dpkg-deb: Obsolete bzip2 and lzma compression methods

debian/changelog

@@ -6,6 +6,7 @@ dpkg (1.18.11) UNRELEASED; urgency=medium
     to be valid. Thanks to David Kalnischkies <david@kalnischkies.de>.
   * Add support to dpkg-scanpackages for scanning a single binary file.
     Thanks to Javier Serrano Polo <javier@jasp.net>. Closes: #833964
+  * Obsolete dpkg-deb bzip2 and lzma compression methods by emitting errors.
   * Perl modules:
     - Obsolete Source-Version substvar in Dpkg::Substvars by emitting errors.
   * Packaging:

doc/README.feature-removal-schedule

@@ -27,27 +27,6 @@ Why:
  leftovers are automatically cleaned up on database parsing. So there's no
  need anymore for this manual action.
 
-What: -Zlzma (dpkg-deb option value)
-Status: deprecated
-When: 1.17.x
-Warning: program
-Why:
- LZMA compression has some format deficiencies fixed by XZ, which is what
- upstream has replaced it with, as such there's no point in continuing to
- support compressing new .deb files with that format, although unpacking
- will be kept being supported to handle existing compressed files.
-
-What: -Zbzip2 (dpkg-deb option value)
-Status: deprecated
-When: 1.18.x
-Warning: program
-Why:
- bzip2 compression has been superseded by xz when it comes to size, and
- gzip is still faster, in Debian there's really not many packages using
- that compression, as such there's no point in continuing to support
- compressing new .deb files with that format, although unpacking
- will be kept being supported to handle existing compressed files.
-
 What: --control-path (dpkg-query option)
 Status: deprecated
 When: 1.18.x
@@ -172,3 +151,24 @@ Why:
  Should switch to use binary:Version or source:Version substvars.
  .
  The code got changed to emit errors.
+
+What: -Zlzma (dpkg-deb option value)
+Status: removed
+When: 1.18.11
+Warning: program
+Why:
+ LZMA compression has some format deficiencies fixed by XZ, which is what
+ upstream has replaced it with, as such there's no point in continuing to
+ support compressing new .deb files with that format, although unpacking
+ will be kept being supported to handle existing compressed files.
+
+What: -Zbzip2 (dpkg-deb option value)
+Status: removed
+When: 1.18.11
+Warning: program
+Why:
+ bzip2 compression has been superseded by xz when it comes to size, and
+ gzip is still faster, in Debian there's really not many packages using
+ that compression, as such there's no point in continuing to support
+ compressing new .deb files with that format, although unpacking
+ will be kept being supported to handle existing compressed files.

dpkg-deb/main.c

@@ -109,7 +109,7 @@ usage(const struct cmdinfo *cip, const char *value)
 "      --uniform-compression        Use the compression params on all members.\n"
 "  -z#                              Set the compression level when building.\n"
 "  -Z<type>                         Set the compression type used when building.\n"
-"                                     Allowed types: gzip, xz, bzip2, none.\n"
+"                                     Allowed types: gzip, xz, none.\n"
 "  -S<strategy>                     Set the compression strategy when building.\n"
 "                                     Allowed values: none; extreme (xz);\n"
 "                                     filtered, huffman, rle, fixed (gzip).\n"
@@ -213,9 +213,9 @@ set_compress_type(const struct cmdinfo *cip, const char *value)
   if (compress_params.type == COMPRESSOR_TYPE_UNKNOWN)
     badusage(_("unknown compression type '%s'!"), value);
   if (compress_params.type == COMPRESSOR_TYPE_LZMA)
-    warning(_("deprecated compression type '%s'; use xz instead"), value);
+    badusage(_("obsolete compression type '%s'; use xz instead"), value);
   if (compress_params.type == COMPRESSOR_TYPE_BZIP2)
-    warning(_("deprecated compression type '%s'; use xz or gzip instead"), value);
+    badusage(_("obsolete compression type '%s'; use xz or gzip instead"), value);
 }
 
 static const struct cmdinfo cmdinfos[]= {

man/dpkg-deb.man

@@ -230,10 +230,10 @@ The default for this field is “${Package}\\t${Version}\\n”.
 .TP
 .BI \-z compress-level
 Specify which compression level to use on the compressor backend, when
-building a package (default is 9 for gzip and bzip2, 6 for xz and lzma).
-The accepted values are 0-9 with: 0 being mapped to compressor none for
-gzip and 0 mapped to 1 for bzip2. Before dpkg 1.16.2 level 0 was
-equivalent to compressor none for all compressors.
+building a package (default is 9 for gzip, 6 for xz).
+The accepted values are 0-9 with: 0 being mapped to compressor none for gzip.
+Before dpkg 1.16.2 level 0 was equivalent to compressor none for all
+compressors.
 .TP
 .BI \-S compress-strategy
 Specify which compression strategy to use on the compressor backend, when
@@ -244,7 +244,6 @@ gzip (since dpkg 1.17.0) and \fBextreme\fP for xz.
 .BI \-Z compress-type
 Specify which compression type to use when building a package.
 Allowed values are \fBgzip\fP, \fBxz\fP (since dpkg 1.15.6),
-\fBbzip2\fP (deprecated), \fBlzma\fP (since dpkg 1.14.0; deprecated),
 and \fBnone\fP (default is \fBxz\fP).
 .TP
 .B \-\-uniform\-compression