build_library/torcx_manifest.sh: list all component pkgs in sources_on_disk()

source_on_disk() so far relied on the 'sourcePackage' field, which contains the
primary dependency of a torcx packge (app-torcx/docker ->
app-emulation/docker). Now the 'metaPackage' field (app-torcx/docker) is used,
which lets us look at RDEPENDS and figure out all packages that are indirectly
installed when installing a torcx package. torcx_dependencies() does just that,
so move it's definition to torcx_manifest.sh.

Signed-off-by: Jeremi Piotrowski <jpiotrowski@microsoft.com>

build_library/torcx_manifest.sh

@@ -133,5 +133,18 @@ function torcx_manifest::default_version() {
 # sources_on_disk returns the list of source packages of all torcx images installed on disk
 function torcx_manifest::sources_on_disk() {
   local file="${1}"
-  jq -r ".value.packages[].versions[] | select(.locations[].path).sourcePackage" < "${file}"
+  local torcx_pkg=""
+  jq -r ".value.packages[].versions[] | select(.locations[].path).metaPackage" < "${file}" |
+  while read torcx_pkg; do
+    torcx_dependencies "${torcx_pkg}" | tr ' ' '\n'
+  done
 }
+
+# Print the first level of runtime dependencies for a torcx meta-package.
+function torcx_dependencies() (
+  pkg=${1:?}
+  ebuild=$(equery-${BOARD} w "${pkg}")
+  function inherit() { : ; }
+  . "${ebuild}"
+  echo ${RDEPEND}
+)

build_torcx_store

@@ -58,15 +58,6 @@ check_gsutil_opts
 
 TORCX_CAS_ROOT="${FLAGS_output_root}/pkgs/${BOARD}"
 
-# Print the first level of runtime dependencies for a torcx meta-package.
-function torcx_dependencies() (
-        pkg=${1:?}
-        ebuild=$(equery-${BOARD} w "${pkg}")
-        function inherit() { : ; }
-        . "${ebuild}"
-        echo ${RDEPEND}
-)
-
 # Build and install a package configured as part of a torcx image.
 function torcx_build() (
         tmproot=${1:?}