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v/vlib/compiler/vtools.v

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module compiler
import os
pub fn launch_tool(tname string){
vexe := vexe_path()
vroot := os.dir(vexe)
mut oargs := os.args
oargs[0] = vexe // make it more explicit
tool_exe := os.realpath('$vroot/tools/$tname')
tool_source := os.realpath('$vroot/tools/${tname}.v')
//////////////////////////////////////////////////////
tool_args := oargs.join(' ')
tool_command := '$tool_exe $tool_args'
//println('Launching: "$tool_command" ...')
mut tool_should_be_recompiled := false
if !os.file_exists( tool_exe ) {
// fresh checkout
tool_should_be_recompiled = true
}else{
if os.file_last_mod_unix( tool_exe ) <= os.file_last_mod_unix( vexe ) {
// v was recompiled, maybe after v up ...
// rebuild the tool too just in case
tool_should_be_recompiled = true
}
if os.file_last_mod_unix( tool_exe ) <= os.file_last_mod_unix( tool_source ) {
// the user changed the source code of the tool
tool_should_be_recompiled = true
}
}
if tool_should_be_recompiled {
compilation_command := '$vexe $tool_source'
//println('Compiling $tname with: "$compilation_command"')
tool_compilation := os.exec(compilation_command) or { panic(err) }
if tool_compilation.exit_code != 0 {
panic('V tool "$tool_source" could not be compiled.')
}
}
exit( os.system(tool_command) )
}