[PATCH v2 0/1] deb-dl-dir: Use dpkg-deb --field in debsrc_download

[Uladzimir Bely <ubely@ilbers.de>]

Some clarification of the patch:
Debian `control` file inside .deb may (or may not) contain `Source: field`.

There are three possible cases:

1. `Source` field is missing in control file:
Package: foo
Version: 1.2.3

In this case ${source:Package} = 'foo', ${source:Version} = 1.2.3

2. `Source` field present in control file, without version:
Package: foo
Version: 1.2.3
Source: bar

In this case ${source:Package} = 'bar', ${source:Version} = 1.2.3

3. `Source` field present in control file, with version:
Package: foo
Versin: 1.2.3
Source: bar (4.5.6)

In this case ${source:Package} = 'bar', ${source:Version} = 4.5.6

So, `Source` field is virtual and the simplest way to request it - using
${source:Package} and ${source:Version} on "dpkg-deb --show --showformat".

While in bullseye this is currently broken, the patch simply emulates
the same using dpkg-deb --field. Initially, `Package` and `Version`
values are used (they should always be in control file), but later they
are overrided by values from `Source` field if it exists.

Changes since v1:
- Fixed commit message (should be BASE_REPO_FEATURES ?= "cache-deb-src",
but not ISAR_USE_CACHED_BASE_REPO)

Uladzimir Bely (1):
  deb-dl-dir: Use dpkg-deb --field in debsrc_download

 meta/classes/deb-dl-dir.bbclass | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

-- 
2.20.1