v/compiler/modules.v

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// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module main
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import os
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const (
v_modules_path = os.home_dir() + '.vmodules'
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)
// add a module and its deps (module speficic dag method)
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pub fn(graph mut DepGraph) from_import_tables(import_tables map[string]FileImportTable) {
for _, fit in import_tables {
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mut deps := []string
for _, m in fit.imports {
deps << m
}
graph.add(fit.module_name, deps)
}
}
// get ordered imports (module speficic dag method)
pub fn(graph &DepGraph) imports() []string {
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mut mods := []string
for node in graph.nodes {
mods << node.name
}
return mods
}
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fn (v &V) module_path(mod string) string {
// submodule support
if mod.contains('.') {
return mod.replace('.', os.PathSeparator)
// return mod.replace('.', '/')
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}
return mod
}
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// 'strings' => 'VROOT/vlib/strings'
// 'installed_mod' => '~/.vmodules/installed_mod'
// 'local_mod' => '/path/to/current/dir/local_mod'
fn (v &V) find_module_path(mod string) ?string {
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mod_path := v.module_path(mod)
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// First check for local modules in the same directory
mut import_path := os.getwd() + '${os.PathSeparator}$mod_path'
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// Now search in vlib/
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if !os.dir_exists(import_path) {
import_path = '$v.lang_dir${os.PathSeparator}vlib${os.PathSeparator}$mod_path'
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}
//println('ip=$import_path')
// Finally try modules installed with vpm (~/.vmodules)
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if !os.dir_exists(import_path) {
import_path = '$v_modules_path${os.PathSeparator}$mod_path'
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if !os.dir_exists(import_path){
return error('module "$mod" not found')
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}
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}
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return import_path
}