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// Copyright Nicolas Paul (2023)
//
// * Nicolas Paul
//
// This software is a computer program whose purpose is to allow the hosting
// and sharing of Go modules using a personal domain.
//
// This software is governed by the CeCILL license under French law and
// abiding by the rules of distribution of free software. You can use,
// modify and/ or redistribute the software under the terms of the CeCILL
// license as circulated by CEA, CNRS and INRIA at the following URL
// "http://www.cecill.info".
//
// As a counterpart to the access to the source code and rights to copy,
// modify and redistribute granted by the license, users are provided only
// with a limited warranty and the software's author, the holder of the
// economic rights, and the successive licensors have only limited
// liability.
//
// In this respect, the user's attention is drawn to the risks associated
// with loading, using, modifying and/or developing or reproducing the
// software by the user in light of its specific status of free software,
// that may mean that it is complicated to manipulate, and that also
// therefore means that it is reserved for developers and experienced
// professionals having in-depth computer knowledge. Users are therefore
// encouraged to load and test the software's suitability as regards their
// requirements in conditions enabling the security of their systems and/or
// data to be ensured and, more generally, to use and operate it in the
// same conditions as regards security.
//
// The fact that you are presently reading this means that you have had
// knowledge of the CeCILL license and that you accept its terms.
// Entry-point of the CLI program.
// Package main implements the SVGU utility.
package main // import "go.nc0.fr/svgu"
import (
"flag"
"log"
"os"
"path/filepath"
"sync"
)
var (
cfg = flag.String("c", "DOMAINS.star", "the configuration file to use.")
out = flag.String("o", "dst", "output directory")
verbose = flag.Bool("v", false, "prints additional information logs")
)
func main() {
log.SetFlags(0)
log.SetPrefix("svgu: ")
flag.Parse()
// Check if the configuration file exists.
if *verbose {
log.Printf("checking if configuration file %q exists", *cfg)
}
if cfg, err := filepath.Abs(*cfg); err != nil {
log.Fatalf("could not get absolute path of %s: %v", cfg, err)
}
if cfgfd, err := os.Stat(*cfg); os.IsNotExist(err) || cfgfd.IsDir() {
log.Fatalf("configuration file %q does not exist", *cfg)
} else if err != nil {
log.Fatalf("could not stat %q: %v", *cfg, err)
}
// Check if the output directory exists.
if *verbose {
log.Printf("checking if output directory %q exists", *out)
}
if out, err := filepath.Abs(*out); err != nil {
log.Fatalf("could not get absolute path of %s: %v", out, err)
}
if outfd, err := os.Stat(*out); outfd != nil && outfd.IsDir() {
log.Fatalf("output directory %q already exists", *out)
} else if err != nil && !os.IsNotExist(err) {
log.Fatalf("could not stat %q: %v", *out, err)
}
// Execute the configuration file and get the registered modules.
if *verbose {
log.Printf("executing configuration file %q", *cfg)
}
idx, err := ExecConfig(*cfg)
if err != nil {
log.Fatalf("could not execute configuration file %q: %v", *cfg, err)
}
// Create the output directory.
if *verbose {
log.Printf("creating output directory %q", *out)
}
if err := os.MkdirAll(*out, 0755); err != nil {
log.Fatalf("could not create output directory %q: %v", *out, err)
}
// Generate the index file.
if *verbose {
log.Printf("generating index file")
}
if err := idx.GenerateFile(*out); err != nil {
log.Fatalf("could not generate index file: %v", err)
}
// Generate the modules.
if *verbose {
log.Printf("generating modules")
}
var wg sync.WaitGroup
var mu sync.Mutex
for _, mod := range idx.Modules {
wg.Add(1)
go func(m *Module) {
defer wg.Done()
defer mu.Unlock()
mu.Lock()
if err := m.GenerateFile(*out, idx.Domain); err != nil {
log.Fatalf("could not generate module %q: %v", m.Path, err)
}
}(mod)
}
wg.Wait()
log.Println("done")
}
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