mqtt-exporter/Dockerfile.dev-simple at main · d0ugal/mqtt-exporter · GitHub

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# Simple development Dockerfile
# This builds mqtt-exporter with the ability to use a local promexporter via volume mount
#
# Usage:
# 1. Mount promexporter as volume: -v /home/hoose/Code/promexporter:/go/src/github.com/d0ugal/promexporter
# 2. Or use docker-compose with the dev service

FROM golang:1.26.1-alpine@sha256:2389ebfa5b7f43eeafbd6be0c3700cc46690ef842ad962f6c5bd6be49ed82039

WORKDIR /app

# Install git for version detection
RUN apk add --no-cache git

# Copy go mod files
COPY go.mod go.sum ./

# Download dependencies (will use remote promexporter initially)
RUN go mod download

# Copy source code
COPY . .

# Create a script that can switch between local and remote promexporter
RUN echo '#!/bin/sh' > /app/build.sh && \
    echo 'if [ -d "/go/src/github.com/d0ugal/promexporter" ]; then' >> /app/build.sh && \
    echo '  echo "Using local promexporter from volume mount"' >> /app/build.sh && \
    echo '  go mod edit -replace github.com/d0ugal/promexporter=/go/src/github.com/d0ugal/promexporter' >> /app/build.sh && \
    echo 'else' >> /app/build.sh && \
    echo '  echo "Using remote promexporter"' >> /app/build.sh && \
    echo 'fi' >> /app/build.sh && \
    echo 'go mod download' >> /app/build.sh && \
    echo 'VERSION=${VERSION:-$(git describe --tags --always --dirty 2>/dev/null || echo "dev")}' >> /app/build.sh && \
    echo 'COMMIT=${COMMIT:-$(git rev-parse --short HEAD 2>/dev/null || echo "unknown")}' >> /app/build.sh && \
    echo 'BUILD_DATE=${BUILD_DATE:-$(date -u +"%Y-%m-%dT%H:%M:%SZ")}' >> /app/build.sh && \
    echo 'CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo \' >> /app/build.sh && \
    echo '  -ldflags="-s -w \' >> /app/build.sh && \
    echo '    -X github.com/d0ugal/mqtt-exporter/internal/version.Version=$VERSION \' >> /app/build.sh && \
    echo '    -X github.com/d0ugal/mqtt-exporter/internal/version.Commit=$COMMIT \' >> /app/build.sh && \
    echo '    -X github.com/d0ugal/mqtt-exporter/internal/version.BuildDate=$BUILD_DATE" \' >> /app/build.sh && \
    echo '  -o mqtt-exporter ./cmd/main.go' >> /app/build.sh && \
    chmod +x /app/build.sh

# Expose port
EXPOSE 8080

# Default command builds and runs
CMD ["/app/build.sh"]