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v/vlib/compiler/vtools.v

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module compiler
import os
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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/${tname}.v')
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// ////////////////////////////////////////////////////
tool_args := oargs.join(' ')
tool_command := '"$tool_exe" $tool_args'
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// println('Launching: "$tool_command" ...')
mut tool_should_be_recompiled := false
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if !os.exists(tool_exe) {
// fresh checkout
tool_should_be_recompiled = true
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}
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
}
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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"'
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// 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\n' + tool_compilation.output)
}
}
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exit(os.system(tool_command))
}
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