install.sh: prefer x86_64-static binary by default (portable across libc versions)

The dynamic binary requires glibc 2.38+ — built on ubuntu-latest (2.39+), it refuses to load on Debian 12 (glibc 2.36), older Ubuntu, RHEL 8/9, etc. Hard portability ceiling for the one-liner installer. The musl-static binary (built on Alpine, attached as skeletonkey-x86_64-static) runs on every libc — verified Alpine → Debian/Ubuntu/Fedora/RHEL cross-distro. Costs ~800 KB extra (1.2 MB vs 390 KB) but eliminates the libc-version problem entirely. Default: install.sh now fetches the -static asset for x86_64. Override: SKELETONKEY_DYNAMIC=1 curl … | sh fetches the smaller dynamic binary (for hosts that have modern glibc and want the smaller download). arm64: no static variant attached yet (cross-compiling musl for aarch64 needs a separate toolchain); install.sh still fetches the dynamic arm64 binary, which works on most modern arm64 distros (raspberry-pi / aws graviton / etc.).
install.sh: POSIX-compatible 'set -o pipefail' so 'curl | sh' works
2026-05-23 00:28:36 -04:00 · 2026-05-23 00:24:58 -04:00
1 changed files with 19 additions and 2 deletions
@@ -19,7 +19,12 @@
 #   0 — installed successfully
 #   1 — error (unsupported arch, download failure, permission denied)

-set -euo pipefail
+# POSIX-friendly: -eu is universal, pipefail only on shells that
+# support it (bash, ksh, dash >= 0.5.12). Without pipefail the
+# installer still exits on the first hard error since every curl/
+# tar/install step is checked explicitly.
+set -eu
+(set -o pipefail) 2>/dev/null && set -o pipefail || true

 REPO="${SKELETONKEY_REPO:-KaraZajac/SKELETONKEY}"
 VERSION="${SKELETONKEY_VERSION:-latest}"
@@ -32,7 +37,19 @@ fail()  { printf '[\033[1;31m-\033[0m] %s\n' "$*" >&2; exit 1; }
 # Detect architecture
 arch=$(uname -m)
 case "$arch" in
-    x86_64|amd64)        target=x86_64 ;;
+    # x86_64 default: the musl-static binary works on every libc
+    # (glibc 2.x of any version, musl, uclibc) — costs ~800 KB extra
+    # vs the dynamic build but eliminates the GLIBC_2.NN portability
+    # ceiling that bit users on Debian-stable / older RHEL hosts.
+    # Set SKELETONKEY_DYNAMIC=1 to fetch the smaller dynamic build
+    # (needs glibc >= 2.38, i.e. Ubuntu 24.04 / Debian 13 / RHEL 10).
+    x86_64|amd64)
+        if [ "${SKELETONKEY_DYNAMIC:-0}" = "1" ]; then
+            target=x86_64
+        else
+            target=x86_64-static
+        fi
+        ;;
    aarch64|arm64)       target=arm64  ;;
    *) fail "Unsupported architecture: $arch (only x86_64 and arm64 currently)" ;;
 esac