usr/src/tools/scripts/which_scm.sh

   1 #!/usr/bin/ksh -p
   2 #
   3 # CDDL HEADER START
   4 #
   5 # The contents of this file are subject to the terms of the
   6 # Common Development and Distribution License (the "License").
   7 # You may not use this file except in compliance with the License.
   8 #
   9 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10 # or http://www.opensolaris.org/os/licensing.
  11 # See the License for the specific language governing permissions
  12 # and limitations under the License.
  13 #
  14 # When distributing Covered Code, include this CDDL HEADER in each
  15 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16 # If applicable, add the following below this CDDL HEADER, with the
  17 # fields enclosed by brackets "[]" replaced with your own identifying
  18 # information: Portions Copyright [yyyy] [name of copyright owner]
  19 #
  20 # CDDL HEADER END
  21 #
  22
  23 #
  24 # Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  25 # Use is subject to license terms.
  26 #
  27
  28 # which_scm outputs two strings: one identifying the SCM in use, and
  29 # the second giving the root directory for the SCM, if known, or just
  30 # the current working directory if not known.
  31
  32 # There are three distinct types of SCM systems we can detect.  The first
  33 # type have a control directory per directory (RCS and SCCS), with no other
  34 # structure.  The second type have a control directory in each subdirectory
  35 # within a tree (CVS and SVN).  The last type have a single control
  36 # directory at the top of the tree (Teamware and Mercurial).
  37
  38 # If the common CODEMGR_WS variable is set, then we look there for the
  39 # SCM type and bail out if we can't determine it.
  40
  41 # If that variable is not set, then we start in the current directory
  42 # and work our way upwards until we find the top of the tree or we
  43 # encounter an error.
  44
  45 # We do handle nested SCM types, and report the innermost one, but if
  46 # you nest one of the "second type" systems within another instance of
  47 # itself, we'll keep going upwards and report the top of the nested
  48 # set of trees.
  49
  50
  51 # Check for well-known tree-type source code management (SCM) systems.
  52 function primary_type
  53 {
  54         typeset scmid
  55
  56         [ -d "$1/Codemgr_wsdata" ] && scmid="$scmid teamware"
  57         [ -d "$1/.hg" ] && scmid="$scmid mercurial"
  58         [ -d "$1/CVS" ] && scmid="$scmid cvs"
  59         [ -d "$1/.svn" ] && scmid="$scmid subversion"
  60         [ -d "$1/.git" ] && scmid="$scmid git"
  61         echo $scmid
  62 }
  63
  64 if [[ -n "$CODEMGR_WS" ]]; then
  65         if [[ ! -d "$CODEMGR_WS" ]]; then
  66                 print -u2 "which_scm: $CODEMGR_WS is not a directory."
  67                 exit 1
  68         fi
  69         set -- $(primary_type "$CODEMGR_WS")
  70         if [[ $# != 1 ]]; then
  71                 set -- unknown
  72         fi
  73         echo "$1 $CODEMGR_WS"
  74         exit 0
  75 fi
  76
  77 ORIG_CWD=$(pwd)
  78
  79 if [[ -d RCS ]]; then
  80         echo "rcs $ORIG_CWD"
  81         exit 0
  82 fi
  83
  84 # If it's not Teamware, it could just be local SCCS.
  85 LOCAL_TYPE=
  86 [[ -d SCCS ]] && LOCAL_TYPE="sccs"
  87
  88 # Scan upwards looking for top of tree.
  89 DIR=$ORIG_CWD
  90 CWD_TYPE=$(primary_type "$DIR")
  91 SCM_TYPE=
  92 while [[ "$DIR" != / ]]; do
  93         set -- $(primary_type "$DIR")
  94         if [[ $# > 1 ]]; then
  95                 echo "unknown $ORIG_CWD"
  96                 exit 0
  97         fi
  98         SCM_TYPE="$1"
  99         # We're done searching if we hit either a change in type or the top
 100         # of a "third type" control system.
 101         if [[ "$SCM_TYPE" != "$CWD_TYPE" || "$SCM_TYPE" == git || \
 102             "$SCM_TYPE" == mercurial || "$SCM_TYPE" == teamware ]]; then
 103                 break
 104         fi
 105         PREVDIR="$DIR"
 106         DIR=$(dirname "$DIR")
 107 done
 108
 109 # We assume here that the system root directory isn't the root of the SCM.
 110
 111 # Check for the "second type" of repository.  In all cases, we started
 112 # out in the tree and stepped out on the last iteration, so we want
 113 # $PREVDIR.
 114 if [[ "$CWD_TYPE" == cvs || "$CWD_TYPE" == subversion ]]; then
 115         echo "$CWD_TYPE $PREVDIR"
 116         exit 0
 117 fi
 118
 119 # If we still don't know what it is, then check for a local type in the
 120 # original directory.  If none, then we don't know what it is.
 121 if [[ -z "$SCM_TYPE" ]]; then
 122         if [[ -z "$LOCAL_TYPE" ]]; then
 123                 SCM_TYPE=unknown
 124         else
 125                 SCM_TYPE=$LOCAL_TYPE
 126                 DIR=$ORIG_CWD
 127         fi
 128 fi
 129
 130 echo "$SCM_TYPE $DIR"
 131 exit 0