debian/changelog.upstream.sh

   1 #!/bin/sh
   2 # Generate debian/changelog.upstream from debian/changelog and
   3 # the git revision log.  Inspired by Gerrit Pape’s
   4 # debian/changelog.upstream.sh, from the git-core Debian package.
   5
   6 set -e
   7
   8 # If argument matches /^Version: /, output remaining text.
   9 # Result is true if and only if argument matches.
  10 version_line() {
  11         local line result
  12         line=$1
  13         result=${line#Version: }
  14
  15         if test "$result" = "$line"
  16         then
  17                 return 1
  18         else
  19                 printf "%s\n" "$result"
  20                 return 0
  21         fi
  22 }
  23
  24 # If argument matches /^\* New.*snapshot.*commit /,
  25 # output remaining text.
  26 # Result is true if and only if argument matches.
  27 commit_id_line() {
  28         local line result
  29         line=$1
  30         result=${line#\* New*snapshot*commit }
  31
  32         if test "$result" = "$line"
  33         then
  34                 return 1
  35         else
  36                 printf "%s\n" "$result"
  37                 return 0
  38         fi
  39 }
  40
  41 # Read standard input, scanning for a changelog entry of the
  42 # form “New snapshot, taken from upstream commit <blah>.”
  43 # Output is <blah>.
  44 # Fails and writes a message to standard error if no such entry is
  45 # found before the next Version: line with a different upstream
  46 # version (or EOF).
  47 # $1 is the upstream version sought.
  48 read_commit_id() {
  49         local upstream_version line version cid
  50         upstream_version=$1
  51
  52         while read line
  53         do
  54                 if
  55                         version=$(version_line "$line") &&
  56                         test "${version%-*}" != "$upstream_version"
  57                 then
  58                         break
  59                 fi
  60
  61                 if cid=$(commit_id_line "$line")
  62                 then
  63                         printf "%s\n" "${cid%.}"
  64                         return 0
  65                 fi
  66         done
  67
  68         echo >&2 "No commit id for $upstream_version"
  69         return 1
  70 }
  71
  72 last=none
  73 last_cid=none
  74 # Add a list of all revisions up to $last to debian/changelog.upstream
  75 # and set last=$2.
  76 # $1 is a user-readable name for the commit $2
  77 add_version() {
  78         local new new_cid limiter
  79         new=$1
  80         new_cid=$2
  81
  82         if test "$last" = none
  83         then
  84                 : > debian/changelog.upstream
  85                 last=$new
  86                 last_cid=$new_cid
  87                 return 0
  88         fi
  89
  90         exec >> debian/changelog.upstream
  91         if test "$new" = none
  92         then
  93                 echo "Version $last:"
  94                 echo "Version $last:" | tr "[:print:]" -
  95                 limiter=
  96         elif test "$new" = "$last"
  97         then
  98                 return 0
  99         else
 100                 echo "Version $last; changes since $new:"
 101                 echo "Version $last; changes since $new:" | tr "[:print:]" -
 102                 limiter="$new_cid.."
 103         fi
 104         echo
 105         git rev-list --no-merges "$limiter$last_cid" |
 106         git diff-tree --date=iso --stat --format=medium --stdin
 107         test "$new" = none || echo
 108
 109         last=$new
 110         last_cid=$new_cid
 111 }
 112
 113 dpkg-parsechangelog --format rfc822 --all | {
 114 while read line
 115 do
 116         if version=$(version_line "$line")
 117         then
 118                 # strip Debian revision
 119                 upstream_version=${version%-*}
 120
 121                 if git rev-parse --verify -q "v$upstream_version" > /dev/null
 122                 then
 123                         # upstream release
 124                         add_version "$upstream_version" "v$upstream_version"
 125                 else
 126                         # snapshot
 127                         cid=$(read_commit_id "$upstream_version") || exit 1
 128                         add_version "$upstream_version" "$cid"
 129                 fi
 130         fi
 131 done
 132 add_version none none
 133 }