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="$(cd "$(dirname "$0")" && pwd -P)"
   7 REPO=""
   8 PFX="hg2git"
   9 SFX_MAPPING="mapping"
  10 SFX_MARKS="marks"
  11 SFX_HEADS="heads"
  12 SFX_STATE="state"
  13 GFI_OPTS=""
  14 PYTHON=${PYTHON:-python}
  15
  16 USAGE="[--quiet] [-r <repo>] [--force] [-m <max>] [-s] [--hgtags] [--flatten] [-A <file>] [-U <addr>] [-M <name>] [-o <name>] [--hg-hash]"
  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         --flatten Create one-level ref names (convert '/' to '_')
  32         -A <file> Read author map from file
  33                   (Same as in git-svnimport(1) and git-cvsimport(1))
  34         -U <addr> Use <addr> as unknown email instead of 'unknown'
  35                   (previous default was 'devnull@localhost')
  36         -M <name> Set the default branch name (defaults to 'master')
  37         -o <name> Use <name> as branch namespace to track upstream (eg 'origin')
  38         --hg-hash Annotate commits with the hg hash as git notes in the
  39                   hg namespace.
  40 "
  41 case "$1" in
  42     -h|--help)
  43       echo "usage: $(basename "$0") $USAGE"
  44       echo ""
  45       echo "$LONG_USAGE"
  46       exit 0
  47 esac
  48 . "$(git --exec-path)/git-sh-setup"
  49 cd_to_toplevel
  50
  51 while case "$#" in 0) break ;; esac
  52 do
  53   case "$1" in
  54     -r|--r|--re|--rep|--repo)
  55       shift
  56       REPO="$1"
  57       ;;
  58     --q|--qu|--qui|--quie|--quiet)
  59       GFI_OPTS="$GFI_OPTS --quiet"
  60       ;;
  61     --force)
  62       # pass --force to git-fast-import and hg-fast-export.py
  63       GFI_OPTS="$GFI_OPTS --force"
  64       break
  65       ;;
  66     -*)
  67       # pass any other options down to hg2git.py
  68       break
  69       ;;
  70     *)
  71       break
  72       ;;
  73   esac
  74   shift
  75 done
  76
  77 # for convenience: get default repo from state file
  78 if [ x"$REPO" = x -a -f "$GIT_DIR/$PFX-$SFX_STATE" ] ; then
  79   REPO="`grep '^:repo ' "$GIT_DIR/$PFX-$SFX_STATE" | cut -d ' ' -f 2`"
  80   echo "Using last hg repository \"$REPO\""
  81 fi
  82
  83 if [  -z "$REPO" ]; then
  84     echo "no repo given, use -r flag"
  85     exit 1
  86 fi
  87
  88 # make sure we have a marks cache
  89 if [ ! -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
  90   touch "$GIT_DIR/$PFX-$SFX_MARKS"
  91 fi
  92 rm -f "$GIT_DIR/$PFX-$SFX_MARKS.new"
  93
  94 # cleanup on exit
  95 trap 'rm -f "$GIT_DIR/$PFX-$SFX_MARKS.new"' 0
  96
  97 _err1=
  98 _err2=
  99 exec 3>&1
 100 { read -r _err1 || :; read -r _err2 || :; } <<-EOT
 101 $(
 102   exec 4>&3 3>&1 1>&4 4>&-
 103   {
 104     _e1=0
 105     GIT_DIR="$GIT_DIR" $PYTHON "$ROOT/hg-fast-export.py" \
 106       --repo "$REPO" \
 107       --marks "$GIT_DIR/$PFX-$SFX_MARKS" \
 108       --mapping "$GIT_DIR/$PFX-$SFX_MAPPING" \
 109       --heads "$GIT_DIR/$PFX-$SFX_HEADS" \
 110       --status "$GIT_DIR/$PFX-$SFX_STATE" \
 111       "$@" 3>&- || _e1=$?
 112     echo $_e1 >&3
 113   } | \
 114   {
 115     _e2=0
 116     git fast-import \
 117       --import-marks="$GIT_DIR/$PFX-$SFX_MARKS" \
 118       --export-marks="$GIT_DIR/$PFX-$SFX_MARKS.new" \
 119       $GFI_OPTS 3>&- || _e2=$?
 120     echo $_e2 >&3
 121   }
 122 )
 123 EOT
 124 exec 3>&-
 125 [ "$_err1" = 0 -a "$_err2" = 0 ] || exit 1
 126 mv -f "$GIT_DIR/$PFX-$SFX_MARKS.new" "$GIT_DIR/$PFX-$SFX_MARKS"
 127
 128 # save SHA1s of current heads for incremental imports
 129 # and connectivity (plus sanity checking)
 130
 131 git for-each-ref --format='%(refname) %(objectname)' refs/heads | \
 132 LC_ALL=C sed -e 's,^refs/heads/,:,' > "$GIT_DIR/$PFX-$SFX_HEADS"