hg-fast-export.sh

   1 #!/bin/sh
   2
   3 # Copyright (c) 2007, 2008 Rocco Rutte <pdmef@gmx.net> and others.
   4 # License: MIT <http://www.opensource.org/licenses/mit-license.php>
   5
   6 ROOT="$(dirname "$(which "$0")")"
   7 REPO=""
   8 PFX="hg2git"
   9 SFX_MAPPING="mapping"
  10 SFX_MARKS="marks"
  11 SFX_HEADS="heads"
  12 SFX_STATE="state"
  13 GFI_OPTS=""
  14 PYTHON=${PYTHON:-python}
  15
  16 USAGE="[--quiet] [-r <repo>] [--force] [-m <max>] [-s] [--hgtags] [-A <file>] [-B <file>] [-T <file>] [-M <name>] [-o <name>] [--hg-hash] [-e <encoding>]"
  17 LONG_USAGE="Import hg repository <repo> up to either tip or <max>
  18 If <repo> is omitted, use last hg repository as obtained from state file,
  19 GIT_DIR/$PFX-$SFX_STATE by default.
  20
  21 Note: The argument order matters.
  22
  23 Options:
  24         --quiet   Passed to git-fast-import(1)
  25         -r <repo> Mercurial repository to import
  26         --force   Ignore validation errors when converting, and pass --force
  27                   to git-fast-import(1)
  28         -m <max>  Maximum revision to import
  29         -s        Enable parsing Signed-off-by lines
  30         --hgtags  Enable exporting .hgtags files
  31         -A <file> Read author map from file
  32                   (Same as in git-svnimport(1) and git-cvsimport(1))
  33         -B <file> Read branch map from file
  34         -T <file> Read tags map from file
  35         -M <name> Set the default branch name (defaults to 'master')
  36         -o <name> Use <name> as branch namespace to track upstream (eg 'origin')
  37         --hg-hash Annotate commits with the hg hash as git notes in the
  38                   hg namespace.
  39         -e <encoding> Assume commit and author strings retrieved from
  40                       Mercurial are encoded in <encoding>
  41         --fe <filename_encoding> Assume filenames from Mercurial are encoded
  42                                  in <filename_encoding>
  43 "
  44 case "$1" in
  45     -h|--help)
  46       echo "usage: $(basename "$0") $USAGE"
  47       echo ""
  48       echo "$LONG_USAGE"
  49       exit 0
  50 esac
  51
  52 IS_BARE=$(git rev-parse --is-bare-repository) \
  53     || (echo "Could not find git repo" ; exit 1)
  54 if test "z$IS_BARE" != ztrue; then
  55    # This is not a bare repo, cd to the toplevel
  56    TOPLEVEL=$(git rev-parse --show-toplevel) \
  57        || (echo "Could not find git repo toplevel" ; exit 1)
  58    cd $TOPLEVEL || exit 1
  59 fi
  60 GIT_DIR=$(git rev-parse --git-dir) || (echo "Could not find git repo" ; exit 1)
  61
  62
  63 IGNORECASEWARN=""
  64 IGNORECASE=`git config core.ignoreCase`
  65 if [ "true" = "$IGNORECASE" ]; then
  66     IGNORECASEWARN="true"
  67 fi;
  68
  69
  70 while case "$#" in 0) break ;; esac
  71 do
  72   case "$1" in
  73     -r|--r|--re|--rep|--repo)
  74       shift
  75       REPO="$1"
  76       ;;
  77     --q|--qu|--qui|--quie|--quiet)
  78       GFI_OPTS="$GFI_OPTS --quiet"
  79       ;;
  80     --force)
  81       # pass --force to git-fast-import and hg-fast-export.py
  82       GFI_OPTS="$GFI_OPTS --force"
  83       IGNORECASEWARN="";
  84       break
  85       ;;
  86     -*)
  87       # pass any other options down to hg2git.py
  88       break
  89       ;;
  90     *)
  91       break
  92       ;;
  93   esac
  94   shift
  95 done
  96
  97 if [ ! -z "$IGNORECASEWARN" ]; then
  98     echo "Error: The option core.ignoreCase is set to true in the git"
  99     echo "repository. This will produce empty changesets for renames that just"
 100     echo "change the case of the file name."
 101     echo "Use --force to skip this check or change the option with"
 102     echo "git config core.ignoreCase false"
 103     exit 1
 104 fi;
 105
 106 # Make a backup copy of each state file
 107 for i in $SFX_STATE $SFX_MARKS $SFX_MAPPING $SFX_HEADS ; do
 108     if [ -f "$GIT_DIR/$PFX-$i" ] ; then
 109         cp "$GIT_DIR/$PFX-$i" "$GIT_DIR/$PFX-$i~"
 110     fi
 111 done
 112
 113 # for convenience: get default repo from state file
 114 if [ x"$REPO" = x -a -f "$GIT_DIR/$PFX-$SFX_STATE" ] ; then
 115   REPO="`grep '^:repo ' "$GIT_DIR/$PFX-$SFX_STATE" | cut -d ' ' -f 2`"
 116   echo "Using last hg repository \"$REPO\""
 117 fi
 118
 119 if [  -z "$REPO" ]; then
 120     echo "no repo given, use -r flag"
 121     exit 1
 122 fi
 123
 124 # make sure we have a marks cache
 125 if [ ! -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
 126   touch "$GIT_DIR/$PFX-$SFX_MARKS"
 127 fi
 128
 129 # cleanup on exit
 130 trap 'rm -f "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp"' 0
 131
 132 _err1=
 133 _err2=
 134 exec 3>&1
 135 { read -r _err1 || :; read -r _err2 || :; } <<-EOT
 136 $(
 137   exec 4>&3 3>&1 1>&4 4>&-
 138   {
 139     _e1=0
 140     GIT_DIR="$GIT_DIR" $PYTHON "$ROOT/hg-fast-export.py" \
 141       --repo "$REPO" \
 142       --marks "$GIT_DIR/$PFX-$SFX_MARKS" \
 143       --mapping "$GIT_DIR/$PFX-$SFX_MAPPING" \
 144       --heads "$GIT_DIR/$PFX-$SFX_HEADS" \
 145       --status "$GIT_DIR/$PFX-$SFX_STATE" \
 146       "$@" 3>&- || _e1=$?
 147     echo $_e1 >&3
 148   } | \
 149   {
 150     _e2=0
 151     git fast-import $GFI_OPTS --export-marks="$GIT_DIR/$PFX-$SFX_MARKS.tmp" 3>&- || _e2=$?
 152     echo $_e2 >&3
 153   }
 154 )
 155 EOT
 156 exec 3>&-
 157 [ "$_err1" = 0 -a "$_err2" = 0 ] || exit 1
 158
 159 # move recent marks cache out of the way...
 160 if [ -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
 161   mv "$GIT_DIR/$PFX-$SFX_MARKS" "$GIT_DIR/$PFX-$SFX_MARKS.old"
 162 else
 163   touch "$GIT_DIR/$PFX-$SFX_MARKS.old"
 164 fi
 165
 166 # ...to create a new merged one
 167 cat "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp" \
 168 | uniq > "$GIT_DIR/$PFX-$SFX_MARKS"
 169
 170 # save SHA1s of current heads for incremental imports
 171 # and connectivity (plus sanity checking)
 172 for head in `git branch | sed 's#^..##'` ; do
 173   id="`git rev-parse refs/heads/$head`"
 174   echo ":$head $id"
 175 done > "$GIT_DIR/$PFX-$SFX_HEADS"
 176
 177 # check diff with color:
 178 # ( for i in `find . -type f | grep -v '\.git'` ; do diff -u $i $REPO/$i ; done | cdiff ) | less -r