pkg: write tar status

This serves as a status indicator while fetching large tarballs, and
preserves information otherwise stripped during unpacking. This is a
revision of the tarArtifact to avoid inconsistent state from previously
cured tarArtifact lacking their status files.

Signed-off-by: Ophestra <cat@gensokyo.uk>

1 files changed, 42 insertions, 9 deletions

diff --git a/pkg/tar_test.go b/pkg/tar_test.go
index 5462714f..28fec2d2 100644
--- a/pkg/tar_test.go
+++ b/pkg/tar_test.go
@@ -44,6 +44,24 @@ func TestTar(t *testing.T) {
 	}
 	wantExpandEncode := pkg.Encode(wantExpand.hash())
 
+	const (
+		wantStatus = `drwx------ checksum/
+drwx------ checksum/1TL00Qb8dcqayX7wTO8WNaraHvY6b-KCsctLDTrb64QBCmxj_-byK1HdIUwMaFEP/
+-r-------- checksum/1TL00Qb8dcqayX7wTO8WNaraHvY6b-KCsctLDTrb64QBCmxj_-byK1HdIUwMaFEP/check (2 bytes)
+drwx------ checksum/1TL00Qb8dcqayX7wTO8WNaraHvY6b-KCsctLDTrb64QBCmxj_-byK1HdIUwMaFEP/lib/
+Lrwxrwxrwx checksum/1TL00Qb8dcqayX7wTO8WNaraHvY6b-KCsctLDTrb64QBCmxj_-byK1HdIUwMaFEP/lib/libedac.so linkname /proc/nonexistent/libedac.so
+drwx------ checksum/1TL00Qb8dcqayX7wTO8WNaraHvY6b-KCsctLDTrb64QBCmxj_-byK1HdIUwMaFEP/lib/pkgconfig/
+drwx------ identifier/
+Lrwxrwxrwx identifier/HnySzeLQvSBZuTUcvfmLEX_OmH4yJWWH788NxuLuv7kVn8_uPM6Ks4rqFWM2NZJY linkname ../checksum/1TL00Qb8dcqayX7wTO8WNaraHvY6b-KCsctLDTrb64QBCmxj_-byK1HdIUwMaFEP
+Lrwxrwxrwx identifier/Zx5ZG9BAwegNT3zQwCySuI2ktCXxNgxirkGLFjW4FW06PtojYVaCdtEw8yuntPLa linkname ../checksum/1TL00Qb8dcqayX7wTO8WNaraHvY6b-KCsctLDTrb64QBCmxj_-byK1HdIUwMaFEP
+drwx------ work/
+`
+
+		wantStatusExpand = `drwx------ lib/
+Lrwxrwxrwx lib/libedac.so linkname /proc/nonexistent/libedac.so
+`
+	)
+
 	checkWithCache(t, []cacheTestCase{
 		{"http", 0, nil, func(t *testing.T, base *check.Absolute, c *pkg.Cache) {
 			checkTarHTTP(t, base, c, fstest.MapFS{
@@ -79,8 +97,12 @@ func TestTar(t *testing.T) {
 			"checksum/" + wantEncode + "/work": {Mode: fs.ModeDir | 0500},
 
 			"identifier": {Mode: fs.ModeDir | 0700},
-			"identifier/snWp53xxNdx6cV5KSJqzyVWzLlTsFd8udOisIu8Rgxly09mGcxufYCoQ5CQrHDyZ": {Mode: fs.ModeSymlink | 0777, Data: []byte("../checksum/" + wantEncode)},
-			"identifier/v9DUj2R4YK_3ae0m9VuUYI-HJysDDCENu1k10thxioycRzFH1Qejw5bBGukm4IdL": {Mode: fs.ModeSymlink | 0777, Data: []byte("../checksum/" + wantEncode)},
+			"identifier/82-Dwiovp_DGXPBmnmrTk4XtsduvTBBXxnJTBgyp6avsUhjcqmL9yKQLxkwJJM0x": {Mode: fs.ModeSymlink | 0777, Data: []byte("../checksum/" + wantEncode)},
+			"identifier/ld6DxwiP2Gj47Ue2L_pFv6NrOth8nkU5W1voMyivd2aVROrorGqPlpbyHUnU1AvI": {Mode: fs.ModeSymlink | 0777, Data: []byte("../checksum/" + wantEncode)},
+
+			"status": {Mode: fs.ModeDir | 0700},
+			"status/82-Dwiovp_DGXPBmnmrTk4XtsduvTBBXxnJTBgyp6avsUhjcqmL9yKQLxkwJJM0x": {Mode: 0400, Data: []byte(statusHeader + wantStatus)},
+			"status/ld6DxwiP2Gj47Ue2L_pFv6NrOth8nkU5W1voMyivd2aVROrorGqPlpbyHUnU1AvI": {Mode: 0400, Data: []byte(statusHeader + wantStatus)},
 
 			"substitute": {Mode: fs.ModeDir | 0700},
 
@@ -103,8 +125,12 @@ func TestTar(t *testing.T) {
 			"checksum/" + wantExpandEncode + "/libedac.so": {Mode: fs.ModeSymlink | 0777, Data: []byte("/proc/nonexistent/libedac.so")},
 
 			"identifier": {Mode: fs.ModeDir | 0700},
-			"identifier/1SuvgGltcsgqps9tWqjULG8RCdpx_6KVWXdsMd5xPKvdtysOxqpE-3bLu4j0WpGk": {Mode: fs.ModeSymlink | 0777, Data: []byte("../checksum/" + wantExpandEncode)},
-			"identifier/snWp53xxNdx6cV5KSJqzyVWzLlTsFd8udOisIu8Rgxly09mGcxufYCoQ5CQrHDyZ": {Mode: fs.ModeSymlink | 0777, Data: []byte("../checksum/" + wantExpandEncode)},
+			"identifier/82-Dwiovp_DGXPBmnmrTk4XtsduvTBBXxnJTBgyp6avsUhjcqmL9yKQLxkwJJM0x": {Mode: fs.ModeSymlink | 0777, Data: []byte("../checksum/" + wantExpandEncode)},
+			"identifier/fsMFOV4_LoYWbC8GNqL2zjbpzNzT80vPWbSw4L47caKVIta333WIW2TZXoSW8ntH": {Mode: fs.ModeSymlink | 0777, Data: []byte("../checksum/" + wantExpandEncode)},
+
+			"status": {Mode: fs.ModeDir | 0700},
+			"status/82-Dwiovp_DGXPBmnmrTk4XtsduvTBBXxnJTBgyp6avsUhjcqmL9yKQLxkwJJM0x": {Mode: 0400, Data: []byte(statusHeader + wantStatusExpand)},
+			"status/fsMFOV4_LoYWbC8GNqL2zjbpzNzT80vPWbSw4L47caKVIta333WIW2TZXoSW8ntH": {Mode: 0400, Data: []byte(statusHeader + wantStatusExpand)},
 
 			"substitute": {Mode: fs.ModeDir | 0700},
 
@@ -206,13 +232,13 @@ func checkTarHTTP(
 
 		{"directory", pkg.NewTar(&tarDir), ignorePathname, want, pkg.WNew, nil},
 
-		{"multiple entries", pkg.NewTar(&tarDirMulti), nil, nil, pkg.WNew, errors.New(
+		{"multiple entries", pkg.NewTar(&tarDirMulti), nil, nil, pkg.WNew, errors.Join(errors.New(
 			"input directory does not contain a single regular file",
-		)},
+		))},
 
-		{"bad type", pkg.NewTar(&tarDirType), nil, nil, pkg.WNew, errors.New(
+		{"bad type", pkg.NewTar(&tarDirType), nil, nil, pkg.WNew, errors.Join(errors.New(
 			"input directory does not contain a single regular file",
-		)},
+		))},
 
 		{"error passthrough", pkg.NewTar(&stubArtifact{
 			kind:   pkg.KindExec,
@@ -220,6 +246,13 @@ func checkTarHTTP(
 			cure: func(t *pkg.TContext) error {
 				return stub.UniqueError(0xcafe)
 			},
-		}), nil, nil, pkg.WNew, stub.UniqueError(0xcafe)},
+		}), nil, nil, pkg.WNew, errors.Join(stub.UniqueError(0xcafe))},
 	})
+
+	fault := base.Append("fault")
+	if err := os.RemoveAll(fault.String()); err != nil {
+		t.Fatal(err)
+	} else if err = os.Mkdir(fault.String(), 0); err != nil {
+		t.Fatal(err)
+	}
 }