A build description file uses Make syntax. It is usually called Makefile and typically takes the form
BUILDDIR := tzbuild # Path to the tzbuild directory include $(BUILDDIR)/config.mk # ... # Module declarations # ... include $(BUILDDIR)/rules.mk
The header sets the BUILDDIR variable to point to the root of tzbuild (required), and calls config.mk, which sets up several variables related to the build environment. Module declarations are then made, which describe the modules to be built and dependencies between them. Finally, rules.mk is called, which generates all build rules based on the module delcarations.
Modules are just a set of variables describing properties such as the location of source code, or depedent modules. Below is an example of a TypeScript module declaration
mymod_src := mymod/file1.ts mymod/file2.ts mymod_deps := someothermod TSLIBS += mymod
The last line here adds the name of the module mymod to the special variable TSLIBS. The system will later check this variable to find the complete list of modules to build. Here we have defined just two properties of mymod, the source files, and a module someothermode on which it depends. Given this name, tzbuild will check for variables of the appropriate name, for example mymod_src, etc. to find source files.
Dependencies result in different behavior depending on the module types (and in some cases build configuration), but the intention is that the user only needs to specify dependencies between modules, and tzbuild will calculate all include paths, linked libraries (in the case of C++) and other build related parameters. For TypeScript modules, the system ensures that declarations for dependent modules are available, and generates the appropriate commandlines to include them.
There should be no need to specify this information by hand, and it should be automatically applied to all build configurations. This is in stark contrast to 'project' based systems, where the user must often specify project dependencies, include paths to dependencies and library files to link against by hand, often for each build configuration.
Run make from the direectory containing your build description file. Variables can be set from the command line using VAR=value, and specific modules can be specified as targets.
make TS_REFCHECK=1 mymod
runs a refcheck (see below) build on the mymod modules.
TypeScript modules are added to the TSLIB variable. Each module can define the following variables:
<modname>_src(required) A list of source files to build
<modname>_deps(optional) A list of dependent modules
<modname>_nodecls(optional) Set to 1 if declarations should not be created for this module.
Global variables that control the building of TypeScript modules include:
TSLIBS(required) The list of TypeScript modules to build
TS_SRC_DIR(required for non-modular builds) The base directory of all source files. This is required when buildling TS files one-to-one into a destination directory so that the system can reconstruct the layout of source and destination files.
TS_REFCHECK(optional) Set to 1 to enable reference checking. This ensures that all reference statements in the code are in order. Note that references are not a requirement of tzbuild, since tzbuild can calculate all dependencies from the module declarations. Some IDEs require that references be inserted into the code, and this mode can be used to ensure that references are correct.
TS_MODULAR (1 by default)(optional) Set to 1 to enable a modular build. This uses the dependencies described in the module declarations to build each module into a .js file. All modules are expected to compile with no type errors, and a .d.ts declaration file is also generated (unless the _nodecls variable has been set).
If neither TS_MODULAR or TS_REFCHECK are set to 1, the build turns each .ts file into a .js file in the destination directory, and does NO type checking. This is intended for people migrating to typescript who wish to introduce a build and enable type checking later. Modular and refcheck builds inist that code is type-correct.
By default, modular builds are performed. Set TS_MODULAR or TS_REFCHECK appropriately in your Makefile to enable a different mode by default.
Below are some advanced / internal variables. All optional.
TS_OUTPUT_DIRControls the destination of build output. By default this is one of jslib, jslib-modular, jslib-refcheck based on the build mode, but it can be overriden.
_<mod>_out_jsOverrides the destination file for the given module. Used only when TS_MODULAR is set.
TARGET TARGETNAME BUILDHOST