118 lines
3.0 KiB
Go
118 lines
3.0 KiB
Go
package main
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import (
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"crypto/sha256"
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"fmt"
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"io"
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"io/fs"
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"log"
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"os"
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"strings"
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)
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// Searches the build toolchain output directory for new LineageOS builds.
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// Any new builds are moved into the public http server directory.
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// Returns true if new builds were moved
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func moveBuildArtifacts() bool {
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f, err := os.Open(buildOutDirectory)
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if err != nil {
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log.Printf("failed to open ROM directory: %v", err)
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return false
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}
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defer f.Close()
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files, err := f.ReadDir(0)
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if err != nil {
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log.Printf("failed to read files in directory: %v", err)
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return false
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}
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var newROMs bool
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for _, v := range files {
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if isLineageROM, _ := parseROMFileName(v); !isLineageROM { // skip files that aren't LineageOS ROMs
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continue
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}
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newROMs = true
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log.Printf("new build found - moving file %s", v.Name())
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romCache.Lock() // RW lock to prevent multiple concurrent goroutines moving the same file
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err := copyThenDeleteFile(fmt.Sprintf("%s/%s", buildOutDirectory, v.Name()), fmt.Sprintf("%s/%s", romDirectory, v.Name()))
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romCache.Unlock()
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if err != nil {
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log.Printf("failed to move file '%s' from out to rom directory: %v", v.Name(), err)
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continue
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}
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}
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return newROMs
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}
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// Returns a sha256 hash of a file located at the path provided
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func hashFile(filename string) (string, error) {
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f, err := os.Open(filename)
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if err != nil {
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return "", fmt.Errorf("failed to open file '%s': %v: ", filename, err)
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}
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defer f.Close()
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h := sha256.New()
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if _, err := io.Copy(h, f); err != nil {
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return "", fmt.Errorf("failed to copy data from file to hash function: %v", err)
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}
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return fmt.Sprintf("%x", h.Sum(nil)), nil
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}
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// false if a file is not a LineageOS ROM .zip file
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// no formal validation is performed - only file naming convention is checked
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// also returns a lineage ROM's filename sliced and delimited by -'s
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// Example filename: lineage-20.0-20230604-UNOFFICIAL-sunfish.zip
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func parseROMFileName(v fs.DirEntry) (bool, []string) {
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// skip directories, non .zip files and files that don't begin with lineage-
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if v.Type().IsDir() || !strings.HasSuffix(v.Name(), ".zip") || !strings.HasPrefix(v.Name(), "lineage-") {
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return false, nil
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}
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splitName := strings.Split(v.Name(), "-")
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// expect 5 dashes
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return len(splitName) == 5, splitName
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}
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// A custom "move file" function because in docker container the mounted folders are different overlay filesystems
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// Instead of os.Rename, we must copy and delete
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func copyThenDeleteFile(src, dst string) error {
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sourceFileStat, err := os.Stat(src)
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if err != nil {
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return err
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}
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if !sourceFileStat.Mode().IsRegular() {
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return fmt.Errorf("%s is not a regular file", src)
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}
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source, err := os.Open(src)
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if err != nil {
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return err
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}
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defer source.Close()
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destination, err := os.Create(dst)
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if err != nil {
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return err
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}
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defer destination.Close()
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_, err = io.Copy(destination, source)
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if err != nil {
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return fmt.Errorf("failed to copy file: %v", err)
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}
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err = os.Remove(src)
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if err != nil {
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return fmt.Errorf("failed to delete source file after copy: %v", err)
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}
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return nil
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}
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