build.sh: Make build.sh branch-aware and fix tab->space

build.sh

@@ -189,14 +189,6 @@ set_make() {
     MAKE='make'
 }
 
-check_git_branch() {
-    BRANCH=`git symbolic-ref HEAD | sed -e 's,.*/\(.*\),\1,'`
-    if [ "$BRANCH" != "master" ] ; then
-        $ECHO "git branch is $BRANCH, not master"
-        exit_script 3
-    fi
-}
-
 check_installed_programs() {
     ensure_program_installed chmod
     ensure_program_installed uname
@@ -295,6 +287,17 @@ find_architecture() {
     esac
 }
 
+find_num_cores() {
+    $ECHO "Finding num cores..."
+    NUM_CORES=7ZZ
+    uname_s=`uname -s`
+    check_ret uname
+    case $uname_s in
+        CYGWIN_NT-5.2-WOW64 | *CYGWIN_NT* | *CYGWIN* | MINGW32*) NUM_CORES=$NUMBER_OF_PROCESSORS;;
+        *darwin* | *Darwin* | *linux* | *Linux*) NUM_CORES=$(getconf _NPROCESSORS_ONLN);;
+    esac
+}
+
 write_test_program() {
     #! Must be 'echo'
     echo "#include <stdio.h>" > $C_WORD.c
@@ -356,6 +359,7 @@ set_factor_image() {
 echo_build_info() {
     $ECHO OS=$OS
     $ECHO ARCH=$ARCH
+    $ECHO NUM_CORES=$NUM_CORES
     $ECHO WORD=$WORD
     $ECHO DEBUG=$DEBUG
     $ECHO FACTOR_BINARY=$FACTOR_BINARY
@@ -429,6 +433,7 @@ parse_build_info() {
 find_build_info() {
     find_os
     find_architecture
+    find_num_cores
     set_cc
     find_word_size
     set_factor_binary
@@ -536,7 +541,8 @@ make_clean() {
 }
 
 make_factor() {
-    invoke_make CC=$CC CXX=$CXX $MAKE_TARGET -j5
+    $ECHO "Building factor with $NUM_CORES cores"
+    invoke_make CC=$CC CXX=$CXX $MAKE_TARGET -j$NUM_CORES
 }
 
 make_clean_factor() {
@@ -544,6 +550,15 @@ make_clean_factor() {
     make_factor
 }
 
+current_git_branch() {
+    git rev-parse --abbrev-ref HEAD
+}
+
+checksum_url() {
+    branch=$(current_git_branch)
+    echo "http://downloads.factorcode.org/images/$branch/checksums.txt"
+}
+
 update_boot_images() {
     $ECHO "Deleting old images..."
     $DELETE checksums.txt* > /dev/null 2>&1
@@ -551,7 +566,7 @@ update_boot_images() {
     $DELETE $BOOT_IMAGE.{?,??} > /dev/null 2>&1
     $DELETE temp/staging.*.image > /dev/null 2>&1
     if [[ -f $BOOT_IMAGE ]] ; then
-        get_url http://downloads.factorcode.org/images/latest/checksums.txt
+        get_url $(checksum_url)
         factorcode_md5=`cat checksums.txt|grep $BOOT_IMAGE|cut -f2 -d' '`
         set_md5sum
         disk_md5=`$MD5SUM $BOOT_IMAGE|cut -f1 -d' '`
@@ -568,9 +583,14 @@ update_boot_images() {
     fi
 }
 
+boot_image_url() {
+    branch=$(current_git_branch)
+    echo "http://downloads.factorcode.org/images/$branch/$BOOT_IMAGE"
+}
+
 get_boot_image() {
     $ECHO "Downloading boot image $BOOT_IMAGE."
-    get_url http://downloads.factorcode.org/images/latest/$BOOT_IMAGE
+    get_url $(boot_image_url)
 }
 
 get_url() {
@@ -610,7 +630,6 @@ install() {
 
 update() {
     get_config_info
-    check_git_branch
     git_fetch_factorcode
     backup_factor
     make_clean_factor