• Remove these from your current workflow:
• - The entire “Copy golang sources” section
• - make package/lang/golang/compile
• Build golang once

Yes! You can significantly reduce build time by pre-building the Golang package and reusing it across runs. Here’s how to implement this optimization:

1. Create a Pre-Build Workflow (.github/workflows/prebuild-golang.yml):

name: Prebuild Golang
on:
workflow_dispatch:
schedule:
- cron: ‘0 0 * * 0’ # Weekly rebuild
push:
paths:
- ‘lang/golang/**’

jobs:
prebuild:
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v4

- name: Setup SDK
  uses: ./.github/actions/your-sdk-setup-action
  with:
    model: gl-mt3000 # Use your most common target

- name: Build Golang IPK
  run: |
    SDK_PATH="/tmp/openwrt-sdk/..." # Your SDK path logic
    make -C \(SDK_PATH package/lang/golang/compile V=s -j\)(nproc)

- name: Upload Artifact
  uses: actions/upload-artifact@v3
  with:
    name: prebuilt-golang
    path: ${{ SDK_PATH }}/bin/packages/**/golang*.ipk

2. Modify Your Main Workflow:

• name: Get Prebuilt Golang
  uses: actions/download-artifact@v3
  with:
  name: prebuilt-golang
  path: ${{ SDK_PATH }}/bin/packages/

• name: Install Prebuilt Golang
  run: |
  opkg install ${{ SDK_PATH }}/bin/packages//golang.ipk
  shell: bash

§Remove these from your current workflow:

§- The entire “Copy golang sources” section

§- make package/lang/golang/compile

3. Optimize Docker Cache (Even Better Approach):

FROM openwrt-sdk-base AS builder

§Build golang once

RUN make package/lang/golang/compile

FROM openwrt-sdk-base AS runtime
COPY –from=builder /sdk/bin/packages/ /sdk/bin/packages/

4. Implement Local Cache (Alternative):

• name: Cache Golang
  uses: actions/cache@v3
  with:
  path: |
  ${{ SDK_PATH }}/build_dir/target-/golang
  \({{ SDK_PATH }}/staging_dir/target-*/golang* key: golang-\){{ hashFiles(‘lang/golang/*’) }}

Expected Time Savings:

StepOriginal TimeOptimized TimeGolang Compilation8-10 mins0-30 secsDependency Resolution2-3 mins0-15 secsTotal Savings10 mins1 min

Verification Steps:

Add debug output after installation:

• name: Verify Golang Installation
  run: |
  ls -la ${{ SDK_PATH }}/staging_dir/target-/bin/go
  file ${{ SDK_PATH }}/staging_dir/target-/bin/go
  \({{ SDK_PATH }}/staging_dir/target-*/bin/go version Monitor build logs for: Checking 'golang'... already installed Skipping package golang dependencies Important Considerations: Version Pinning: Add a hash check in your workflow: - name: Verify Package Integrity run: | echo "golang_checksum=\)(sha256sum bin/packages//golang.ipk)“ >> \(GITHUB_OUTPUT shell: bash Cross-architecture Support: Store separate packages for each target: # In prebuild job ARCH_SUFFIX=\)(echo \(TARGET | md5sum | cut -c1-6) mv golang*.ipk golang-\)ARCH_SUFFIX.ipk

This optimization should reduce your build times by 80-90% while maintaining build reproducibility.