Merge pull request #118 from oneton/1.0.2-branch-option

--branch option: download/build latest release in specific branch

Author: x2on

build-libssl.sh

@@ -36,6 +36,8 @@ echo_help()
   echo "     --archs=\"ARCH ARCH ...\"       Space-separated list of architectures to build"
   echo "                                     Options: x86_64 i386 arm64 armv7s armv7 tv_x86_64 tv_arm64"
   echo "                                     Note: The framework will contain include files from the architecture listed first"
+  echo "     --branch=BRANCH               Select OpenSSL branch to build. The script will determine and download the latest release for that branch"
+  echo "                                     Note: This script does not yet work with OpenSSL 1.1.0"
   echo "     --cleanup                     Clean up build directories (bin, include/openssl, lib, src) before starting build"
   echo "     --ec-nistp-64-gcc-128         Enable config option enable-ec_nistp_64_gcc_128 for 64 bit builds"
   echo " -h, --help                        Print help (this message)"
@@ -95,6 +97,7 @@ check_status()
 
 # Init optional command line vars
 ARCHS=""
+BRANCH=""
 CLEANUP=""
 CONFIG_ENABLE_EC_NISTP_64_GCC_128=""
 IOS_SDKVERSION=""
@@ -111,6 +114,10 @@ case $i in
     ARCHS="${i#*=}"
     shift
     ;;
+  --branch=*)
+    BRANCH="${i#*=}"
+    shift
+    ;;
   --cleanup)
     CLEANUP="true"
     ;;
@@ -149,16 +156,51 @@ case $i in
 esac
 done
 
-# Preprocess/validate OpenSSL version
-if [ -n "${VERSION}" ]; then
+# Don't mix version and branch
+if [[ -n "${VERSION}" && -n "${BRANCH}" ]]; then
+  echo "Either select a branch (the script will determine and build the latest version) or select a specific version, but not both."
+  exit 1
+
+# Specific version: Verify version number format. Expected: dot notation
+elif [[ -n "${VERSION}" && ! "${VERSION}" =~ ^[0-9]+\.[0-9]+\.[0-9]+[a-z]*$ ]]; then
+  echo "Unknown version number format. Examples: 1.0.2, 1.0.2h"
+  exit 1
+
+# Specific branch
+elif [ -n "${BRANCH}" ]; then
   # Verify version number format. Expected: dot notation
-  if [[ ! "${VERSION}" =~ ^[0-9]+\.[0-9]+\.[0-9]+[a-z]*$ ]]; then
-    echo "Unknown version number format. Examples: 1.0.2, 1.0.2h"
+  if [[ ! "${BRANCH}" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+    echo "Unknown branch version number format. Examples: 1.0.2, 1.0.1"
     exit 1
+
+  # Valid version number, determine latest version
+  else
+    echo "Checking latest version of ${BRANCH} branch on GitHub..."
+    # Request all git tags for the openssl repostory, get all tags that match the current branch version (with an optional alphabetic suffix), remove everything except the version number, sort the list and get the last item
+    GITHUB_VERSION=$(curl -Ls https://api.github.com/repos/openssl/openssl/git/refs/tags | grep -Eo "\"ref\": \"refs/tags/OpenSSL_${BRANCH//./_}[a-z]*\"" | sed -E 's|^.*"refs/tags/OpenSSL_([^"]+)".*$|\1|g' | sort | tail -1)
+
+    # Verify result
+    if [ -z "${GITHUB_VERSION}" ]; then
+      echo "Could not determine latest version, please check https://github.com/openssl/openssl/releases and use --version option"
+      exit 1
+    fi
+
+    VERSION="${GITHUB_VERSION//_/.}"
+
+    # Check whether download exists
+    # -I = HEAD, -L follow Location header, -f fail silently for 4xx errors and return status 22, -s silent
+    curl ${CURL_OPTIONS} -ILfs "https://github.com/openssl/openssl/archive/OpenSSL_${GITHUB_VERSION}.tar.gz" > /dev/null
+
+    # Check for success status
+    if [ $? -ne 0 ]; then
+      echo "Script determined latest version ${VERSION}, but the download archive does not seem to be available."
+      echo "Please check https://github.com/openssl/openssl/releases and use --version option"
+      exit 1
+    fi
   fi
 
-# Default OpenSSL version
-else
+# Script default
+elif [ -z "${VERSION}" ]; then
   VERSION="${DEFAULTVERSION}"
 fi
 
@@ -226,34 +268,43 @@ fi
 echo "  Script directory and build location: ${CURRENTPATH}"
 echo
 
-# -e  Abort script at first error, when a command exits with non-zero status (except in until or while loops, if-tests, list constructs)
-# -o pipefail  Causes a pipeline to return the exit status of the last command in the pipe that returned a non-zero return value
-set -eo pipefail
-
 # Download OpenSSL when not present
 OPENSSL_ARCHIVE_BASE_NAME=OpenSSL_${GITHUB_VERSION}
 OPENSSL_ARCHIVE_FILE_NAME=${OPENSSL_ARCHIVE_BASE_NAME}.tar.gz
 if [ ! -e ${OPENSSL_ARCHIVE_FILE_NAME} ]; then
   echo "Downloading ${OPENSSL_ARCHIVE_FILE_NAME}..."
-  curl ${CURL_OPTIONS} -L -O https://github.com/openssl/openssl/archive/${OPENSSL_ARCHIVE_FILE_NAME}
+  OPENSSL_ARCHIVE_URL="https://github.com/openssl/openssl/archive/${OPENSSL_ARCHIVE_FILE_NAME}"
+  # -L follow Location header, -f fail silently for 4xx errors and return status 22, -O Use server-specified filename for download
+  curl ${CURL_OPTIONS} -LfO "${OPENSSL_ARCHIVE_URL}"
+  
+  # Check for success status
+  if [ $? -ne 0 ]; then
+    echo "An error occured when trying to download OpenSSL ${VERSION} from ${OPENSSL_ARCHIVE_URL}."
+    echo "Please check cURL's error message and/or your network connection."
+    exit 1
+  fi
 else
   echo "Using ${OPENSSL_ARCHIVE_FILE_NAME}"
 fi
 
+# -e  Abort script at first error, when a command exits with non-zero status (except in until or while loops, if-tests, list constructs)
+# -o pipefail  Causes a pipeline to return the exit status of the last command in the pipe that returned a non-zero return value
+set -eo pipefail
+
 # Clean up target directories if requested and present
 if [ "${CLEANUP}" == "true" ]; then
-	if [ -d "${CURRENTPATH}/bin" ]; then
-	  rm -r "${CURRENTPATH}/bin"
-	fi
-	if [ -d "${CURRENTPATH}/include/openssl" ]; then
-	  rm -r "${CURRENTPATH}/include/openssl"
-	fi
-	if [ -d "${CURRENTPATH}/lib" ]; then
-	  rm -r "${CURRENTPATH}/lib"
-	fi
-	if [ -d "${CURRENTPATH}/src" ]; then
-	  rm -r "${CURRENTPATH}/src"
-	fi
+  if [ -d "${CURRENTPATH}/bin" ]; then
+    rm -r "${CURRENTPATH}/bin"
+  fi
+  if [ -d "${CURRENTPATH}/include/openssl" ]; then
+    rm -r "${CURRENTPATH}/include/openssl"
+  fi
+  if [ -d "${CURRENTPATH}/lib" ]; then
+    rm -r "${CURRENTPATH}/lib"
+  fi
+  if [ -d "${CURRENTPATH}/src" ]; then
+    rm -r "${CURRENTPATH}/src"
+  fi
 fi
 
 # (Re-)create target directories
@@ -353,7 +404,7 @@ do
   else
     (./Configure ${LOCAL_CONFIG_OPTIONS} > "${LOG}" 2>&1) & spinner
   fi
-  
+
   # Check for error status
   check_status $? "Configure"