From 847c49dd01f984ac10e195569b49c7f1bdf33335 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Wed, 11 Dec 2019 08:33:58 +0300
Subject: refactor build/boost/build_travis.sh

---
 build/boost/build_travis.sh | 61 ++++++++++++++++++++++++++++++++++-----------
 1 file changed, 46 insertions(+), 15 deletions(-)

diff --git a/build/boost/build_travis.sh b/build/boost/build_travis.sh
index 1491bc8..267262d 100755
--- a/build/boost/build_travis.sh
+++ b/build/boost/build_travis.sh
@@ -15,35 +15,66 @@
 set -o errexit -o nounset -o pipefail -o xtrace
 
 readonly base_dir="$HOME"
-readonly boost_fs="boost_${travis_boost_version//\./_}"
-readonly boost_url="https://dl.bintray.com/boostorg/release/$travis_boost_version/source/$boost_fs.tar.gz"
-readonly boost_dir="$base_dir/$boost_fs"
+readonly script_name="$( basename -- "${BASH_SOURCE[0]}" )"
 
-address_model=32
-[ "$platform" = x64 ] && address_model=64
-readonly address_model
+dump() {
+    local msg
+    for msg; do
+        echo "$script_name: $msg"
+    done
+}
+
+set_paths() {
+    local boost_fs="boost_${travis_boost_version//\./_}"
+
+    readonly boost_archive="$boost_fs.tar.gz"
+    readonly boost_url="https://dl.bintray.com/boostorg/release/$travis_boost_version/source/$boost_archive"
+    readonly boost_dir="$base_dir/$boost_fs"
+}
+
+set_address_model() {
+    if [ "$platform" = x64 ]; then
+        readonly address_model=64
+    elif [ "$platform" = x86 ]; then
+        readonly address_model=32
+    else
+        dump "unsupported platform: $platform" >&2
+        exit 1
+    fi
+}
 
-configuration="${configuration,,}"
-readonly configuration
+set_configuration() {
+    configuration="${configuration,,}"
+    readonly configuration
+}
+
+set_parameters() {
+    set_paths
+    set_address_model
+    set_configuration
+}
 
 download() {
-    cd -- "$base_dir"
-    wget --quiet -- "$boost_url"
-    tar xzvf "$boost_fs.tar.gz" > /dev/null
+    wget --quiet -O "$boost_archive" -- "$boost_url"
+    tar xzvf "$boost_archive" > /dev/null
 }
 
 build() {
     cd -- "$boost_dir"
+
     ./bootstrap.sh
 
-    ./b2                                            \
-        "address-model=$address_model"              \
-        variant="$configuration"                    \
-        "--stagedir=stage/$platform/$configuration" \
+    ./b2                               \
+        "address-model=$address_model" \
+        variant="$configuration"       \
+        "--stagedir=$boost_dir/stage/$platform/$configuration" \
         "$@"
 }
 
 main() {
+    pushd -- "$base_dir"
+    trap 'popd' EXIT
+    set_parameters
     download
     build "$@"
 }
-- 
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