1#! /bin/sh
2
3# Convert one kind of changeset identifier to another.
4#
5# Usage: gcc-svn-ids -f from_kind -t to_kind id
6#
7# Where from_kind is one of:
8#   index   index into the changeset list used by the reghunt tools
9#   rev     is the Subversion revision name
10# and to_kind is one of:
11#   index   index into the changeset list used by the reghunt tools
12#   rev     is the Subversion revision name
13#   date    expanded UTC date string
14#   branch  the branch, or "trunk" for mainline
15#   author  the person who checked in the patch
16
17errmsg () {
18  echo $1 1>&2
19}
20
21usage () {
22  echo 'cvs_ids -f kind -t kind id' 1>&2
23  echo '   where from_kind is index or rev' 1>&2
24  echo '   and to_kind is index, rev, date, author, or branch' 1>&2
25  echo "error"
26  exit 1
27}
28
29if [ "x${REG_CHANGESET_LIST}" = "x" ]; then
30  errmsg "REG_CHANGESET_LIST is not defined"
31  echo "error"
32  exit 1
33fi
34
35if [ ! -f ${REG_CHANGESET_LIST} ]; then
36  errmsg "changeset list ${REG_CHANGESET_LIST} does not exist"
37  echo "error"
38  exit 1
39fi
40
41# Use a shorter name here.
42LIST=${REG_CHANGESET_LIST}
43
44while getopts "f:t:" ARG; do
45  case ${ARG} in
46  f) FROM_KIND="${OPTARG}";;
47  t) TO_KIND="${OPTARG}";;
48  h) usage;;
49  *) errmsg "unrecognized option: ${ARG}";
50     usage;;
51  esac
52done
53shift `expr ${OPTIND} - 1`
54
55if [ $# -eq 0 ]; then
56  errmsg "too few arguments, ID is missing"
57  usage
58fi
59if [ $# -gt 1 ]; then
60  errmsg "unexpected arguments: $*"
61  usage
62fi
63ID="$1"
64
65case ${FROM_KIND} in
66index)  LINE=`awk -F '|' -v id="${ID}" '{if ($1 == id) print }' < ${LIST}`;;
67rev)    LINE=`awk -F '|' -v id="${ID}" '{if ($2 == id) print }' < ${LIST}`;;
68*)      errmsg "unrecognized FROM kind: ${FROM_KIND}";
69        usage;;
70esac
71
72if [ "x${LINE}" = "x" ]; then
73  errmsg "no entry found for ${FROM_KIND} = ${ID}"
74  echo "error"
75  exit 1
76fi
77
78case ${TO_KIND} in
79index)  TO_ID="`echo ${LINE} | awk -F '|' '{ print $1 }'`";;
80rev)    TO_ID="`echo ${LINE} | awk -F '|' '{ print $2 }'`";;
81author) TO_ID="`echo ${LINE} | awk -F '|' '{ print $3 }'`";;
82date)   TO_ID="`echo ${LINE} | awk -F '|' '{ print $4 }'`";;
83branch) TO_ID="`echo ${LINE} | awk -F '|' '{ print $5 }'`";;
84*)      errmsg "unrecognized TO kind: ${TO_KIND}";
85        usage;;
86esac
87
88echo ${TO_ID}
89