Introduce a single SBOM document (#606)

* [wip] single sbom doc

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* fix tests

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* fix more tests

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* fix linting

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* update cli tests

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* remove scope in import path

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* swap SPDX tag-value formatter to single sbom document

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* bust CLI cache

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* update fixture to byte diff

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

* byte for byte

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

* bust the cache

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

* who needs cache

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

* add jar for testing

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

* no more bit flips

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

* update apk with the delta for image and directory cases

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

* restore cache workflow

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

Co-authored-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

test/integration/test-fixtures/image-pkg-coverage/Dockerfile

@@ -1,2 +1,4 @@
 FROM scratch
-COPY . .
+COPY pkgs/ .
+# we duplicate to show a package count difference between all-layers and squashed scopes
+COPY lib lib

test/integration/test-fixtures/image-pkg-coverage/lib/apk/db/installed

@@ -46,4 +46,4 @@ a:0:0:755
 Z:Q1dAdYK8M/INibRQF5B3Rw7cmNDDA=
 R:getent
 a:0:0:755
-Z:Q1eR2Dz/WylabgbWMTkd2+hGmEya4=
+Z:Q1eR2Dz/WylabgbWMTkd2+hGmEya4=

test/integration/test-fixtures/image-pkg-coverage/pkgs/lib/apk/db/installed

@@ -0,0 +1,49 @@
+C:Q1p78yvTLG094tHE1+dToJGbmYzQE=
+P:libc-utils
+V:0.7.2-r0
+A:x86_64
+S:1175
+I:4096
+T:Meta package to pull in correct libc
+U:http://alpinelinux.org
+L:BSD
+o:libc-dev
+m:Natanael Copa <ncopa@alpinelinux.org>
+t:1575749004
+c:97b1c2842faa3bfa30f5811ffbf16d5ff9f1a479
+D:musl-utils
+
+C:Q1bTtF5526tETKfL+lnigzIDvm+2o=
+P:musl-utils
+V:1.1.24-r2
+A:x86_64
+S:37944
+I:151552
+T:the musl c library (libc) implementation
+U:https://musl.libc.org/
+L:MIT BSD GPL2+
+o:musl
+m:Timo Teräs <timo.teras@iki.fi>
+t:1584790550
+c:4024cc3b29ad4c65544ad068b8f59172b5494306
+D:scanelf so:libc.musl-x86_64.so.1
+p:cmd:getconf cmd:getent cmd:iconv cmd:ldconfig cmd:ldd
+r:libiconv
+F:sbin
+R:ldconfig
+a:0:0:755
+Z:Q1Kja2+POZKxEkUOZqwSjC6kmaED4=
+F:usr
+F:usr/bin
+R:iconv
+a:0:0:755
+Z:Q1CVmFbdY+Hv6/jAHl1gec2Kbx1EY=
+R:ldd
+a:0:0:755
+Z:Q1yFAhGggmL7ERgbIA7KQxyTzf3ks=
+R:getconf
+a:0:0:755
+Z:Q1dAdYK8M/INibRQF5B3Rw7cmNDDA=
+R:getent
+a:0:0:755
+Z:Q1eR2Dz/WylabgbWMTkd2+hGmEya4=