Dump: add output format tar and output to stdout (#10376)

* Dump: Use mholt/archive/v3 to support tar including many compressions

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: Allow dump output to stdout

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: Fixed bug present since #6677 where SessionConfig.Provider is never "file"

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: never pack RepoRootPath, LFS.ContentPath and LogRootPath when they are below AppDataPath

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: also dump LFS (fixes #10058)

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: never dump CustomPath if CustomPath is a subdir of or equal to AppDataPath (fixes #10365)

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Use log.Info instead of fmt.Fprintf

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* import ordering

* make fmt

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Matti R <matti@mdranta.net>

vendor/github.com/andybalholm/brotli/constants.go

@@ -0,0 +1,77 @@
+package brotli
+
+/* Copyright 2016 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+/* Specification: 7.3. Encoding of the context map */
+const contextMapMaxRle = 16
+
+/* Specification: 2. Compressed representation overview */
+const maxNumberOfBlockTypes = 256
+
+/* Specification: 3.3. Alphabet sizes: insert-and-copy length */
+const numLiteralSymbols = 256
+
+const numCommandSymbols = 704
+
+const numBlockLenSymbols = 26
+
+const maxContextMapSymbols = (maxNumberOfBlockTypes + contextMapMaxRle)
+
+const maxBlockTypeSymbols = (maxNumberOfBlockTypes + 2)
+
+/* Specification: 3.5. Complex prefix codes */
+const repeatPreviousCodeLength = 16
+
+const repeatZeroCodeLength = 17
+
+const codeLengthCodes = (repeatZeroCodeLength + 1)
+
+/* "code length of 8 is repeated" */
+const initialRepeatedCodeLength = 8
+
+/* "Large Window Brotli" */
+const largeMaxDistanceBits = 62
+
+const largeMinWbits = 10
+
+const largeMaxWbits = 30
+
+/* Specification: 4. Encoding of distances */
+const numDistanceShortCodes = 16
+
+const maxNpostfix = 3
+
+const maxNdirect = 120
+
+const maxDistanceBits = 24
+
+func distanceAlphabetSize(NPOSTFIX uint, NDIRECT uint, MAXNBITS uint) uint {
+	return numDistanceShortCodes + NDIRECT + uint(MAXNBITS<<(NPOSTFIX+1))
+}
+
+/* numDistanceSymbols == 1128 */
+const numDistanceSymbols = 1128
+
+const maxDistance = 0x3FFFFFC
+
+const maxAllowedDistance = 0x7FFFFFFC
+
+/* 7.1. Context modes and context ID lookup for literals */
+/* "context IDs for literals are in the range of 0..63" */
+const literalContextBits = 6
+
+/* 7.2. Context ID for distances */
+const distanceContextBits = 2
+
+/* 9.1. Format of the Stream Header */
+/* Number of slack bytes for window size. Don't confuse
+   with BROTLI_NUM_DISTANCE_SHORT_CODES. */
+const windowGap = 16
+
+func maxBackwardLimit(W uint) uint {
+	return (uint(1) << W) - windowGap
+}