From 44b4c9ff267783236b88d9edfb388c539f3a8dc2 Mon Sep 17 00:00:00 2001
From: Zach Loafman <zml@google.com>
Date: Wed, 1 Apr 2015 17:29:22 -0700
Subject: [PATCH] Parallelize architectures in "make release"

On my desktop, this took the KUBE_RELEASE_RUN_TESTS=n
"make release" down from 172s to 115s
---
 build/common.sh    | 39 ++++++++++++++++++++++-----------------
 hack/lib/golang.sh | 18 ++++++++++++++++--
 2 files changed, 38 insertions(+), 19 deletions(-)

diff --git a/build/common.sh b/build/common.sh
index 365639d56be..9bd8b420260 100644
--- a/build/common.sh
+++ b/build/common.sh
@@ -511,30 +511,35 @@ function kube::release::package_client_tarballs() {
    # Find all of the built client binaries
   local platform platforms
   platforms=($(cd "${LOCAL_OUTPUT_BINPATH}" ; echo */*))
-  for platform in "${platforms[@]}" ; do
+  for platform in "${platforms[@]}"; do
     local platform_tag=${platform/\//-} # Replace a "/" for a "-"
-    kube::log::status "Building tarball: client $platform_tag"
+    kube::log::status "Starting tarball: client $platform_tag"
 
-    local release_stage="${RELEASE_STAGE}/client/${platform_tag}/kubernetes"
-    rm -rf "${release_stage}"
-    mkdir -p "${release_stage}/client/bin"
+    (
+      local release_stage="${RELEASE_STAGE}/client/${platform_tag}/kubernetes"
+      rm -rf "${release_stage}"
+      mkdir -p "${release_stage}/client/bin"
 
-    local client_bins=("${KUBE_CLIENT_BINARIES[@]}")
-    if [[ "${platform%/*}" == "windows" ]]; then
-      client_bins=("${KUBE_CLIENT_BINARIES_WIN[@]}")
-    fi
+      local client_bins=("${KUBE_CLIENT_BINARIES[@]}")
+      if [[ "${platform%/*}" == "windows" ]]; then
+        client_bins=("${KUBE_CLIENT_BINARIES_WIN[@]}")
+      fi
 
-    # This fancy expression will expand to prepend a path
-    # (${LOCAL_OUTPUT_BINPATH}/${platform}/) to every item in the
-    # KUBE_CLIENT_BINARIES array.
-    cp "${client_bins[@]/#/${LOCAL_OUTPUT_BINPATH}/${platform}/}" \
-      "${release_stage}/client/bin/"
+      # This fancy expression will expand to prepend a path
+      # (${LOCAL_OUTPUT_BINPATH}/${platform}/) to every item in the
+      # KUBE_CLIENT_BINARIES array.
+      cp "${client_bins[@]/#/${LOCAL_OUTPUT_BINPATH}/${platform}/}" \
+        "${release_stage}/client/bin/"
 
-    kube::release::clean_cruft
+      kube::release::clean_cruft
 
-    local package_name="${RELEASE_DIR}/kubernetes-client-${platform_tag}.tar.gz"
-    kube::release::create_tarball "${package_name}" "${release_stage}/.."
+      local package_name="${RELEASE_DIR}/kubernetes-client-${platform_tag}.tar.gz"
+      kube::release::create_tarball "${package_name}" "${release_stage}/.."
+    ) &
   done
+
+  kube::log::status "Waiting on tarballs"
+  wait || { kube::log::error "client tarball creation failed"; exit 1; }
 }
 
 # Package up all of the server binaries
diff --git a/hack/lib/golang.sh b/hack/lib/golang.sh
index fc21bfd5636..54ad20a8dc0 100644
--- a/hack/lib/golang.sh
+++ b/hack/lib/golang.sh
@@ -313,10 +313,11 @@ kube::golang::build_binaries() {
     local binaries
     binaries=($(kube::golang::binaries_from_targets "${targets[@]}"))
 
+    kube::log::status "Building go targets for ${platforms[@]} in parallel (output will appear in a burst when complete):" "${targets[@]}"
     local platform
-    for platform in "${platforms[@]}"; do
+    for platform in "${platforms[@]}"; do (
       kube::golang::set_platform_envs "${platform}"
-      kube::log::status "Building go targets for ${platform}:" "${targets[@]}"
+      kube::log::status "${platform}: Parallel go build started"
 
       local -a statics=()
       local -a nonstatics=()
@@ -369,6 +370,19 @@ kube::golang::build_binaries() {
                 "${statics[@]:+${statics[@]}}"
           fi
       fi
+      kube::log::status "${platform}: Parallel go build finished"
+      ) &> "/tmp//${platform//\//_}.build" &
     done
+
+    local fails=0
+    for job in $(jobs -p); do
+      wait ${job} || let "fails+=1"
+    done
+
+    for platform in "${platforms[@]}"; do
+      cat "/tmp//${platform//\//_}.build"
+    done
+
+    exit ${fails}
   )
 }