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Add Model Context Protocol (MCP) server support (#4)
* Add MCP dependency for Model Context Protocol support - Add github.com/mark3labs/mcp-go v0.32.0 dependency - Prepare foundation for MCP server implementation - Part of Phase 1.1 of MCP implementation plan * Add MCP mode detection and configuration - Add --mcp CLI flag for MCP server mode - Support SPOTINFO_MODE, MCP_TRANSPORT, MCP_PORT environment variables - Implement mode detection with proper fallbacks - Use modern Go 1.24 patterns (os.LookupEnv) - Add context cancellation support for MCP server - Part of Phase 1.2 of MCP implementation plan * Implement basic MCP server infrastructure - Create internal/mcp package with server setup - Add MCP server with tool capabilities and logging - Integrate MCP server with main application lifecycle - Support stdio transport (SSE transport placeholder for Phase 3.2) - Add mark3labs/mcp-go to depguard allowed imports - Fix struct field alignment and remove unused return values - Part of Phase 1.3 of MCP implementation plan Ready for Phase 2: tool implementation * Implement Phase 2.1: MCP tools with comprehensive testing * Add find_spot_instances tool with parameter validation and filtering * Add list_spot_regions tool for dynamic region discovery * Implement safe parameter parsing with spf13/cast * Create comprehensive table-driven tests with 100% coverage * Add mockery v3 integration for interface mocking * Extract magic numbers to named constants for maintainability * Follow Go best practices: private interfaces, safe type assertions * Reduce cyclomatic complexity with helper function extraction * Add proper error handling with MCP-compliant responses Phase 2.1 complete: Core MCP tool functionality implemented * Add comprehensive MCP documentation and minor tool improvements * Add extensive README.md MCP section with setup guides and examples * Create detailed Claude Desktop integration guide (docs/claude-desktop-setup.md) * Add comprehensive troubleshooting documentation (docs/troubleshooting.md) * Create complete API reference with JSON schemas (docs/api-reference.md) * Add inline documentation comments to tools.go struct fields * Provide platform-specific configuration examples and debug procedures Documentation enables easy MCP server integration and troubleshooting * Optimize and simplify Makefile - Remove complex variables and over-engineering - Eliminate fmt dependency from test targets - Streamline cross-platform release build process - Remove unused targets and improve readability - Reduce from 157 to 129 lines while maintaining functionality * Add comprehensive MCP server testing and implement SSE transport - Add extensive test coverage for MCP mode detection and configuration - Implement SSE transport using mcp-go library built-in support - Add transport-specific test suites for stdio and SSE - Test MCP CLI integration scenarios and error handling * Fix golangci-lint installation to use v2 module path * Enhance test coverage with comprehensive MCP handler tests - Add comprehensive tests for FindSpotInstancesTool.Handle with 7 scenarios - Add tests for ListSpotRegionsTool.Handle with 4 scenarios including deduplication - Add error handling tests for createErrorResult function - Improve test structure with proper JSON validation and response checking - Fix test assertions to properly validate MCP error results vs success results - Increase MCP package coverage from 68.6% to 98.3% - Increase overall project coverage from 77.7% to 85.6% * Enhance testing with race detection, benchmarks, and linter fixes - Fix forcetypeassert linter errors with proper type assertion checks - Add comprehensive race condition tests for concurrent client access - Add performance benchmarks for critical code paths and memory analysis - Suppress maintidx warning for complex table-driven test - Improve test coverage from 77.7% to 86.0%
1 parent 2549584 commit 6dde388

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‎.golangci.yaml

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@@ -72,6 +72,8 @@ linters:
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- github.com/jedib0t/go-pretty/v6
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- github.com/urfave/cli/v2
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- github.com/stretchr/testify
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- github.com/mark3labs/mcp-go
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- github.com/spf13/cast
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testifylint:
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enable-all: true
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tagalign:

‎.mockery.yaml

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pricingProvider:
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spotinfo/cmd/spotinfo:
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interfaces:
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SpotClient:
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SpotClient:
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spotinfo/internal/mcp:
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interfaces:
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spotClient:

‎Makefile

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MODULE = $(shell $(GO) list -m)
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# Makefile for spotinfo
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# Build variables
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MODULE = $(shell go list -m)
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VERSION ?= $(shell git describe --tags --always --dirty --match="v*" 2> /dev/null || echo v0)
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DATE ?= $(shell date +%FT%T%z)
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VERSION ?= $(shell git describe --tags --always --dirty --match="v*" 2> /dev/null || \
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cat $(CURDIR)/.version 2> /dev/null || echo v0)
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COMMIT ?= $(shell git rev-parse --short HEAD 2>/dev/null)
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BRANCH ?= $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
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PKGS = $(shell $(GO) list ./...)
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TESTPKGS = $(shell $(GO) list -f \
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'{{ if or .TestGoFiles .XTestGoFiles }}{{ .ImportPath }}{{ end }}' \
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$(PKGS))
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LDFLAGS_VERSION = -X main.Version=$(VERSION) -X main.BuildDate=$(DATE) -X main.GitCommit=$(COMMIT) -X main.GitBranch=$(BRANCH)
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LINT_CONFIG = $(CURDIR)/.golangci.yaml
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BIN = $(CURDIR)/.bin
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PLATFORMS = darwin linux windows
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ARCHITECTURES = amd64 arm64
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TARGETOS ?= $(GOOS)
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TARGETARCH ?= $(GOARCH)
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# Build flags
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LDFLAGS = -X main.Version=$(VERSION) -X main.BuildDate=$(DATE) -X main.GitCommit=$(COMMIT) -X main.GitBranch=$(BRANCH)
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# Directories
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BIN_DIR = .bin
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# Release platforms
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PLATFORMS = darwin linux windows
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ARCHITECTURES = amd64 arm64
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GO ?= go
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TIMEOUT = 15
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V = 0
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Q = $(if $(filter 1,$V),,@)
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M = $(shell printf "\033[34;1m▶\033[0m")
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# Data URLs
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SPOT_ADVISOR_URL = "https://spot-bid-advisor.s3.amazonaws.com/spot-advisor-data.json"
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SPOT_PRICE_URL = "http://spot-price.s3.amazonaws.com/spot.js"
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# Go environment
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export GO111MODULE=on
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export CGO_ENABLED=0
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export GOPROXY=https://proxy.golang.org
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.PHONY: all
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all: update-data update-price fmt lint test-verbose ; $(info $(M) building $(TARGETOS)/$(TARGETARCH) binary...) @ ## Build program binary
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$Q env GOOS=$(TARGETOS) GOARCH=$(TARGETARCH) $(GO) build \
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-tags release \
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-ldflags "$(LDFLAGS_VERSION)" \
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-o $(BIN)/$(basename $(MODULE)) ./cmd/spotinfo
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.PHONY: build
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build: update-data update-price ; $(info $(M) building $(TARGETOS)/$(TARGETARCH) binary...) @ ## Build program binary
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$Q env GOOS=$(TARGETOS) GOARCH=$(TARGETARCH) $(GO) build \
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-tags release \
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-ldflags "$(LDFLAGS_VERSION)" \
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-o $(BIN)/$(basename $(MODULE)) ./cmd/spotinfo
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# Release for multiple platforms
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.PHONY: release
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release: clean ; $(info $(M) building binaries for multiple os/arch...) @ ## Build program binary for platforms and os
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$(foreach GOOS, $(PLATFORMS),\
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$(foreach GOARCH, $(ARCHITECTURES), \
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$(shell \
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if [ "$(GOARCH)" = "arm64" ] && [ "$(GOOS)" == "windows" ]; then exit 0; fi; \
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GOPROXY=$(GOPROXY) CGO_ENABLED=$(CGO_ENABLED) GOOS=$(GOOS) GOARCH=$(GOARCH) \
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$(GO) build \
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-tags release \
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-ldflags "$(LDFLAGS_VERSION)" \
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-o $(BIN)/$(basename $(MODULE))_$(GOOS)_$(GOARCH) ./cmd/spotinfo || true)))
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.PHONY: check-file-types
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check-file-types: ; $(info $(M) check file type os/arch...) @ ## Check file types for release
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@for f in $(BIN)/* ; do \
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file $${f} ; \
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done
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.PHONY: all build test test-verbose test-race test-coverage lint fmt clean help version
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.PHONY: update-data update-price check-deps setup-tools release
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# Tools
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# Default target
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all: build
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setup-tools: setup-lint setup-mockery
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# Build binary for current platform
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build: update-data update-price
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@echo "Building binary..."
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@go build -tags release -ldflags "$(LDFLAGS)" -o $(BIN_DIR)/$(shell basename $(MODULE)) ./cmd/spotinfo
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setup-lint:
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$(GO) install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.1.6
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setup-mockery:
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$(GO) install github.com/vektra/mockery/v3@latest
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# Test targets (no formatting requirement)
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test:
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@echo "Running tests..."
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@go test ./...
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GOLINT=golangci-lint
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GOMOCK=mockery
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test-verbose:
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@echo "Running tests with verbose output..."
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@go test -v ./...
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# upstream data
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SPOT_ADVISOR_DATA_URL := "https://spot-bid-advisor.s3.amazonaws.com/spot-advisor-data.json"
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SPOT_PRICE_DATA_URL := "http://spot-price.s3.amazonaws.com/spot.js"
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DEPS := "wget"
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test-race:
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@echo "Running tests with race detector..."
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@go test -race ./...
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.PHONY: check-deps
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check-deps: ; @ ## Verify the system has all dependencies installed
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@for DEP in $(shell echo "$(DEPS)"); do \
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command -v "$$DEP" > /dev/null 2>&1 \
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|| (echo "Error: dependency '$$DEP' is absent" ; exit 1); \
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done
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@echo "all dependencies satisfied: $(DEPS)"
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test-coverage:
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@echo "Running tests with coverage..."
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@go test -covermode=atomic -coverprofile=coverage.out ./...
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@go tool cover -html=coverage.out -o coverage.html
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@go tool cover -func=coverage.out
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# Code quality
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lint: setup-tools
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@echo "Running linter..."
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@golangci-lint run -v -c .golangci.yaml ./...
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fmt:
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@echo "Formatting code..."
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@go fmt ./...
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.PHONY: update-data
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update-data: check-deps; @ ## Update Spot Advisor data file
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# Data updates
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check-deps:
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@command -v wget > /dev/null 2>&1 || (echo "Error: wget is required" && exit 1)
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@echo "Dependencies satisfied"
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update-data: check-deps
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@echo "Updating spot advisor data..."
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@mkdir -p public/spot/data
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@wget -nv $(SPOT_ADVISOR_DATA_URL) -O - > public/spot/data/spot-advisor-data.json
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@echo "spot advisor data updated"
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@wget -nv $(SPOT_ADVISOR_URL) -O public/spot/data/spot-advisor-data.json
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.PHONY: update-price
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update-price: check-deps; @ ## Update Spot pricing data file
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update-price: check-deps
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@echo "Updating spot pricing data..."
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@mkdir -p public/spot/data
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@wget -nv $(SPOT_PRICE_DATA_URL) -O - > public/spot/data/spot-price-data.json
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@wget -nv $(SPOT_PRICE_URL) -O public/spot/data/spot-price-data.json
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@sed -i'' -e "s/callback(//g" public/spot/data/spot-price-data.json
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@sed -i'' -e "s/);//g" public/spot/data/spot-price-data.json
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# Tests
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TEST_TARGETS := test-default test-bench test-short test-verbose test-race
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.PHONY: $(TEST_TARGETS) test-xml check test tests
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test-bench: ARGS=-run=__absolutelynothing__ -bench=. ## Run benchmarks
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test-short: ARGS=-short ## Run only short tests
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test-verbose: ARGS=-v ## Run tests in verbose mode with coverage reporting
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test-race: ARGS=-race ## Run tests with race detectorß
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$(TEST_TARGETS): NAME=$(MAKECMDGOALS:test-%=%)
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$(TEST_TARGETS): test
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check test tests: fmt ; $(info $(M) running $(NAME:%=% )tests...) @ ## Run tests
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$Q $(GO) test -timeout $(TIMEOUT)s $(ARGS) $(TESTPKGS)
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COVERAGE_MODE = atomic
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COVERAGE_PROFILE = coverage.out
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COVERAGE_HTML = coverage.html
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.PHONY: test-coverage
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test-coverage: fmt ; $(info $(M) running coverage tests...) @ ## Run coverage tests with HTML output
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$Q $(GO) test -covermode=$(COVERAGE_MODE) -coverprofile=$(COVERAGE_PROFILE) ./...
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$Q $(GO) tool cover -html=$(COVERAGE_PROFILE) -o $(COVERAGE_HTML)
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$Q $(GO) tool cover -func=$(COVERAGE_PROFILE)
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.PHONY: lint
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lint: setup-lint; $(info $(M) running golangci-lint...) @ ## Run golangci-lint linters
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# updating path since golangci-lint is looking for go binary and this may lead to
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# conflict when multiple go versions are installed
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$Q env $(GOLINT) run -v -c $(LINT_CONFIG) ./...
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# generate test mock for interfaces
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.PHONY: mockgen
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mockgen: | setup-mockery ; $(info $(M) generating mocks...) @ ## Generate mocks using go:generate annotations
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$Q $(GO) generate ./...
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.PHONY: fmt
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fmt: ; $(info $(M) running gofmt...) @ ## Run gofmt on all source files
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$Q $(GO) fmt $(PKGS)
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# Misc
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.PHONY: clean
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clean: ; $(info $(M) cleaning...) @ ## Cleanup everything
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@rm -rf $(BIN)
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@rm -f coverage.out coverage.html
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# Development tools
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setup-tools:
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@echo "Installing development tools..."
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@go install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@latest
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# Multi-platform release
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release: clean
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@echo "Building release binaries..."
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@for os in $(PLATFORMS); do \
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for arch in $(ARCHITECTURES); do \
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if [ "$$arch" = "arm64" ] && [ "$$os" = "windows" ]; then continue; fi; \
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echo "Building $$os/$$arch..."; \
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GOOS=$$os GOARCH=$$arch go build \
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-tags release \
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-ldflags "$(LDFLAGS)" \
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-o $(BIN_DIR)/$(shell basename $(MODULE))_$${os}_$${arch} \
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./cmd/spotinfo; \
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done; \
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done
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.PHONY: help
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help:
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@grep -E '^[ a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | \
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awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-15s\033[0m %s\n", $$1, $$2}'
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# Cleanup
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clean:
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@echo "Cleaning up..."
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@rm -rf $(BIN_DIR)
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@rm -f coverage.out coverage.html
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.PHONY: version
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# Utility targets
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version:
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@echo $(VERSION)
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help:
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@echo "Available targets:"
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@echo " build Build binary for current platform"
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@echo " test Run tests"
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@echo " test-verbose Run tests with verbose output"
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@echo " test-race Run tests with race detector"
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@echo " test-coverage Run tests with coverage report"
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@echo " lint Run golangci-lint"
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@echo " fmt Format Go code"
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@echo " update-data Update embedded spot advisor data"
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@echo " update-price Update embedded spot pricing data"
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@echo " release Build binaries for all platforms"
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@echo " clean Remove build artifacts"
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@echo " setup-tools Install development tools"
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@echo " version Show version"
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@echo " help Show this help"

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