1 files changed, 93 insertions, 0 deletions
diff --git a/src/build.sh b/src/build.sh
new file mode 100644
index 0000000..ed9b0ca
--- /dev/null
+++ b/src/build.sh
@@ -0,0 +1,93 @@
+#!/bin/sh
+
+get_buildfiles () {
+    ${QUIET} || printf "${BLUE}Syncing sources..."
+
+    [ -d "$BUILDFILES_DIR" ] ||
+        mkdir -p $BUILDFILES_DIR
+
+    cd $BUILDFILES_DIR
+
+    {
+        git rev-parse --git-dir && 
+            git pull ||
+            git clone $BUILDFILES_GIT .
+        } > $(${VERBOSE}&&echo "/dev/stdout" || echo "/dev/null") 2>&1  && {
+        ${QUIET} || printf "${GREEN}${CHECKMARK}\n"
+    }
+}
+
+get_deps () {
+    for f in $BUILDFILES_DIR/repo/*/$1/*.xibuild; do 
+        sed -rn "s/^.*DEPS=\"(.*)\"/\1/p" $f
+    done
+}
+
+build_order () {
+    while [ "$#" != "0" ]; do 
+        name=$1
+        shift
+        for dep in $(get_deps $name); do
+            set -- $@ $dep
+            echo $name $dep
+        done
+    done | tsort | reverse_lines 
+}
+
+# get the revision hash of a given builddir
+#
+get_revision () {
+    cat $1/*.xibuild | sha512sum | cut -d' ' -f1
+}
+
+# return the installed revision of the given package
+#
+get_installed_revision () {
+    local infofile=${INSTALLED_DIR}/$1/info
+    [ -f $infofile ] && {
+        sed -rn "s/^REVISION=(.*)$/\1/p" $infofile
+    }
+}
+
+# test if the given package by name needs to be rebuilt
+#
+needs_build () {
+    name=$1
+    builddir=$(get_package_build $name)
+
+    [ "$(get_revision $builddir)" = "$(get_installed_revision $name)" ] 
+}
+
+
+get_package_build () {
+    local buildfile=$(find $BUILDFILES_DIR/repo -name "$1.xibuild" | head -1)
+    echo ${buildfile%/*}
+}
+
+build_package () {
+    local name=$(basename $1)
+    local builddir=$(get_package_build $1)
+
+    [ -d "$builddir" ] && {
+       xibuild -ci -r ${SYSROOT} $builddir 
+    } || { 
+        ${QUIET} || printf "${RED}Package $1 does not exist!\n"
+    }
+}
+
+build () {
+    $DO_SYNC && get_buildfiles
+    set -- $(build_order $@)
+
+    for p in $@; do 
+        needs_build $p && set -- $@ $p
+    done
+
+    printf "${LIGHT_BLUE}The following packages will be built: \n"
+    echo "\t${BLUE}$@\n"
+
+    prompt_question "${WHITE} Continue?" &&
+        for package in $@; do 
+            build_package $package || return 1
+        done
+}