output log file when lbrycrd build fails

reproducible_build.sh

@@ -30,6 +30,7 @@ CLEAN=false
 BUILD_DEPENDENCIES=true
 BUILD_LBRYCRD=true
 TIMEOUT=false
+THREE_MB=3145728
 
 while getopts :crldoth:w:d: FLAG; do
     case $FLAG in
@@ -151,14 +152,19 @@ function wait_and_echo() {
 # and wait until it completed
 function background() {
     $1 >> "$2" 2>&1 &
-    wait_and_echo $! "$3"
+    BACKGROUND_PID=$!
+    wait_and_echo $BACKGROUND_PID "$3"
 }
 
 function cleanup() {
     rv=$?
     # cat the log file if it exists
     if [ -f "$2" ]; then
-	cat "$2"
+	echo
+	echo "Output of log file $2"
+	echo
+	tail -c $THREE_MB "$1"
+	echo
     fi
     # delete the build directory
     rm -rf "$1"
@@ -166,6 +172,22 @@ function cleanup() {
     exit $rv
 }
 
+function cat_and_exit() {
+    rv=$?
+    # cat the log file if it exists
+    if [ -f "$1" ]; then
+	echo
+	echo "Output of log file $1"
+	echo
+	# log size is limited to 4MB on travis
+	# so hopefully the last 3MB is enough
+	# to debug whatever went wrong
+	tail -c $THREE_MB "$1"
+	echo
+    fi
+    exit $rv
+}
+
 function brew_if_not_installed() {
     if ! brew ls | grep $1 --quiet; then
 	brew install $1
@@ -298,20 +320,19 @@ function build_lbrycrd() {
     else
 	cd "${SOURCE_DIR}"
     fi
-    ./autogen.sh
+    ./autogen.sh > "${LBRYCRD_LOG}" 2>&1
     LDFLAGS="-L${OPENSSL_PREFIX}/lib/ -L${BDB_PREFIX}/lib/ -L${LIBEVENT_PREFIX}/lib/ -static-libstdc++"
     CPPFLAGS="-I${OPENSSL_PREFIX}/include -I${BDB_PREFIX}/include -I${LIBEVENT_PREFIX}/include/"
     if [ "${OS_NAME}" = "osx" ]; then
-	./configure --without-gui --enable-cxx --enable-static --disable-shared --with-pic \
+	OPTIONS="--enable-cxx --enable-static --disable-shared --with-pic"
+    else
+	OPTIONS=""
+    fi
+    ./configure --without-gui ${OPTIONS} \
 		--with-boost="${BOOST_PREFIX}" \
 		LDFLAGS="${LDFLAGS}" \
-		    CPPFLAGS="${CPPFLAGS}"
-    else
-	./configure --without-gui --with-boost="${BOOST_PREFIX}" \
-		    LDFLAGS="${LDFLAGS}" \
-		    CPPFLAGS="${CPPFLAGS}"
-    fi
-    make
+		CPPFLAGS="${CPPFLAGS}" >> "${LBRYCRD_LOG}" 2>&1
+    background make "${LBRYCRD_LOG}" "Waiting for lbrycrd to finish building"
     # tests don't work on OSX. Should definitely figure out why
     # that is but, for now, not letting that stop the rest
     # of the build
@@ -344,5 +365,7 @@ set -u
 if [ "${BUILD_LBRYCRD}" = true ]; then
     LBRYCRD_LOG="${LOG_DIR}/lbrycrd_build.log"
     echo "Building lbrycrd.  tail -f ${LBRYCRD_LOG} to see the details and monitor progress"
-    background build_lbrycrd "${LBRYCRD_LOG}" "Waiting for lbrycrd to finish building"
+    trap 'cat_and_exit "${LBRYCRD_LOG}"' INT TERM EXIT
+    build_lbrycrd
+    trap - INT TERM EXIT
 fi