A shepherd for your Appimages.
cleanup
Aly Raffauf
(Jun 18, 2026, 12:52 PM EDT)
4f0c2cd2
bf5b62b6
+8
-9
+7
-6
internal/appherder/appimage.go
+7
-6
internal/appherder/appimage.go
···
125
125
}
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126
}
127
127
128
+
// readerAt is the subset of io.ReaderAt used by filesystem detection helpers.
129
+
type readerAt interface {
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+
ReadAt([]byte, int64) (int, error)
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+
}
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+
128
133
// isSquashFS reports whether a SquashFS superblock begins at offset.
129
-
func isSquashFS(file interface {
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-
ReadAt([]byte, int64) (int, error)
131
-
}, offset int64) bool {
134
+
func isSquashFS(file readerAt, offset int64) bool {
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magic := make([]byte, 4)
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136
_, err := file.ReadAt(magic, offset)
134
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return err == nil && string(magic) == "hsqs"
···
136
139
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// scanForSquashFS searches for a SquashFS superblock in 4096-byte steps over
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// the next 64 MiB starting from offset. Returns the found position or false.
139
-
func scanForSquashFS(file interface {
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-
ReadAt([]byte, int64) (int, error)
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-
}, offset int64) (int64, bool) {
142
+
func scanForSquashFS(file readerAt, offset int64) (int64, bool) {
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const window = 64 * 1024 * 1024
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buf := make([]byte, 4096)
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for pos := offset; pos < offset+window; pos += 4096 {
+1
-3
internal/appherder/dwarfs.go
+1
-3
internal/appherder/dwarfs.go
···
56
56
}
57
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// isDwarFS reports whether the payload at offset starts with the DwarFS magic.
59
-
func isDwarFS(file interface {
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-
ReadAt([]byte, int64) (int, error)
61
-
}, offset int64) bool {
59
+
func isDwarFS(file readerAt, offset int64) bool {
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60
magic := make([]byte, 6)
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_, err := file.ReadAt(magic, offset)
64
62
return err == nil && string(magic) == "DWARFS"