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 READLINK="readlink"
   7 if command -v greadlink > /dev/null; then
   8   READLINK="greadlink" # Prefer greadlink over readlink
   9 fi
  10 ROOT="$(dirname "$($READLINK -f "$(which "$0")")")"
  11 REPO=""
  12 PFX="hg2git"
  13 SFX_MAPPING="mapping"
  14 SFX_MARKS="marks"
  15 SFX_HEADS="heads"
  16 SFX_STATE="state"
  17 GFI_OPTS=""
  18 PYTHON=${PYTHON:-python}
  19
  20 USAGE="[--quiet] [-r <repo>] [--force] [-m <max>] [-s] [--hgtags] [-A <file>] [-B <file>] [-T <file>] [-M <name>] [-o <name>] [--hg-hash] [-e <encoding>]"
  21 LONG_USAGE="Import hg repository <repo> up to either tip or <max>
  22 If <repo> is omitted, use last hg repository as obtained from state file,
  23 GIT_DIR/$PFX-$SFX_STATE by default.
  24
  25 Note: The argument order matters.
  26
  27 Options:
  28         --quiet   Passed to git-fast-import(1)
  29         -r <repo> Mercurial repository to import
  30         --force   Ignore validation errors when converting, and pass --force
  31                   to git-fast-import(1)
  32         -m <max>  Maximum revision to import
  33         -s        Enable parsing Signed-off-by lines
  34         --hgtags  Enable exporting .hgtags files
  35         -A <file> Read author map from file
  36                   (Same as in git-svnimport(1) and git-cvsimport(1))
  37         -B <file> Read branch map from file
  38         -T <file> Read tags map from file
  39         -M <name> Set the default branch name (defaults to 'master')
  40         -o <name> Use <name> as branch namespace to track upstream (eg 'origin')
  41         --hg-hash Annotate commits with the hg hash as git notes in the
  42                   hg namespace.
  43         -e <encoding> Assume commit and author strings retrieved from
  44                       Mercurial are encoded in <encoding>
  45         --fe <filename_encoding> Assume filenames from Mercurial are encoded
  46                                  in <filename_encoding>
  47 "
  48 case "$1" in
  49     -h|--help)
  50       echo "usage: $(basename "$0") $USAGE"
  51       echo ""
  52       echo "$LONG_USAGE"
  53       exit 0
  54 esac
  55
  56 IS_BARE=$(git rev-parse --is-bare-repository) \
  57     || (echo "Could not find git repo" ; exit 1)
  58 if test "z$IS_BARE" != ztrue; then
  59    # This is not a bare repo, cd to the toplevel
  60    TOPLEVEL=$(git rev-parse --show-toplevel) \
  61        || (echo "Could not find git repo toplevel" ; exit 1)
  62    cd $TOPLEVEL || exit 1
  63 fi
  64 GIT_DIR=$(git rev-parse --git-dir) || (echo "Could not find git repo" ; exit 1)
  65
  66
  67 IGNORECASEWARN=""
  68 IGNORECASE=`git config core.ignoreCase`
  69 if [ "true" = "$IGNORECASE" ]; then
  70     IGNORECASEWARN="true"
  71 fi;
  72
  73
  74 while case "$#" in 0) break ;; esac
  75 do
  76   case "$1" in
  77     -r|--r|--re|--rep|--repo)
  78       shift
  79       REPO="$1"
  80       ;;
  81     --q|--qu|--qui|--quie|--quiet)
  82       GFI_OPTS="$GFI_OPTS --quiet"
  83       ;;
  84     --force)
  85       # pass --force to git-fast-import and hg-fast-export.py
  86       GFI_OPTS="$GFI_OPTS --force"
  87       IGNORECASEWARN="";
  88       break
  89       ;;
  90     -*)
  91       # pass any other options down to hg2git.py
  92       break
  93       ;;
  94     *)
  95       break
  96       ;;
  97   esac
  98   shift
  99 done
 100
 101 if [ ! -z "$IGNORECASEWARN" ]; then
 102     echo "Error: The option core.ignoreCase is set to true in the git"
 103     echo "repository. This will produce empty changesets for renames that just"
 104     echo "change the case of the file name."
 105     echo "Use --force to skip this check or change the option with"
 106     echo "git config core.ignoreCase false"
 107     exit 1
 108 fi;
 109
 110 # Make a backup copy of each state file
 111 for i in $SFX_STATE $SFX_MARKS $SFX_MAPPING $SFX_HEADS ; do
 112     if [ -f "$GIT_DIR/$PFX-$i" ] ; then
 113         cp "$GIT_DIR/$PFX-$i" "$GIT_DIR/$PFX-$i~"
 114     fi
 115 done
 116
 117 # for convenience: get default repo from state file
 118 if [ x"$REPO" = x -a -f "$GIT_DIR/$PFX-$SFX_STATE" ] ; then
 119   REPO="`grep '^:repo ' "$GIT_DIR/$PFX-$SFX_STATE" | cut -d ' ' -f 2`"
 120   echo "Using last hg repository \"$REPO\""
 121 fi
 122
 123 if [  -z "$REPO" ]; then
 124     echo "no repo given, use -r flag"
 125     exit 1
 126 fi
 127
 128 # make sure we have a marks cache
 129 if [ ! -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
 130   touch "$GIT_DIR/$PFX-$SFX_MARKS"
 131 fi
 132
 133 # cleanup on exit
 134 trap 'rm -f "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp"' 0
 135
 136 _err1=
 137 _err2=
 138 exec 3>&1
 139 { read -r _err1 || :; read -r _err2 || :; } <<-EOT
 140 $(
 141   exec 4>&3 3>&1 1>&4 4>&-
 142   {
 143     _e1=0
 144     GIT_DIR="$GIT_DIR" $PYTHON "$ROOT/hg-fast-export.py" \
 145       --repo "$REPO" \
 146       --marks "$GIT_DIR/$PFX-$SFX_MARKS" \
 147       --mapping "$GIT_DIR/$PFX-$SFX_MAPPING" \
 148       --heads "$GIT_DIR/$PFX-$SFX_HEADS" \
 149       --status "$GIT_DIR/$PFX-$SFX_STATE" \
 150       "$@" 3>&- || _e1=$?
 151     echo $_e1 >&3
 152   } | \
 153   {
 154     _e2=0
 155     git fast-import $GFI_OPTS --export-marks="$GIT_DIR/$PFX-$SFX_MARKS.tmp" 3>&- || _e2=$?
 156     echo $_e2 >&3
 157   }
 158 )
 159 EOT
 160 exec 3>&-
 161 [ "$_err1" = 0 -a "$_err2" = 0 ] || exit 1
 162
 163 # move recent marks cache out of the way...
 164 if [ -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
 165   mv "$GIT_DIR/$PFX-$SFX_MARKS" "$GIT_DIR/$PFX-$SFX_MARKS.old"
 166 else
 167   touch "$GIT_DIR/$PFX-$SFX_MARKS.old"
 168 fi
 169
 170 # ...to create a new merged one
 171 cat "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp" \
 172 | uniq > "$GIT_DIR/$PFX-$SFX_MARKS"
 173
 174 # save SHA1s of current heads for incremental imports
 175 # and connectivity (plus sanity checking)
 176 for head in `git branch | sed 's#^..##'` ; do
 177   id="`git rev-parse refs/heads/$head`"
 178   echo ":$head $id"
 179 done > "$GIT_DIR/$PFX-$SFX_HEADS"
 180
 181 # check diff with color:
 182 # ( for i in `find . -type f | grep -v '\.git'` ; do diff -u $i $REPO/$i ; done | cdiff ) | less -r