v/vlib/compiler/vtools.v

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module compiler
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import (
os
filepath
)
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pub fn launch_tool(tname string) {
is_verbose := '-verbose' in os.args || '--verbose' in os.args
vexe := vexe_path()
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vroot := filepath.dir(vexe)
set_vroot_folder( vroot ) // needed by tools to find back v
tool_args := os.args[1..].join(' ')
tool_exe := os.realpath('$vroot/tools/$tname')
tool_source := os.realpath('$vroot/tools/${tname}.v')
tool_command := '"$tool_exe" $tool_args'
if is_verbose {
eprintln('launch_tool vexe : $vroot')
eprintln('launch_tool vroot : $vroot')
eprintln('launch_tool tool_args : $tool_args')
eprintln('launch_tool tool_command: $tool_command')
}
mut tool_should_be_recompiled := false
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if !os.exists(tool_exe) {
// fresh checkout
tool_should_be_recompiled = true
} else {
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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 is_verbose {
eprintln('launch_tool tool_should_be_recompiled: $tool_should_be_recompiled')
}
if tool_should_be_recompiled {
mut compilation_options := ''
if tname == 'vfmt' { compilation_options = '-d vfmt' }
compilation_command := '"$vexe" $compilation_options "$tool_source"'
if is_verbose {
eprintln('Compiling $tname with: "$compilation_command"')
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}
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)
}
}
if is_verbose {
eprintln('launch_tool running tool command: $tool_command ...')
}
exit( os.system(tool_command) )
}