hooks/artifacts are always run/resolved from an app unless at top of umbrella

Fix cover_spec options for ct

delete and prepend code path instead of replacing, fixes #770

add current_app attribute for setting before calling hooks

Fix #744: Allow _checkouts dep to override pkg dep not in registry

move state into app_info

Revert "Revert "only load packages when needed""

Revert "only load packages when needed"

only load packages when needed

Displays package caching actions

use ~ts for unicode output and reset encoding to latin1

as default seperator

Utf8 tree

This makes it obvious where packages are cached and when the cache is
being reused.

Messages are of the form:

===> Fetching recon ({pkg,<<"recon">>,<<"2.2.0">>})
===> Downloaded package, caching as
$HOME/.cache/rebar3/hex/default/packages/recon-2.2.0.tar

and

===> Fetching recon ({pkg,<<"recon">>,<<"2.2.0">>})
===> Version cached at
$HOME/.cache/rebar3/hex/default/packages/recon-2.2.0.tar is up
to date, reusing it

prints requested paths to stdout based on current profile

set parent on already fetched apps so tree works

Use raw bytestream when writing files

This patch forces write_file_if_contents_differ/2 to use raw bytes as
when writing files. This fixes an issue where UTF-8 characters are
processed and written back as ISO-8859-1 into the file, which makes it
impossible to use UTF-8 characters in .app.src files.

remove replacement of home dir with ~ in update output

symlink ct test dirs rather than copy