Changeset 191

Timestamp:

07/13/15 21:14:26 (9 years ago)

Author:

kdeugau

Message:

/trunk

Review, revise, and update automatic OS detection with much input from
Neal Gompa. Legacy Unbuntu verions have been refined, current LTS
releases and Debian releases have been added, and now that sanity has
prevailed we can get the base OS, OS release, and OS version all from
a handy file.

Note that debbuild diverges from rpmbuild in that it provides a
reasonable default for %{dist}, similar to usage found in RHEL and
Fedora packages (eg "el6" or "fc20"). rpmbuild relies on --define's
in the build environment call to set this. If specified with --define,
the command line argument will take precedence over the autodetection,
although the custom %{debver} and %{debdist} macros will remain as set
from the autodetection.

File:

• trunk/debbuild (modified) (5 diffs)

trunk/debbuild

@@ -142 +142 @@
 # /etc/debian-version and/or version of base-files package
 my %distmap = (
-        "3.1.9ubuntu7.1"        => "dapper",
-        "4ubuntu2"      => "feisty",
+# legacy Unbuntu
+        "3.1.9ubuntu"   => "dapper",
+        "6.06"          => "dapper",
+        "4ubuntu"       => "feisty",
+        "7.04"          => "fiesty",
+        "4.0.1ubuntu"   => "hardy",
+        "8.04"          => "hardy",
+# Note we do NOT support identification of "subrelease" versions (ie semimajor updates
+# to a given release).  If your dependencies are really that tight, and you can't rely
+# on the versions of the actual dependencies, you're already in over your head, and
+# should probably only ship a tarballed installer.
+# only supporting LTS releases
+# base-files version doesn't map to the Ubuntu version the way Debian versions do, thus the doubled entries
+#       Ubuntu 12.04.5 LTS (Precise Pangolin)
+        "6.5ubuntu"     => "precise",
+        "12.04"         => "precise",
+#       Ubuntu 14.04.2 LTS (Trusty Tahr)
+        "7.2ubuntu"     => "trusty",
+        "14.04"         => "trusty",
+# Debian releases
         "3.0"   => "woody",
         "3.1"   => "sarge",
         "4"     => "etch",
         "5"     => "lenny",
-        "6.0"   => "squeeze",
-        "7.0"   => "wheezy",
-        "8.0"   => "jessie",
-        "99"    => "sid");
+        "6"     => "squeeze",
+        "7"     => "wheezy",
+        "8"     => "jessie",
+        "9"     => "stretch",
+        "99"    => "sid",
+);
+
+# Map Ubuntu base-files versions to the nominal public versions
+
+my %ubnt_vermap = (
+        "6.5ubuntu6"    => "12.04",
+        "7.2ubuntu5"    => "14.04",
+);
+
 # Enh.  There doesn't seem to be any better way to do this...  :(
 {
@@ -157 +185 @@
 #  my $releasever = qx { cat /etc/debian_version };
 #  chomp $releasever;
+  my $basefiles;
   my $basever;
-
-  if ( ! -e '/usr/bin/dpkg-query' ) {
+  my $baseos;
+
+  # Funny thing how files like this have become useful...
+  # Check for /etc/os-release.  If that doesn't exist, try /etc/lsb-release.  If that doesn't exist,
+  # check for existence of dpkg-query, and either call it Debian Woody (if missing), or fall through
+  # to guessing based on the version of the base-files package.
+  if (-e '/etc/os-release') {
+    open OSREL, "</etc/os-release";
+    # Look for ID and VERSION_ID lines.
+    while (<OSREL>) {
+      $baseos = $1 if /^ID=(\w+)/;
+      $basever = $1 if /^VERSION_ID="?([\d.]+)/;
+    }
+    close OSREL;
+
+  } elsif (-e '/etc/lsb-release') {
+    open LSBREL, "</etc/lsb-release";
+    # Look for DISTRIB_ID and DISTRIB_RELEASE lines.
+    # We could also theoretically extract the dist codename, but since we have to hand-map
+    # it in so many other cases there's little point.
+    while (<LSBREL>) {
+      $baseos = $1 if /^DISTRIB_ID=(\w+)/;
+      $basever = $1 if /^DISTRIB_RELEASE=([\d.]+)/;
+    }
+    close LSBREL;
+
+  } elsif ( ! -e '/usr/bin/dpkg-query' ) {
     # call it woody, since sarge and newer have dpkg-query, and we don't much care about obsolete^n releases
     $basever = "3.0";
+    $baseos = 'debian';
+
   } else {
-
 # *eyeroll*  there *really* has to be a better way to go about this.  You
 # can't sanely build packages for multiple distro targets if you can't
@@ -171 +226 @@
 # releases would be...  exponentially more painful.
 
+    my $majver;
     # for the lazy copy-paster:  dpkg-query --showformat '${version}\n' -W base-files
     # avoid shellisms
@@ -177 +233 @@
       close BASEGETTER;
 
-      ($basever) = ($basever =~ /^(\d(?:\.\d)?)/);
-    }
-
+      if ($basever =~ /ubuntu/) {
+        # Ubuntu, at least until they upset their versioning scheme again
+        # note that we remap the basefiles version to the public release number, to match the
+        # behaviour for Debian, and to match the unofficial standard for RHEL/Centos etc and Fedora
+        ($basefiles,$basever) = ($basever =~ /^(([\d.]+)ubuntu)\d/);
+        $baseos = 'ubuntu';
+      } else {
+        # Debian, or more "pure" derivative
+        $baseos = 'debian';
+        ($basever,$majver) = ($basever =~ /^((\d+)(?:\.\d)?)/);
+        if ($majver > 3) {
+          $basever = $majver;
+        }
+      }
+    }
+
+    if (!$basever) {
+      # Your llama is on fire
+      $basever = '99';
+      print "Warning:  couldn't autodetect OS version, assuming sid/unstable\n";
+    }
   } # got dpkg-query?
 
+  # Set some legacy globals.
   $specglobals{"debdist"} = $distmap{$basever};
   $specglobals{"debver"} = $basever;   # this may have trouble with Ubuntu versions?
+
+  # Set the standard generic OS-class globals;
+  $baseos = lc($baseos);
+  $specglobals{"ubuntu"} = $basever if $baseos eq 'ubuntu';
+  $specglobals{"debian"} = $basever if $baseos eq 'debian';
+
+  # Default %{dist} to something marginally sane.  Note this should be overrideable by --define.
+  # This has been chosen to most closely follow the usage in RHEL/CentOS and Fedora, ie "el5" or "fc20".
+  $specglobals{"dist"} = $baseos.$basever;
 
 } # done trying to set debian dist/version
@@ -657 +741 @@
       my $output = expandmacros($1, 'gp');
       print "$output";
+      next LINE;
     }