gomod2nix/builder/symlink.go
2020-10-29 13:26:17 +01:00

94 lines
1.7 KiB
Go

package main
import (
"encoding/json"
"io/ioutil"
"os"
"path/filepath"
"sort"
)
type fetchInfo struct {
Type string `toml:"type"`
URL string `toml:"url"`
Rev string `toml:"rev"`
Sha256 string `toml:"sha256"`
}
type packageT struct {
SumVersion string `toml:"sumVersion"`
RelPath string `toml:"relPath,omitempty"`
VendorPath string `toml:"vendorPath,omitempty"`
Fetch *fetchInfo `toml:"fetch"`
}
func main() {
pkgs := make(map[string]*packageT)
sources := make(map[string]string)
b, err := ioutil.ReadFile(os.Getenv("sourcesPath"))
if err != nil {
panic(err)
}
err = json.Unmarshal(b, &sources)
if err != nil {
panic(err)
}
b, err = ioutil.ReadFile(os.Getenv("jsonPath"))
if err != nil {
panic(err)
}
err = json.Unmarshal(b, &pkgs)
if err != nil {
panic(err)
}
keys := make([]string, 0, len(pkgs))
for key := range pkgs {
keys = append(keys, key)
}
sort.Strings(keys)
// Iterate, in reverse order
for i := len(keys) - 1; i >= 0; i-- {
key := keys[i]
src := sources[key]
pkg := pkgs[key]
paths := []string{key}
if pkg.VendorPath != "" {
paths = append(paths, pkg.VendorPath)
}
for _, path := range paths {
vendorDir := filepath.Join("vendor", filepath.Dir(path))
os.MkdirAll(vendorDir, 0755)
if _, err := os.Stat(filepath.Join("vendor", path)); err == nil {
files, err := ioutil.ReadDir(src)
if err != nil {
panic(err)
}
for _, f := range files {
os.Symlink(filepath.Join(src, f.Name()), filepath.Join("vendor", path, f.Name()))
}
continue
}
// If the file doesn't already exist, just create a simple symlink
err := os.Symlink(src, filepath.Join("vendor", path))
if err != nil {
panic(err)
}
}
}
}