v/tools/vpm.v

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module main
import (
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net.http
os
json
filepath
)
const (
// url = 'http://localhost:8089'
url = 'https://vpm.best'
valid_vpm_commands = ['help', 'search', 'install', 'update', 'remove']
)
struct Mod {
id int
name string
url string
nr_downloads int
}
struct Vmod {
mut:
name string
version string
deps []string
}
fn main() {
ensure_vmodules_dir_exist()
change_to_vmodules_dir()
// This tool is intended to be launched by the v frontend,
// which provides the path to V inside os.getenv('VEXE')
args := os.args // args are: vpm SUBCOMMAND module names
if args.len < 2 {
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vpm_help([])
exit(5)
}
vpm_command := args[1]
module_names := args[2..]
// println('module names: ') println(module_names)
match vpm_command {
'help' {
vpm_help(module_names)
}
'search' {
vpm_search(module_names)
}
'install' {
vpm_install(module_names)
}
'update' {
vpm_update(module_names)
}
'remove' {
vpm_remove(module_names)
}
else {
println('Error: you tried to run "v $vpm_command"')
println('... but the v package management tool vpm only knows about these commands:')
for validcmd in valid_vpm_commands {
println(' v $validcmd')
}
exit(3)
}
}
}
fn vpm_search(keywords []string) {
if user_asks_for_help(keywords) {
println('Usage:')
println(' v search keyword1 [keyword2] [...]')
println(' ^^^^^^^^^^^^^^^^^ will search https://vpm.vlang.io/ for matching modules,')
println(' and will show details about them')
exit(0)
}
if keywords.len == 0 {
println(' v search requires *at least one* keyword')
exit(2)
}
modules := get_all_modules()
joined := keywords.join(', ')
mut index := 0
for mod in modules {
// TODO for some reason .filter results in substr error, so do it manually
for k in keywords {
if !mod.contains(k) {
continue
}
if index == 0 {
println('Search results for "$joined":\n')
}
index++
mut parts := mod.split('.')
// in case the author isn't present
if parts.len == 1 {
parts << parts[0]
parts[0] = ''
}
println('${index}. ${parts[1]} by ${parts[0]} [$mod]')
break
}
}
println('\nUse "v install author.module_name" to install the module')
if index == 0 {
println('No module(s) found for "$joined"')
}
}
fn vpm_install(module_names []string) {
if user_asks_for_help(module_names) {
println('Usage:')
println(' v install module [module] [module] [...]')
println(' ^^^^^^^^^^^^^ will install the modules you specified')
exit(0)
}
if module_names.len == 0 {
println(' v install requires *at least one* module name')
exit(2)
}
mut errors := 0
for n in module_names {
name := n.trim_space()
modurl := url + '/jsmod/$name'
r := http.get(modurl) or {
panic(err)
}
if r.status_code == 404 {
println('Skipping module "$name", since $url reported that "$name" does not exist.')
errors++
continue
}
if r.status_code != 200 {
println('Skipping module "$name", since $url responded with $r.status_code http status code. Please try again later.')
errors++
continue
}
s := r.text
mod := json.decode(Mod,s) or {
errors++
println('Skipping module "$name", since its information is not in json format.')
continue
}
if ('' == mod.url || '' == mod.name) {
errors++
// a possible 404 error, which means a missing module?
println('Skipping module "$name", since it is missing name or url information.')
continue
}
final_module_path := os.realpath(filepath.join(get_vmodules_dir_path(),mod.name.replace('.', os.path_separator)))
if os.exists(final_module_path) {
vpm_update([name])
continue
}
println('Installing module "$name" from $mod.url to $final_module_path ...')
os.exec('git clone --depth=1 "$mod.url" "$final_module_path"') or {
errors++
println('Could not install module "$name" to "$final_module_path" .')
println('Error details: $err')
continue
}
resolve_dependencies(name, final_module_path, module_names)
}
if errors > 0 {
exit(1)
}
}
fn vpm_update(m []string) {
mut module_names := m
if user_asks_for_help(module_names) {
println('Usage: ')
println(' a) v update module [module] [module] [...]')
println(' ^^^^^^^^^^^^ will update the listed modules to their latest versions')
println(' b) v update')
println(' ^^^^^^^^^^^^ will update ALL installed modules to their latest versions')
exit(0)
}
if module_names.len == 0 {
module_names = get_installed_modules()
}
mut errors := 0
for name in module_names {
final_module_path := os.realpath(filepath.join(get_vmodules_dir_path(),name.replace('.', os.path_separator)))
if !os.exists(final_module_path) {
println('No module with name "$name" exists at $final_module_path')
continue
}
os.chdir(final_module_path)
println('Updating module "$name"...')
os.exec('git pull --depth=1') or {
errors++
println('Could not update module "$name".')
println('Error details: $err')
continue
}
resolve_dependencies(name, final_module_path, module_names)
}
if errors > 0 {
exit(1)
}
}
fn vpm_remove(module_names []string) {
if user_asks_for_help(module_names) {
println('Usage: ')
println(' a) v remove module [module] [module] [...]')
println(' ^^^^^^^^^^^^ will remove the listed modules')
println(' b) v remove')
println(' ^^^^^^^^^^^^ will remove ALL installed modules')
exit(0)
}
if module_names.len == 0 {
println(' v update requires *at least one* module name')
exit(2)
}
for name in module_names {
final_module_path := os.realpath(filepath.join(get_vmodules_dir_path(),name.replace('.', os.path_separator)))
if !os.exists(final_module_path) {
println('No module with name "$name" exists at $final_module_path')
continue
}
println('Removing module "$name"...')
os.rmdir_recursive(final_module_path)
//delete author directory if it is empty
author := name.split('.')[0]
author_dir := os.realpath(filepath.join(get_vmodules_dir_path(), author))
if os.is_dir_empty(author_dir) {
os.rmdir(author_dir)
}
}
}
fn get_vmodules_dir_path() string {
return os.home_dir() + '.vmodules'
}
fn ensure_vmodules_dir_exist() {
home_vmodules := get_vmodules_dir_path()
if !os.is_dir(home_vmodules) {
println('Creating $home_vmodules/ ...')
os.mkdir(home_vmodules) or {
panic(err)
}
}
}
fn change_to_vmodules_dir() {
os.chdir(get_vmodules_dir_path())
}
fn user_asks_for_help(module_names []string) bool {
return ('-h' in module_names) || ('--help' in module_names) || ('help' in module_names)
}
fn vpm_help(module_names []string) {
println('Usage:')
println(' a) v install module [module] [module] [...]')
println(' b) v update [module] [...]')
println(' c) v remove [module] [...]')
println(' d) v search keyword1 [keyword2] [...]')
println('')
println(' You can also pass -h or --help after each vpm command from the above, to see more details about it.')
}
fn get_installed_modules() []string {
dirs := os.ls(get_vmodules_dir_path()) or {
return []
}
mut modules := []string
for dir in dirs {
if dir in ['cache', 'vlib'] || !os.is_dir(dir) {
continue
}
author := dir
mods := os.ls('${filepath.join(get_vmodules_dir_path(), dir)}') or {
continue
}
for m in mods {
modules << '${author}.$m'
}
}
return modules
}
fn get_all_modules() []string {
r := http.get(url) or {
panic(err)
}
if r.status_code != 200 {
println('Failed to search vpm.best. Status code: $r.status_code')
exit(1)
}
s := r.text
mut read_len := 0
mut modules := []string
for read_len < s.len {
mut start_token := '<a href="/mod'
end_token := '</a>'
// get the start index of the module entry
mut start_index := s.index_after(start_token, read_len)
if start_index == -1 {
break
}
// get the index of the end of anchor (a) opening tag
// we use the previous start_index to make sure we are getting a module and not just a random 'a' tag
start_token = '">'
start_index = s.index_after(start_token, start_index) + start_token.len
// get the index of the end of module entry
end_index := s.index_after(end_token, start_index)
if end_index == -1 {
break
}
modules << s[start_index..end_index]
read_len = end_index
if read_len >= s.len {
break
}
}
return modules
}
fn resolve_dependencies(name, module_path string, module_names []string) {
vmod_path := filepath.join(module_path,'v.mod')
if !os.exists(vmod_path) {
return
}
data := os.read_file(vmod_path) or {
return
}
vmod := parse_vmod(data)
mut deps := []string
// filter out dependencies that were already specified by the user
for d in vmod.deps {
if !(d in module_names) {
deps << d
}
}
if deps.len > 0 {
println('Resolving ${deps.len} dependencies for module "$name"...')
vpm_install(deps)
}
}
fn parse_vmod(data string) Vmod {
keys := ['name', 'version', 'deps']
mut m := {
'name': '',
'version': '',
'deps': ''
}
for key in keys {
mut key_index := data.index('$key:') or {
continue
}
key_index += key.len + 1
m[key] = data[key_index..data.index_after('\n', key_index)].trim_space().replace("'", '').replace('[', '').replace(']', '')
}
mut vmod := Vmod{}
vmod.name = m['name']
vmod.version = m['version']
if m['deps'].len > 0 {
vmod.deps = m['deps'].split(',')
}
return vmod
}