all: initial commit

LICENSE.md

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+MIT License
+
+Copyright (c) 2017 GitHub, Inc. and Git LFS contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# verify-pack(1)
+
+`verify-pack(1)` parses v1 and v2 packfiles and prints the locations of the
+objects contained within them.
+
+## Usage
+
+`verify-pack(1)` accepts the filepath of a v1 or v2 packfile as its argument,
+and a line-delimited list of object names (in ASCII-encoded SHA-1 format) on
+stdin.
+
+## License
+
+MIT.

cmd/verify-pack/main.go

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+package main
+
+import (
+	"bufio"
+	"encoding/hex"
+	"fmt"
+	"os"
+
+	"github.com/git-lfs/git-lfs/git/odb/pack"
+	"github.com/pkg/errors"
+
+	"golang.org/x/exp/mmap"
+)
+
+func main() {
+	if len(os.Args) <= 1 {
+		die(usage())
+	}
+
+	f, err := mmap.Open(os.Args[1])
+	if err != nil {
+		die(errors.Wrap(err, "could not open index file").Error())
+	}
+
+	idx, err := pack.DecodeIndex(f)
+	if err != nil {
+		die(errors.Wrap(err, "could not decode index").Error())
+	}
+
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		name := scanner.Text()
+
+		oid, err := hex.DecodeString(name)
+		if err != nil {
+			die(errors.Wrapf(err, "could not decode name %q", name).Error())
+		}
+
+		e, err := idx.Entry(oid)
+		if err != nil {
+			die(errors.Wrapf(err, "could not find entry %q", name).Error())
+		}
+
+		fmt.Printf("%+v\n", e)
+	}
+
+	if err := scanner.Err(); err != nil {
+		die(err.Error())
+	}
+
+	if err := f.Close(); err != nil {
+		die(errors.Wrap(err, "could not close file").Error())
+	}
+}
+
+func die(msg string) {
+	fmt.Fprintln(os.Stderr, msg)
+	os.Exit(1)
+}
+
+func usage() string {
+	return fmt.Sprintf("usage: %s <pack>", os.Args[0])
+}