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This commit is contained in:
Jeffrey Paul 2024-05-13 09:42:59 -07:00
parent e4ca1a2ec2
commit 0c45e7b301
7 changed files with 83 additions and 35 deletions
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6
Makefile
View File

@ -4,7 +4,11 @@ test:
go test -v ./...
run: build
./dcfinfo
DEBUG=1 ./dcfinfo
build:
go env -w CGO_ENABLED="0"
cd cmd/dcfinfo && go build -o ../../dcfinfo
clean:
rm -f dcfinfo

6
README.md
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@ -14,6 +14,12 @@ The DCF specification is why your digital camera puts images and videos in
I wanted to copy images off my memory cards for processing and like
overengineering and reusable code.
# bugs
does not yet handle "dcf file groups" where multiple objects share the same
index number. if you need this, send me a link to a zip or tar of a memory
card that uses it and i'll see what i can do.
# author
sneak <[sneak@sneak.berlin](mailto:sneak@sneak.berlin)>

8
go.mod
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@ -2,10 +2,14 @@ module git.eeqj.de/sneak/dcf
go 1.22.1
require github.com/shirou/gopsutil v3.21.11+incompatible
require (
github.com/dustin/go-humanize v1.0.1
github.com/shirou/gopsutil v3.21.11+incompatible
)
require (
github.com/go-ole/go-ole v1.2.6 // indirect
github.com/go-ole/go-ole v1.3.0 // indirect
github.com/lmittmann/tint v1.0.4 // indirect
github.com/yusufpapurcu/wmi v1.2.4 // indirect
golang.org/x/sys v0.20.0 // indirect
)

8
go.sum
View File

@ -1,9 +1,15 @@
github.com/go-ole/go-ole v1.2.6 h1:/Fpf6oFPoeFik9ty7siob0G6Ke8QvQEuVcuChpwXzpY=
github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
github.com/go-ole/go-ole v1.3.0 h1:Dt6ye7+vXGIKZ7Xtk4s6/xVdGDQynvom7xCFEdWr6uE=
github.com/go-ole/go-ole v1.3.0/go.mod h1:5LS6F96DhAwUc7C+1HLexzMXY1xGRSryjyPPKW6zv78=
github.com/lmittmann/tint v1.0.4 h1:LeYihpJ9hyGvE0w+K2okPTGUdVLfng1+nDNVR4vWISc=
github.com/lmittmann/tint v1.0.4/go.mod h1:HIS3gSy7qNwGCj+5oRjAutErFBl4BzdQP6cJZ0NfMwE=
github.com/shirou/gopsutil v3.21.11+incompatible h1:+1+c1VGhc88SSonWP6foOcLhvnKlUeu/erjjvaPEYiI=
github.com/shirou/gopsutil v3.21.11+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=
github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

64
dcf.go → pkg/dcf/dcf.go
View File

@ -1,11 +1,14 @@
package dcf
import (
"crypto/sha256"
"fmt"
"io"
"os"
"path/filepath"
"strings"
"github.com/dustin/go-humanize"
"github.com/shirou/gopsutil/disk"
)
var imageExtensions = []string{".jpg", ".jpeg", ".png", ".gif", ".bmp", ".tiff", ".raw", ".arw"}
@ -15,16 +18,16 @@ var videoExtensions = []string{".mp4", ".mov", ".avi", ".mkv", ".wmv"}
// images and videos in the root of a mounted filesystem.
type DCFStore struct {
RootDirectory string
Images []Image
Videos []Video
Images []*Image
Videos []*Video
}
// DCFObject represents a file in a DCF store. It is embedded in Image and Video types.
type DCFObject {
type DCFObject struct {
DCFStoreRoot string
Path string
Size int64
Extension string
Path string
Size int64
Extension string
}
// Image represents an image file on a DCF store.
@ -37,7 +40,7 @@ type Video struct {
DCFObject
}
func (d *DCFObject) FullFilePath() {
func (d *DCFObject) FullFilePath() string {
return filepath.Join(d.DCFStoreRoot, d.Path)
}
@ -72,7 +75,12 @@ func (d *DCFStore) TotalSize() int64 {
}
func (d *DCFStore) String() string {
return fmt.Sprintf("DCFStore{RootDirectory: %s, Images: %d, Videos: %d, TotalSize: %s}", d.RootDirectory, d.ImagesCount(), d.VideosCount(), humanize.Bytes(uint64(d.TotalSize()))
return fmt.Sprintf("DCFStore{RootDirectory: %s, Images: %d, Videos: %d, TotalSize: %s}",
d.RootDirectory,
d.ImagesCount(),
d.VideosCount(),
humanize.Bytes(uint64(d.TotalSize())),
)
}
func (v *Video) String() string {
@ -85,10 +93,10 @@ func (i *Image) String() string {
// Hash() returns the SHA256 hash of the file as a hex string.
func (d *DCFObject) Hash() (string, error) {
return pathToSHA256(i.FullFilePath())
return pathToSHA256(d.FullFilePath())
}
function pathToSHA256 (path string) (string, error) {
func pathToSHA256(path string) (string, error) {
file, err := os.Open(path)
if err != nil {
return "", err
@ -101,12 +109,12 @@ function pathToSHA256 (path string) (string, error) {
return fmt.Sprintf("%x", hash.Sum(nil)), nil
}
// GetDCFStores returns a list of DCF stores found on the system in the root of any mounted filesystems.
// the integer argument is the number of DCF stores to return. If the argument is 0, all DCF stores are returned.
// It does not mount filesystems or search outside of filesystem root directories. It does, however,
// walk the filesystems to find images and videos and populate the returned DCFStores.
func GetDCFStores() (*[]DCFStore, error) {
dcfStorePaths, err := findDCFMountPoints()
func GetDCFStores(requestedCount int) (*[]DCFStore, error) {
dcfStorePaths, err := findDCFMountPoints(requestedCount)
if err != nil {
return nil, err
}
@ -114,8 +122,8 @@ func GetDCFStores() (*[]DCFStore, error) {
for _, dcfStorePath := range dcfStorePaths {
dcfStore := DCFStore{
RootDirectory: dcfStorePath,
Images: []Image{},
Videos: []Video{},
Images: make([]*Image, 0),
Videos: make([]*Video, 0),
}
err := filepath.Walk(dcfStorePath, func(path string, info os.FileInfo, err error) error {
@ -123,20 +131,20 @@ func GetDCFStores() (*[]DCFStore, error) {
return err
}
if !info.IsDir() && isImageFile(path) {
dcfStore.Images = append(dcfStore.Images, Image{
Path: strings.TrimPrefix(path, dcfStorePath+"/"),
Size: info.Size(),
Extension: filepath.Ext(path),
DCFStoreRoot: dcfStorePath,
})
image := Image{}
image.Path = strings.TrimPrefix(path, dcfStorePath+"/")
image.Size = info.Size()
image.Extension = filepath.Ext(path)
image.DCFStoreRoot = dcfStorePath
dcfStore.Images = append(dcfStore.Images, &image)
}
if !info.IsDir() && isVideoFile(path) {
dcfStore.Videos = append(dcfStore.Videos, Video{
Path: strings.TrimPrefix(path, dcfStorePath+"/")
Size: info.Size(),
Extension: filepath.Ext(path),
DCFStoreRoot: dcfStorePath,
})
video := Video{}
video.Path = strings.TrimPrefix(path, dcfStorePath+"/")
video.Size = info.Size()
video.Extension = filepath.Ext(path)
video.DCFStoreRoot = dcfStorePath
dcfStore.Videos = append(dcfStore.Videos, &video)
}
return nil
})

0
dcf_test.go → pkg/dcf/dcf_test.go
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26
helpers.go → pkg/dcf/helpers.go
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@ -1,8 +1,11 @@
package dcf
import (
"fmt"
"log/slog"
"os"
"path/filepath"
"runtime"
"github.com/shirou/gopsutil/disk"
)
@ -21,25 +24,42 @@ func findAllMountPoints() ([]string, error) {
return mountpoints, nil
}
func findDCFMountPoints() ([]string, error) {
func dump(x interface{}) {
_, file, line, _ := runtime.Caller(1)
slog.Debug(fmt.Sprintf("%s:%d %#v\n", file, line, x))
}
// findDCFMountPoints returns a list of strings of the paths of mountpoints that
// contain a DCIM or PRIVATE directory, which is how we detect DCF stores. Its
// only argument is an integer of how many mountpoints to return. If the
// argument is 0, all mountpoints are returned.
func findDCFMountPoints(requestedCount int) ([]string, error) {
filteredMountpoints := []string{}
var err error
var erro error
mountpoints, err := findAllMountPoints()
if err != nil {
if erro != nil {
return nil, err
}
for _, mountpoint := range mountpoints {
dcimPath := filepath.Join(mountpoint, "DCIM")
privatePath := filepath.Join(mountpoint, "PRIVATE")
privatePath = filepath.Join(mountpoint, "M4ROOT")
shouldKeep := false
if _, err := os.Stat(dcimPath); err == nil {
shouldKeep = true
slog.Debug(fmt.Sprintf("Found DCIM directory at %s\n", dcimPath))
}
if _, err := os.Stat(privatePath); err == nil {
shouldKeep = true
slog.Debug(fmt.Sprintf("Found M4ROOT directory at %s\n", privatePath))
}
if shouldKeep {
slog.Debug(fmt.Sprintf("Keeping mountpoint %s\n", mountpoint))
filteredMountpoints = append(filteredMountpoints, mountpoint)
if (requestedCount > 0) && (len(filteredMountpoints)+1 >= requestedCount) {
break
}
}
}
return filteredMountpoints, nil