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v/vlib/compiler/vhelp.v
2020-01-17 14:09:26 +01:00

93 lines
4.9 KiB
V

module compiler
pub const (
help_text = 'Usage: v [options/commands] [file.v | directory]
When V is run without any arguments, it is run in REPL mode.
When given a .v file, it will be compiled. The executable will have the
same name as the input .v file: `v foo.v` produces `./foo` on *nix systems,
`foo.exe` on Windows.
You can use -o to specify a different output executable\'s name.
When given a directory, all .v files contained in it will be compiled as
part of a single main module.
By default the executable will have the same name as the directory.
To compile all V files in current directory, run `v .`
Any file ending in _test.v, will be treated as a test.
It will be compiled and run, evaluating the assert statements in every
function named test_xxx.
You can put common options inside an environment variable named VFLAGS, so that
you don\'t have to repeat them.
You can set it like this: `export VFLAGS="-cc clang -debug"` on *nix,
`set VFLAGS=-cc msvc` on Windows.
V respects the TMPDIR environment variable, and will put .tmp.c files in TMPDIR/v/ .
If you have not set it, a suitable platform specific folder (like /tmp) will be used.
Options/commands:
-h, help Display this information.
-o <file> Write output to <file>.
-o <file>.c Produce C source without compiling it.
-o <file>.js Produce JavaScript source.
-prod Build an optimized executable.
-v, version Display compiler version and git hash of the compiler source.
-verbose Produce a verbose log about what the compiler is doing, where it seeks for files and so on.
-live Enable hot code reloading (required by functions marked with [live]).
-os <OS> Produce an executable for the selected OS.
OS can be linux, mac, windows, msvc.
Use msvc if you want to use the MSVC compiler on Windows.
-shared Build a shared library.
-stats Show additional stats when compiling/running tests. Try `v -stats test .`
-cache Turn on usage of the precompiled module cache.
It very significantly speeds up secondary compilations.
-obf Obfuscate the resulting binary.
-compress Compress the resulting binary.
- Shorthand for `v repl`.
Options for debugging/troubleshooting v programs:
-g Generate debugging information in the backtraces. Add *V* line numbers to the generated executable.
-cg Same as -g, but add *C* line numbers to the generated executable instead of *V* line numbers.
-keep_c Do NOT remove the generated .tmp.c files after compilation.
It is useful when using debuggers like gdb/visual studio, when given after `-g` / `-cg`.
-show_c_cmd Print the full C compilation command and how much time it took. See also `-verbose`.
-cc <ccompiler> Specify which C compiler you want to use as a C backend.
The C backend compiler should be able to handle C99 compatible C code.
Common C compilers are gcc, clang, tcc, icc, cl...
-cflags <flags> Pass additional C flags to the C backend compiler.
Example: -cflags `sdl2-config --cflags`
Commands:
up Update V. Run `v up` at least once per day, since V development is rapid and features/bugfixes are added constantly.
run <file.v> Build and execute the V program in file.v. You can add arguments for the V program *after* the file name.
build <module> Compile a module into an object file.
repl Run the V REPL. If V is running in a tty terminal, the REPL is interactive, otherwise it just reads from stdin.
symlink Useful on Unix systems. Symlinks the current V executable to /usr/local/bin/v, so that V is globally available.
test v Run all V test files, and compile all V examples.
test folder/ Run all V test files located in the folder and its subfolders. You can also pass individual _test.v files too.
fmt Run vfmt to format the source code. [wip]
doc Run vdoc over the source code and produce documentation.
translate Translates C to V. [wip, will be available in V 0.3]
create Create a new v project interactively. Answer the questions, and run it with `v run projectname`
V package management commands:
search keywords Search the https://vpm.vlang.io/ module repository for matching modules and shows their details.
install <module> Install a user module from https://vpm.vlang.io/.
update [module] Updates an already installed module, or ALL installed modules at once, when no module name is given.
remove [module] Removes an installed module, or ALL installed modules at once, when no module name is given.
'
)
/*
- To disable automatic formatting:
v -nofmt file.v
*/