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/dsnet/compress/internal/prefix/debug.go

@@ -0,0 +1,159 @@
+// Copyright 2015, Joe Tsai. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE.md file.
+
+// +build debug
+
+package prefix
+
+import (
+	"fmt"
+	"math"
+	"strings"
+)
+
+func max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+func lenBase2(n uint) int {
+	return int(math.Ceil(math.Log2(float64(n + 1))))
+}
+func padBase2(v, n uint, m int) string {
+	s := fmt.Sprintf("%b", 1<<n|v)[1:]
+	if pad := m - len(s); pad > 0 {
+		return strings.Repeat(" ", pad) + s
+	}
+	return s
+}
+
+func lenBase10(n int) int {
+	return int(math.Ceil(math.Log10(float64(n + 1))))
+}
+func padBase10(n, m int) string {
+	s := fmt.Sprintf("%d", n)
+	if pad := m - len(s); pad > 0 {
+		return strings.Repeat(" ", pad) + s
+	}
+	return s
+}
+
+func (rc RangeCodes) String() string {
+	var maxLen, maxBase int
+	for _, c := range rc {
+		maxLen = max(maxLen, int(c.Len))
+		maxBase = max(maxBase, int(c.Base))
+	}
+
+	var ss []string
+	ss = append(ss, "{")
+	for i, c := range rc {
+		base := padBase10(int(c.Base), lenBase10(maxBase))
+		if c.Len > 0 {
+			base += fmt.Sprintf("-%d", c.End()-1)
+		}
+		ss = append(ss, fmt.Sprintf("\t%s:  {len: %s, range: %s},",
+			padBase10(int(i), lenBase10(len(rc)-1)),
+			padBase10(int(c.Len), lenBase10(maxLen)),
+			base,
+		))
+	}
+	ss = append(ss, "}")
+	return strings.Join(ss, "\n")
+}
+
+func (pc PrefixCodes) String() string {
+	var maxSym, maxLen, maxCnt int
+	for _, c := range pc {
+		maxSym = max(maxSym, int(c.Sym))
+		maxLen = max(maxLen, int(c.Len))
+		maxCnt = max(maxCnt, int(c.Cnt))
+	}
+
+	var ss []string
+	ss = append(ss, "{")
+	for _, c := range pc {
+		var cntStr string
+		if maxCnt > 0 {
+			cnt := int(32*float32(c.Cnt)/float32(maxCnt) + 0.5)
+			cntStr = fmt.Sprintf("%s |%s",
+				padBase10(int(c.Cnt), lenBase10(maxCnt)),
+				strings.Repeat("#", cnt),
+			)
+		}
+		ss = append(ss, fmt.Sprintf("\t%s:  %s,  %s",
+			padBase10(int(c.Sym), lenBase10(maxSym)),
+			padBase2(uint(c.Val), uint(c.Len), maxLen),
+			cntStr,
+		))
+	}
+	ss = append(ss, "}")
+	return strings.Join(ss, "\n")
+}
+
+func (pd Decoder) String() string {
+	var ss []string
+	ss = append(ss, "{")
+	if len(pd.chunks) > 0 {
+		ss = append(ss, "\tchunks: {")
+		for i, c := range pd.chunks {
+			label := "sym"
+			if uint(c&countMask) > uint(pd.chunkBits) {
+				label = "idx"
+			}
+			ss = append(ss, fmt.Sprintf("\t\t%s:  {%s: %s, len: %s}",
+				padBase2(uint(i), uint(pd.chunkBits), int(pd.chunkBits)),
+				label, padBase10(int(c>>countBits), 3),
+				padBase10(int(c&countMask), 2),
+			))
+		}
+		ss = append(ss, "\t},")
+
+		for j, links := range pd.links {
+			ss = append(ss, fmt.Sprintf("\tlinks[%d]: {", j))
+			linkBits := lenBase2(uint(pd.linkMask))
+			for i, c := range links {
+				ss = append(ss, fmt.Sprintf("\t\t%s:  {sym: %s, len: %s},",
+					padBase2(uint(i), uint(linkBits), int(linkBits)),
+					padBase10(int(c>>countBits), 3),
+					padBase10(int(c&countMask), 2),
+				))
+			}
+			ss = append(ss, "\t},")
+		}
+	}
+	ss = append(ss, fmt.Sprintf("\tchunkMask: %b,", pd.chunkMask))
+	ss = append(ss, fmt.Sprintf("\tlinkMask:  %b,", pd.linkMask))
+	ss = append(ss, fmt.Sprintf("\tchunkBits: %d,", pd.chunkBits))
+	ss = append(ss, fmt.Sprintf("\tMinBits:   %d,", pd.MinBits))
+	ss = append(ss, fmt.Sprintf("\tNumSyms:   %d,", pd.NumSyms))
+	ss = append(ss, "}")
+	return strings.Join(ss, "\n")
+}
+
+func (pe Encoder) String() string {
+	var maxLen int
+	for _, c := range pe.chunks {
+		maxLen = max(maxLen, int(c&countMask))
+	}
+
+	var ss []string
+	ss = append(ss, "{")
+	if len(pe.chunks) > 0 {
+		ss = append(ss, "\tchunks: {")
+		for i, c := range pe.chunks {
+			ss = append(ss, fmt.Sprintf("\t\t%s:  %s,",
+				padBase10(i, 3),
+				padBase2(uint(c>>countBits), uint(c&countMask), maxLen),
+			))
+		}
+		ss = append(ss, "\t},")
+	}
+	ss = append(ss, fmt.Sprintf("\tchunkMask: %b,", pe.chunkMask))
+	ss = append(ss, fmt.Sprintf("\tNumSyms:   %d,", pe.NumSyms))
+	ss = append(ss, "}")
+	return strings.Join(ss, "\n")
+}