feat: add gdu static musl build + generalize publish_release.py

.gitea/workflows/gdu.yml

@@ -0,0 +1,69 @@
+name: gdu static musl build
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - .gitea/workflows/gdu.yml
+      - scripts/build_gdu.sh
+      - versions/gdu.version
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  build-and-release:
+    runs-on: alpine-latest
+
+    steps:
+      - name: Bootstrap workspace
+        shell: sh
+        env:
+          REPO_URL: ${{ gitea.server_url }}
+          REPO_NAME: ${{ gitea.repository }}
+          GIT_SHA: ${{ gitea.sha }}
+        run: |
+          apk add --no-cache git
+          workdir="$(pwd)"
+          tmpdir="$(mktemp -d)"
+          git clone --depth 1 "$REPO_URL/$REPO_NAME.git" "$tmpdir/repo"
+          git -C "$tmpdir/repo" fetch --depth 1 origin "$GIT_SHA"
+          git -C "$tmpdir/repo" checkout "$GIT_SHA"
+          find "$workdir" -mindepth 1 -maxdepth 1 -exec rm -rf {} +
+          cp -a "$tmpdir/repo"/. "$workdir"/
+
+      - name: Read version
+        id: meta
+        shell: sh
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          version="$(tr -d ' \n\r' < versions/gdu.version)"
+          artifact="gdu-${version}-linux-amd64-musl-static"
+          echo "version=${version}" >> "$GITHUB_OUTPUT"
+          echo "artifact=${artifact}" >> "$GITHUB_OUTPUT"
+
+      - name: Build static gdu
+        shell: sh
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          chmod +x scripts/build_gdu.sh
+          ./scripts/build_gdu.sh "${{ steps.meta.outputs.version }}" "$PWD/dist"
+
+      - name: Publish release assets
+        shell: sh
+        env:
+          GITEA_TOKEN: ${{ gitea.token }}
+          GITEA_API_URL: ${{ gitea.api_url }}
+          REPO_OWNER: ${{ gitea.repository_owner }}
+          REPO_NAME: static-musl-builds
+          TOOL: gdu
+          VERSION: ${{ steps.meta.outputs.version }}
+          TARGET_SHA: ${{ gitea.sha }}
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          python3 scripts/publish_release.py \
+            "dist/${{ steps.meta.outputs.artifact }}" \
+            "dist/${{ steps.meta.outputs.artifact }}.tar.gz" \
+            "dist/${{ steps.meta.outputs.artifact }}.sha256"

.gitea/workflows/iperf3.yml

@@ -59,6 +59,7 @@ jobs:
           GITEA_API_URL: ${{ gitea.api_url }}
           REPO_OWNER: ${{ gitea.repository_owner }}
           REPO_NAME: static-musl-builds
+          TOOL: iperf3
           VERSION: ${{ steps.meta.outputs.version }}
           TARGET_SHA: ${{ gitea.sha }}
         working-directory: ${{ gitea.workspace }}

scripts/build_gdu.sh

@@ -0,0 +1,57 @@
+#!/bin/sh
+set -eu
+
+VERSION="${1:?usage: build_gdu.sh <version> [output_dir]}"
+OUTPUT_DIR="${2:-$PWD/dist}"
+PREFIX_NAME="gdu-${VERSION}-linux-amd64-musl-static"
+
+# strip leading 'v' if passed
+VERSION="${VERSION#v}"
+
+mkdir -p "$OUTPUT_DIR"
+
+apk add --no-cache \
+  curl \
+  file \
+  go \
+  git \
+  tar \
+  xz
+
+# gdu uses Go modules, pull source from GitHub
+SRCDIR="${TMPDIR:-/tmp}/gdu-src-${VERSION}"
+rm -rf "$SRCDIR"
+mkdir -p "$SRCDIR"
+
+curl -fsSL "https://github.com/dundee/gdu/archive/refs/tags/v${VERSION}.tar.gz" \
+  | tar -xz -C "$SRCDIR" --strip-components=1
+
+cd "$SRCDIR"
+
+# Build fully static with musl toolchain
+# CGO_ENABLED=0 forces pure-Go, which means no C deps at all
+# ldflags: strip debug + disable dynamic linking
+CGO_ENABLED=0 GOARCH=amd64 GOOS=linux \
+  go build \
+    -trimpath \
+    -ldflags="-s -w -extldflags=-static" \
+    -o "$OUTPUT_DIR/$PREFIX_NAME" \
+    ./cmd/gdu
+
+strip "$OUTPUT_DIR/$PREFIX_NAME" 2>/dev/null || true
+
+(
+  cd "$OUTPUT_DIR"
+  tar -czf "${PREFIX_NAME}.tar.gz" "$PREFIX_NAME"
+  sha256sum "$PREFIX_NAME" "${PREFIX_NAME}.tar.gz" > "${PREFIX_NAME}.sha256"
+)
+
+file "$OUTPUT_DIR/$PREFIX_NAME"
+ldd "$OUTPUT_DIR/$PREFIX_NAME" || true
+
+if file "$OUTPUT_DIR/$PREFIX_NAME" | grep -qi 'dynamically linked'; then
+  echo "error: output binary is still dynamically linked" >&2
+  exit 1
+fi
+
+echo "build OK: $OUTPUT_DIR/$PREFIX_NAME"

scripts/publish_release.py

@@ -93,10 +93,11 @@ def main() -> int:
     if missing:
         raise SystemExit(f"missing files: {', '.join(missing)}")
 
-    tag = f"iperf3-v{version}"
+    tool = os.environ.get("TOOL", "iperf3")
-    title = f"iperf3 {version}"
+    tag = f"{tool}-v{version}"
+    title = f"{tool} {version}"
     body = (
-        f"Static musl build for iperf3 {version}.\\n\\n"
+        f"Static musl build for {tool} {version}.\\n\\n"
         f"Repository: {owner}/{repo}\\n"
         f"Commit: {target}"
     )

versions/gdu.version

@@ -0,0 +1 @@
+5.36.1