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tka: stable text representation of AUMHash

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This makes debugging easier, you can pass an AUMHash to a printf and get
a string that is easy to debug.

Also rearrange how directories/files work in the FS store: use the first
two characters of the string representation as the prefix directory, and
use the entire AUMHash string as the file name. This is again to aid
debugging: you can `ls` a directory and line up what prints out easily
with what you get from a printf in debug code.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
This commit is contained in:
David Crawshaw
2022-08-06 16:11:33 -07:00
committed by David Crawshaw
parent 40ec8617ac
commit 15b8665787
3 changed files with 53 additions and 28 deletions
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12
tka/tailchonk_test.go
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@ -146,13 +146,17 @@ func TestTailchonkFS_Commit(t *testing.T) {
t.Fatal(err)
}
if got, want := chonk.filename(aum.Hash()), "HJX3LPJJQVRFSQX4QONESBU4DUO5JPORA66ZUCFS6NHZWDZTP4"; got != want {
t.Errorf("aum filename = %q, want %q", got, want)
dir, base := chonk.aumDir(aum.Hash())
if got, want := dir, filepath.Join(chonk.base, "VU"); got != want {
t.Errorf("aum dir=%s, want %s", got, want)
}
if _, err := os.Stat(filepath.Join(chonk.base, "ad", "HJX3LPJJQVRFSQX4QONESBU4DUO5JPORA66ZUCFS6NHZWDZTP4")); err != nil {
if want := "VU5G7NN5FGCWEWKC7SBZUSIGTQOR3VF52ED33GQIWLZU7GYPGN7Q"; base != want {
t.Errorf("aum base=%s, want %s", base, want)
}
if _, err := os.Stat(filepath.Join(dir, base)); err != nil {
t.Errorf("stat of AUM file failed: %v", err)
}
if _, err := os.Stat(filepath.Join(chonk.base, "67", "226TIYPDKQWKFD5MXUI3GRVDSDFXRBABNINTFIT5ADMCLZ464U")); err != nil {
if _, err := os.Stat(filepath.Join(chonk.base, "M7", "M7LL2NDB4NKCZIUPVS6RDM2GUOIMW6EEAFVBWMVCPUANQJPHT3SQ")); err != nil {
t.Errorf("stat of AUM parent failed: %v", err)
}
}