From d13ed4ccddc2ccb94a877fbba7ad87fb0f8f6bc0 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Wed, 8 Jan 2020 04:33:12 +0300
Subject: Travis: verify executable file bitness

---
 .ci/.gitattributes |  1 +
 .ci/verify_arch.sh | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 .travis.yml        |  5 +++++
 3 files changed, 62 insertions(+)
 create mode 100644 .ci/.gitattributes
 create mode 100755 .ci/verify_arch.sh

diff --git a/.ci/.gitattributes b/.ci/.gitattributes
new file mode 100644
index 0000000..dfdb8b7
--- /dev/null
+++ b/.ci/.gitattributes
@@ -0,0 +1 @@
+*.sh text eol=lf
diff --git a/.ci/verify_arch.sh b/.ci/verify_arch.sh
new file mode 100755
index 0000000..aafc5e8
--- /dev/null
+++ b/.ci/verify_arch.sh
@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+set -o errexit -o nounset -o pipefail
+
+script_name="$( basename -- "${BASH_SOURCE[0]}" )"
+readonly script_name
+
+elf_file_class() {
+    local path
+    for path; do
+        od --address-radix=n --skip-bytes=4 --read-bytes=1 --format=x1 -- "$path"
+    done
+}
+
+arch_to_file_class() {
+    local arch
+    for arch; do
+        case "$arch" in
+            x86)
+                echo '01'
+                ;;
+            x64)
+                echo '02'
+                ;;
+            *)
+                echo "$script_name: unsupported architecture: $arch" >&2
+                return 1
+                ;;
+        esac
+    done
+}
+
+main() {
+    if [ "$#" -ne 2 ]; then
+        echo "usage: $script_name BIN_PATH ARCH" >&2
+        return 1
+    fi
+
+    local path="$1"
+    local arch="$2"
+
+    local expected
+    expected=" $( arch_to_file_class "$arch" )"
+    local actual
+    actual="$( elf_file_class "$path" )"
+
+    if [ "$expected" = "$actual" ]; then
+        echo "$script_name: file '$path' matches architecture '$arch'"
+    else
+        echo "$script_name: file '$path' DOES NOT match architecture '$arch'"
+        echo "$script_name: expected ELF file class '$expected', actual file class is '$actual'" >&2
+        return 1
+    fi
+}
+
+main "$@"
diff --git a/.travis.yml b/.travis.yml
index 250ce85..b7ce789 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,6 +22,7 @@ jobs:
           --configuration Release
           -- cmake/examples/simple
         - "$HOME/install/simple/bin/foo"
+        - ./.ci/verify_arch.sh "$HOME/install/simple/bin/foo" x64
 
         - >-
           ./cmake/build/build.py
@@ -30,6 +31,7 @@ jobs:
           -- cmake/examples/static
           -D "CMAKE_TOOLCHAIN_FILE=$TRAVIS_BUILD_DIR/cmake/toolchains/gcc-x86.cmake"
         - "$HOME/install/static/bin/foo"
+        - ./.ci/verify_arch.sh "$HOME/install/static/bin/foo" x86
 
         - >-
           ./cmake/build/build.py
@@ -37,6 +39,7 @@ jobs:
           --configuration Release
           -- cmake/examples/dynamic
         - LD_LIBRARY_PATH="$HOME/install/dynamic/lib" "$HOME/install/dynamic/bin/foo"
+        - ./.ci/verify_arch.sh "$HOME/install/dynamic/bin/foo" x64
 
     - name: Boost 1.58
       script:
@@ -57,6 +60,7 @@ jobs:
           -D "BOOST_LIBRARYDIR=$TRAVIS_BUILD_DIR/boost_1_58_0/stage/x86/Debug/lib"
           -D "CMAKE_TOOLCHAIN_FILE=$TRAVIS_BUILD_DIR/cmake/toolchains/gcc-x86.cmake"
         - "$HOME/install/boost_1_58_0/bin/foo"
+        - ./.ci/verify_arch.sh "$HOME/install/boost_1_58_0/bin/foo" x86
 
     - name: Boost 1.72
       script:
@@ -80,6 +84,7 @@ jobs:
         - >-
           LD_LIBRARY_PATH="$TRAVIS_BUILD_DIR/boost_1_72_0/stage/x64/Release/lib"
           "$HOME/install/boost_1_72_0/bin/foo"
+        - ./.ci/verify_arch.sh "$HOME/install/boost_1_72_0/bin/foo" x64
 
     - name: Boost 1.65
       script:
-- 
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