use a more reliable host for zlib downloads

.github/workflows/build.yaml

@@ -26,9 +26,7 @@ jobs:
       - name: Setup ubuntu container
         run: |
           apt update -yqq
-          apt install -yqq build-essential make software-properties-common
-          add-apt-repository -y ppa:git-core/candidate
-          apt update -yqq && apt install -yqq git zip unzip zlib1g-dev zlib1g yasm curl sudo
+          apt install -yqq build-essential make git zip unzip zlib1g-dev zlib1g yasm curl sudo
 
       - name: Check out code
         uses: actions/checkout@v4.1.1
@@ -61,15 +59,24 @@ jobs:
 
       - name: Install dependencies
         run: |
-          apt update \
-            && apt install -yqq software-properties-common curl apt-transport-https lsb-release \
-            && curl -fsSl https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add - \
-            && add-apt-repository "deb https://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-14 main" \
-            && apt update \
-            && apt -yqq install \
-              nasm clang-14 clang-tools-14 lld-14 build-essential pkg-config autoconf git python3 \
-              gcc-mingw-w64 libgcc-9-dev-arm64-cross mingw-w64-tools gcc-mingw-w64-x86-64 \
-              build-essential pkg-config autoconf git xxd netcat-openbsd libnuma-dev cmake
+          apt update
+          apt install -yqq ca-certificates curl lsb-release
+
+          if ! apt-cache show clang-14 >/dev/null 2>&1; then
+            install -d -m 0755 /usr/share/keyrings
+            curl -fsSL --retry 5 --retry-delay 2 --connect-timeout 15 \
+              -o /usr/share/keyrings/apt.llvm.org.asc \
+              https://apt.llvm.org/llvm-snapshot.gpg.key
+            printf '%s\n' \
+              "deb [signed-by=/usr/share/keyrings/apt.llvm.org.asc] https://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-14 main" \
+              > /etc/apt/sources.list.d/llvm-toolchain-14.list
+            apt update
+          fi
+
+          apt install -yqq \
+            nasm clang-14 clang-tools-14 lld-14 build-essential pkg-config autoconf git python3 \
+            gcc-mingw-w64 libgcc-9-dev-arm64-cross mingw-w64-tools gcc-mingw-w64-x86-64 \
+            xxd netcat-openbsd libnuma-dev cmake
 
           update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-14 30 \
             && update-alternatives --install /usr/bin/clang clang /usr/bin/clang-14 30 \
@@ -91,7 +98,7 @@ jobs:
 
       - name: Download ML model
         run: |
-          curl -L https://github.com/livepeer/livepeer-ml/releases/latest/download/tasmodel.pb --output ./ffmpeg/tasmodel.pb
+          curl -fsSL --retry 5 --retry-delay 2 --connect-timeout 15 https://github.com/livepeer/livepeer-ml/releases/latest/download/tasmodel.pb --output ./ffmpeg/tasmodel.pb
 
       - name: Test
         shell: bash

install_ffmpeg.sh

@@ -127,7 +127,7 @@ if [[ "$GOOS" != "windows" && "$GOARCH" == "amd64" ]]; then
   if [[ ! -e "$ROOT/nasm-2.14.02" ]]; then
     # sudo apt-get -y install asciidoc xmlto # this fails :(
     cd "$ROOT"
-    curl -o nasm-2.14.02.tar.gz "https://gstreamer.freedesktop.org/src/mirror/nasm-2.14.02.tar.xz"
+    curl -fsSL --retry 5 --retry-delay 2 --connect-timeout 15 -o nasm-2.14.02.tar.gz "https://gstreamer.freedesktop.org/src/mirror/nasm-2.14.02.tar.xz"
     echo 'e24ade3e928f7253aa8c14aa44726d1edf3f98643f87c9d72ec1df44b26be8f5  nasm-2.14.02.tar.gz' >nasm-2.14.02.tar.gz.sha256
     sha256sum -c nasm-2.14.02.tar.gz.sha256
     tar xf nasm-2.14.02.tar.gz
@@ -156,7 +156,8 @@ fi
 
 if [[ ! -e "$ROOT/zlib-1.2.11" ]]; then
   cd "$ROOT"
-  curl -o zlib-1.2.11.tar.gz https://zlib.net/fossils/zlib-1.2.11.tar.gz
+  curl -fsSL --retry 5 --retry-delay 2 --connect-timeout 15 -o zlib-1.2.11.tar.gz https://github.com/madler/zlib/archive/refs/tags/v1.2.11.tar.gz
+  echo '629380c90a77b964d896ed37163f5c3a34f6e6d897311f1df2a7016355c45eff  zlib-1.2.11.tar.gz' | sha256sum -c
   tar xf zlib-1.2.11.tar.gz
   cd zlib-1.2.11
   ./configure --prefix="$ROOT/compiled" --static