website/libs/handlebars.dev.js
function template(templateSpec, env) {
			if (!env) {
				throw new Exception("No environment passed to template");
			}

			// Note: Using env.VM references rather than local var references throughout this section to allow
			// for external users to override these as psuedo-supported APIs.
			var invokePartialWrapper = function(partial, name, context, helpers, partials, data) {
				var result = env.VM.invokePartial.apply(this, arguments);
				if (result != null) { return result; }

				if (env.compile) {
					var options = { helpers: helpers, partials: partials, data: data };
					partials[name] = env.compile(partial, { data: data !== undefined }, env);
					return partials[name](context, options);
				} else {
					throw new Exception("The partial " + name + " could not be compiled when running in runtime-only mode");
				}
			};

			// Just add water
			var container = {
				escapeExpression: Utils.escapeExpression,
				invokePartial: invokePartialWrapper,
				programs: [],
				program: function(i, fn, data) {
					var programWrapper = this.programs[i];
					if(data) {
						programWrapper = program(i, fn, data);
					} else if (!programWrapper) {
						programWrapper = this.programs[i] = program(i, fn);
					}
					return programWrapper;
				},
				merge: function(param, common) {
					var ret = param || common;

					if (param && common && (param !== common)) {
						ret = {};
						Utils.extend(ret, common);
						Utils.extend(ret, param);
					}
					return ret;
				},
				programWithDepth: env.VM.programWithDepth,
				noop: env.VM.noop,
				compilerInfo: null
			};

			return function(context, options) {
				options = options || {};
				var namespace = options.partial ? options : env,
					helpers,
					partials;

				if (!options.partial) {
					helpers = options.helpers;
					partials = options.partials;
				}
				var result = templateSpec.call(
					container,
					namespace, context,
					helpers,
					partials,
					options.data);

				if (!options.partial) {
					env.VM.checkRevision(container.compilerInfo);
				}

				return result;
			};
		}
function template(templateSpec, env) {
			if (!env) {
				throw new Exception("No environment passed to template");
			}

			// Note: Using env.VM references rather than local var references throughout this section to allow
			// for external users to override these as psuedo-supported APIs.
			var invokePartialWrapper = function(partial, name, context, helpers, partials, data) {
				var result = env.VM.invokePartial.apply(this, arguments);
				if (result != null) { return result; }

				if (env.compile) {
					var options = { helpers: helpers, partials: partials, data: data };
					partials[name] = env.compile(partial, { data: data !== undefined }, env);
					return partials[name](context, options);
				} else {
					throw new Exception("The partial " + name + " could not be compiled when running in runtime-only mode");
				}
			};

			// Just add water
			var container = {
				escapeExpression: Utils.escapeExpression,
				invokePartial: invokePartialWrapper,
				programs: [],
				program: function(i, fn, data) {
					var programWrapper = this.programs[i];
					if(data) {
						programWrapper = program(i, fn, data);
					} else if (!programWrapper) {
						programWrapper = this.programs[i] = program(i, fn);
					}
					return programWrapper;
				},
				merge: function(param, common) {
					var ret = param || common;

					if (param && common && (param !== common)) {
						ret = {};
						Utils.extend(ret, common);
						Utils.extend(ret, param);
					}
					return ret;
				},
				programWithDepth: env.VM.programWithDepth,
				noop: env.VM.noop,
				compilerInfo: null
			};

			return function(context, options) {
				options = options || {};
				var namespace = options.partial ? options : env,
					helpers,
					partials;

				if (!options.partial) {
					helpers = options.helpers;
					partials = options.partials;
				}
				var result = templateSpec.call(
					container,
					namespace, context,
					helpers,
					partials,
					options.data);

				if (!options.partial) {
					env.VM.checkRevision(container.compilerInfo);
				}

				return result;
			};
		}
TODO: Remove this line and break up compilePartial