Restore build-lua.sh for build-env

travis/build-lua.sh

@@ -0,0 +1,54 @@
+#!/bin/sh
+
+set -e
+
+LUA_ROOT="$HOME/lua53"
+LUA_URL="http://www.lua.org/ftp/lua-5.3.3.tar.gz"
+LUA_TAR=$(basename "$LUA_URL")
+LUA_DIR="$LUA_ROOT/${LUA_TAR%.tar.*}"
+LUA_SHA1="a0341bc3d1415b814cc738b2ec01ae56045d64ef"
+
+echo LUA_ROOT $LUA_ROOT
+echo LUA_TAR $LUA_TAR
+echo LUA_DIR $LUA_DIR
+
+sha1() {
+    python -c 'import hashlib, sys; print(hashlib.sha1(open(sys.argv[1],"rb").read()).hexdigest())' "$1"
+}
+
+download() {
+    echo "Downloading $LUA_URL"
+    wget -O "$LUA_ROOT/$LUA_TAR" "$LUA_URL"
+    tar xvf "$LUA_ROOT/$LUA_TAR"
+}
+
+build() {
+    cd "$LUA_DIR/src"
+    make generic
+}
+
+main() {
+    mkdir -p "$LUA_ROOT"
+    cd "$LUA_ROOT"
+    mkdir -p bin
+
+    if [ "$(sha1 "$LUA_ROOT/$LUA_TAR" 2>/dev/null)" != "$LUA_SHA1" ]; then
+        download
+        build
+    else
+        echo "Already downloaded"
+
+        if [ -x "$LUA_DIR/src/luac" ]; then
+            echo "Already built"
+        else
+            build
+        fi
+    fi
+
+    echo "Linking"
+    ln -sf "$LUA_DIR/src/lua" "$LUA_ROOT/bin/lua5.3"
+    ln -sf "$LUA_DIR/src/luac" "$LUA_ROOT/bin/luac5.3"
+    echo "Done"
+}
+
+main