Skip to content

ci: make musl toolchain/zlib downloads resilient to musl.cc outages #148

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
rahlk merged 1 commit into from
Jun 8, 2026
Merged

ci: make musl toolchain/zlib downloads resilient to musl.cc outages #148

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
34 changes: 30 additions & 4 deletions .github/scripts/setup-musl.sh
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,9 +21,30 @@ esac
PREFIX=/opt/musl
mkdir -p "$PREFIX"

toolchain_url="https://musl.cc/${MUSL_TRIPLE}-native.tgz"
echo "setup-musl: downloading toolchain $toolchain_url"
curl -fsSL "$toolchain_url" | tar -xz -C "$PREFIX" --strip-components=1
# Download a file, trying each mirror in turn with retries. musl.cc is chronic-
# ally flaky (the first release run died on "connect to musl.cc timed out"), so
# a GitHub-hosted mirror is tried first — GitHub is reliably reachable from CI.
# `--retry-all-errors` is avoided on purpose: the manylinux_2_28 container ships
# curl 7.61, which predates that flag. Plain `--retry` covers transient timeouts.
fetch() {
dest="$1"; shift
for url in "$@"; do
echo "setup-musl: fetching $url"
if curl -fL --retry 5 --retry-delay 3 --connect-timeout 20 --max-time 600 \
-o "$dest" "$url"; then
return 0
fi
echo "setup-musl: mirror failed, trying next" >&2
done
echo "setup-musl: all mirrors failed for ${dest##*/}" >&2
return 1
}

toolchain_tgz="$(mktemp --suffix=.tgz)"
fetch "$toolchain_tgz" \
"https://github.com/musl-cc/musl.cc/releases/download/v0.0.1/${MUSL_TRIPLE}-native.tgz" \
"https://musl.cc/${MUSL_TRIPLE}-native.tgz"
tar -xzf "$toolchain_tgz" -C "$PREFIX" --strip-components=1

export PATH="$PREFIX/bin:$PATH"
echo "$PREFIX/bin" >> "$GITHUB_PATH"
Expand All @@ -33,7 +54,12 @@ echo "$PREFIX/bin" >> "$GITHUB_PATH"
ZLIB_VERSION=1.3.1
workdir="$(mktemp -d)"
echo "setup-musl: building static zlib ${ZLIB_VERSION} with ${MUSL_TRIPLE}-gcc"
curl -fsSL "https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz" | tar -xz -C "$workdir" --strip-components=1
zlib_tgz="$(mktemp --suffix=.tar.gz)"
fetch "$zlib_tgz" \
"https://github.com/madler/zlib/releases/download/v${ZLIB_VERSION}/zlib-${ZLIB_VERSION}.tar.gz" \
"https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz" \
"https://zlib.net/fossils/zlib-${ZLIB_VERSION}.tar.gz"
tar -xzf "$zlib_tgz" -C "$workdir" --strip-components=1
(
cd "$workdir"
CC="${MUSL_TRIPLE}-gcc" ./configure --static --prefix="$PREFIX"
Expand Down