-s -w -X main.version=$VERSION" -o ${{ matrix.name }} ./cmd/jail
 
     - name: Upload binary as artifact
       uses: actions/upload-artifact@v4

.github/workflows/release.yml

@@ -62,7 +62,7 @@ jobs:
         export CGO_ENABLED=0
         
         # Build using Go directly for cross-compilation
-        go build -ldflags="-s -w -X main.version=${{ github.ref_name }}" -o ${{ matrix.name }} .
+        go build -ldflags="-s -w -X main.version=${{ github.ref_name }}" -o ${{ matrix.name }} ./cmd/jail
 
     - name: Upload binary as artifact
       uses: actions/upload-artifact@v4

Makefile

@@ -15,7 +15,7 @@ all: build
 build:
 	@echo "Building $(BINARY_NAME) for current platform..."
 	@echo "Version: $(VERSION)"
-	go build -ldflags="$(LDFLAGS)" -o $(BINARY_NAME) .
+	go build -ldflags="$(LDFLAGS)" -o $(BINARY_NAME) ./cmd/jail
 	@echo "✓ Built $(BINARY_NAME)"
 
 # Build for all supported platforms
@@ -25,13 +25,13 @@ build-all:
 	@echo "Version: $(VERSION)"
 	@mkdir -p $(BUILD_DIR)
 	@echo "Building Linux amd64..."
-	GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/$(BINARY_NAME)-linux-amd64 .
+	GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/$(BINARY_NAME)-linux-amd64 ./cmd/jail
 	@echo "Building Linux arm64..."
-	GOOS=linux GOARCH=arm64 CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/$(BINARY_NAME)-linux-arm64 .
+	GOOS=linux GOARCH=arm64 CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/$(BINARY_NAME)-linux-arm64 ./cmd/jail
 	@echo "Building macOS amd64..."
-	GOOS=darwin GOARCH=amd64 CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/$(BINARY_NAME)-darwin-amd64 .
+	GOOS=darwin GOARCH=amd64 CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/$(BINARY_NAME)-darwin-amd64 ./cmd/jail
 	@echo "Building macOS arm64..."
-	GOOS=darwin GOARCH=arm64 CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/$(BINARY_NAME)-darwin-arm64 .
+	GOOS=darwin GOARCH=arm64 CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/$(BINARY_NAME)-darwin-arm64 ./cmd/jail
 	@echo "✓ All binaries built successfully!"
 	@echo "Binaries are in the '$(BUILD_DIR)' directory:"
 	@ls -la $(BUILD_DIR)/

README.md

@@ -31,7 +31,7 @@ sudo mv jail /usr/local/bin/
 ```bash
 git clone https://github.com/coder/jail
 cd jail
-make build  # or: go build -o jail .
+make build  # or: go build -o jail ./cmd/jail
 ```
 
 ### Usage
@@ -162,7 +162,7 @@ cd jail
 make build
 
 # Or directly with Go
-go build -o jail .
+go build -o jail ./cmd/jail
 ```
 
 ## Command-Line Options
@@ -207,14 +207,14 @@ make lint
 
 ```bash
 # Build directly with Go
-go build -o jail .
+go build -o jail ./cmd/jail
 
 # Run tests
 go test ./...
 
 # Cross-compile manually
-GOOS=linux GOARCH=amd64 go build -o jail-linux .
-GOOS=darwin GOARCH=amd64 go build -o jail-macos .
+GOOS=linux GOARCH=amd64 go build -o jail-linux ./cmd/jail
+GOOS=darwin GOARCH=amd64 go build -o jail-macos ./cmd/jail
 
 # Use build script for all platforms
 ./scripts/build.sh

scripts/build.sh

@@ -39,7 +39,7 @@ for config in "${configs[@]}"; do
 
     env GOOS="$goos" GOARCH="$goarch" CGO_ENABLED=0 go build \
         -ldflags="-s -w -X main.version=$VERSION" \
-        -o "$BUILD_DIR/$name" .
+        -o "$BUILD_DIR/$name" ./cmd/jail
 
     if [ $? -eq 0 ]; then
         size=$(du -h "$BUILD_DIR/$name" | cut -f1)