Merge pull request #198 from vbatts/incorporate_subcommand

*: begin incorporating the "validate" subcommand

Author: vbatts

README.md

@@ -104,31 +104,31 @@ To use the command line tool, first [build it](#Building), then the following.
 This will also include the sha512 digest of the files.
 
 ```shell
-gomtree -c -K sha512digest -p . > /tmp/root.mtree
+gomtree validate -c -K sha512digest -p . > /tmp/root.mtree
 ```
 
 With a tar file:
 
 ```shell
-gomtree -c -K sha512digest -T sometarfile.tar > /tmp/tar.mtree
+gomtree validate -c -K sha512digest -T sometarfile.tar > /tmp/tar.mtree
 ```
 
 ### Validate a manifest
 
 ```shell
-gomtree -p . -f /tmp/root.mtree
+gomtree validate -p . -f /tmp/root.mtree
 ```
 
 With a tar file:
 
 ```shell
-gomtree -T sometarfile.tar -f /tmp/root.mtree
+gomtree validate -T sometarfile.tar -f /tmp/root.mtree
 ```
 
 ### See the supported keywords
 
 ```shell
-gomtree -list-keywords
+gomtree validate -list-keywords
 Available keywords:
  uname
  sha1

cmd/gomtree/cmd/validate.go

@@ -15,6 +15,7 @@ import (
 func NewValidateCommand() *cli.Command {
 	return &cli.Command{
 		Name:   "validate",
+		Usage:  "Create and validate a filesystem hierarchy (this is default tool behavior)",
 		Action: validateAction,
 		Flags: []cli.Flag{
 			// Flags common with mtree(8)

test/cli/0001a.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+set -e
+
+name=$(basename $0)
+root="$(dirname $(dirname $(dirname $0)))"
+gomtree=$(go run ${root}/test/realpath/main.go ${root}/gomtree)
+t=$(mktemp -d -t go-mtree.XXXXXX)
+
+echo "[${name}] Running in ${t}"
+# This test is for basic running check of manifest, and check against tar and file system
+#
+
+pushd ${root}
+
+git archive --format=tar -o "${t}/${name}.tar" HEAD^{tree}
+
+prev_umask=$(umask)
+umask 0 # this is so the tar command can set the mode's properly
+mkdir -p ${t}/extract
+tar -C ${t}/extract/ -xf "${t}/${name}.tar"
+umask ${prev_umask}
+
+# create manifest from tar
+${gomtree} validate -K sha256digest -c -T "${t}/${name}.tar" > "${t}/${name}.mtree"
+
+# check tar-manifest against the tar
+${gomtree} validate -f ${t}/${name}.mtree -T "${t}/${name}.tar"
+
+# check tar-manifest against the filesystem
+# git archive makes the uid/gid as 0, so don't check them for this test
+${gomtree} validate -k size,sha256digest,mode,type -f "${t}/${name}.mtree" -p ${t}/extract/
+
+# create a manifest from filesystem
+${gomtree} validate -K sha256digest -c -p "${t}/extract/" > "${t}/${name}.mtree"
+
+# check filesystem-manifest against the filesystem
+${gomtree} validate -f "${t}/${name}.mtree" -p "${t}/extract/"
+
+# check filesystem-manifest against the tar
+# git archive makes the uid/gid as 0, so don't check them for this test
+${gomtree} validate -k size,sha256digest,mode,type -f "${t}/${name}.mtree" -T "${t}/${name}.tar"
+
+popd
+rm -rf ${t}