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 while case "$#" in 0) break ;; esac
  63 do
  64   case "$1" in
  65     -r|--r|--re|--rep|--repo)
  66       shift
  67       REPO="$1"
  68       ;;
  69     --q|--qu|--qui|--quie|--quiet)
  70       GFI_OPTS="$GFI_OPTS --quiet"
  71       ;;
  72     --force)
  73       # pass --force to git-fast-import and hg-fast-export.py
  74       GFI_OPTS="$GFI_OPTS --force"
  75       break
  76       ;;
  77     -*)
  78       # pass any other options down to hg2git.py
  79       break
  80       ;;
  81     *)
  82       break
  83       ;;
  84   esac
  85   shift
  86 done
  87
  88 # for convenience: get default repo from state file
  89 if [ x"$REPO" = x -a -f "$GIT_DIR/$PFX-$SFX_STATE" ] ; then
  90   REPO="`grep '^:repo ' "$GIT_DIR/$PFX-$SFX_STATE" | cut -d ' ' -f 2`"
  91   echo "Using last hg repository \"$REPO\""
  92 fi
  93
  94 if [  -z "$REPO" ]; then
  95     echo "no repo given, use -r flag"
  96     exit 1
  97 fi
  98
  99 # make sure we have a marks cache
 100 if [ ! -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
 101   touch "$GIT_DIR/$PFX-$SFX_MARKS"
 102 fi
 103
 104 # cleanup on exit
 105 trap 'rm -f "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp"' 0
 106
 107 _err1=
 108 _err2=
 109 exec 3>&1
 110 { read -r _err1 || :; read -r _err2 || :; } <<-EOT
 111 $(
 112   exec 4>&3 3>&1 1>&4 4>&-
 113   {
 114     _e1=0
 115     GIT_DIR="$GIT_DIR" $PYTHON "$ROOT/hg-fast-export.py" \
 116       --repo "$REPO" \
 117       --marks "$GIT_DIR/$PFX-$SFX_MARKS" \
 118       --mapping "$GIT_DIR/$PFX-$SFX_MAPPING" \
 119       --heads "$GIT_DIR/$PFX-$SFX_HEADS" \
 120       --status "$GIT_DIR/$PFX-$SFX_STATE" \
 121       "$@" 3>&- || _e1=$?
 122     echo $_e1 >&3
 123   } | \
 124   {
 125     _e2=0
 126     git fast-import $GFI_OPTS --export-marks="$GIT_DIR/$PFX-$SFX_MARKS.tmp" 3>&- || _e2=$?
 127     echo $_e2 >&3
 128   }
 129 )
 130 EOT
 131 exec 3>&-
 132 [ "$_err1" = 0 -a "$_err2" = 0 ] || exit 1
 133
 134 # move recent marks cache out of the way...
 135 if [ -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
 136   mv "$GIT_DIR/$PFX-$SFX_MARKS" "$GIT_DIR/$PFX-$SFX_MARKS.old"
 137 else
 138   touch "$GIT_DIR/$PFX-$SFX_MARKS.old"
 139 fi
 140
 141 # ...to create a new merged one
 142 cat "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp" \
 143 | uniq > "$GIT_DIR/$PFX-$SFX_MARKS"
 144
 145 # save SHA1s of current heads for incremental imports
 146 # and connectivity (plus sanity checking)
 147 for head in `git branch | sed 's#^..##'` ; do
 148   id="`git rev-parse refs/heads/$head`"
 149   echo ":$head $id"
 150 done > "$GIT_DIR/$PFX-$SFX_HEADS"
 151
 152 # check diff with color:
 153 # ( for i in `find . -type f | grep -v '\.git'` ; do diff -u $i $REPO/$i ; done | cdiff ) | less -r