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 devnull@localhost
  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 "
  40 case "$1" in
  41     -h|--help)
  42       echo "usage: $(basename "$0") $USAGE"
  43       echo ""
  44       echo "$LONG_USAGE"
  45       exit 0
  46 esac
  47 . "$(git --exec-path)/git-sh-setup"
  48 cd_to_toplevel
  49
  50 while case "$#" in 0) break ;; esac
  51 do
  52   case "$1" in
  53     -r|--r|--re|--rep|--repo)
  54       shift
  55       REPO="$1"
  56       ;;
  57     --q|--qu|--qui|--quie|--quiet)
  58       GFI_OPTS="$GFI_OPTS --quiet"
  59       ;;
  60     --force)
  61       # pass --force to git-fast-import and hg-fast-export.py
  62       GFI_OPTS="$GFI_OPTS --force"
  63       break
  64       ;;
  65     -*)
  66       # pass any other options down to hg2git.py
  67       break
  68       ;;
  69     *)
  70       break
  71       ;;
  72   esac
  73   shift
  74 done
  75
  76 # for convenience: get default repo from state file
  77 if [ x"$REPO" = x -a -f "$GIT_DIR/$PFX-$SFX_STATE" ] ; then
  78   REPO="`grep '^:repo ' "$GIT_DIR/$PFX-$SFX_STATE" | cut -d ' ' -f 2`"
  79   echo "Using last hg repository \"$REPO\""
  80 fi
  81
  82 if [  -z "$REPO" ]; then
  83     echo "no repo given, use -r flag"
  84     exit 1
  85 fi
  86
  87 # make sure we have a marks cache
  88 if [ ! -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
  89   touch "$GIT_DIR/$PFX-$SFX_MARKS"
  90 fi
  91
  92 # cleanup on exit
  93 trap 'rm -f "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp"' 0
  94
  95 _err1=
  96 _err2=
  97 exec 3>&1
  98 { read -r _err1 || :; read -r _err2 || :; } <<-EOT
  99 $(
 100   exec 4>&3 3>&1 1>&4 4>&-
 101   {
 102     _e1=0
 103     GIT_DIR="$GIT_DIR" $PYTHON "$ROOT/hg-fast-export.py" \
 104       --repo "$REPO" \
 105       --marks "$GIT_DIR/$PFX-$SFX_MARKS" \
 106       --mapping "$GIT_DIR/$PFX-$SFX_MAPPING" \
 107       --heads "$GIT_DIR/$PFX-$SFX_HEADS" \
 108       --status "$GIT_DIR/$PFX-$SFX_STATE" \
 109       "$@" 3>&- || _e1=$?
 110     echo $_e1 >&3
 111   } | \
 112   {
 113     _e2=0
 114     git fast-import $GFI_OPTS --export-marks="$GIT_DIR/$PFX-$SFX_MARKS.tmp" 3>&- || _e2=$?
 115     echo $_e2 >&3
 116   }
 117 )
 118 EOT
 119 exec 3>&-
 120 [ "$_err1" = 0 -a "$_err2" = 0 ] || exit 1
 121
 122 # move recent marks cache out of the way...
 123 if [ -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
 124   mv "$GIT_DIR/$PFX-$SFX_MARKS" "$GIT_DIR/$PFX-$SFX_MARKS.old"
 125 else
 126   touch "$GIT_DIR/$PFX-$SFX_MARKS.old"
 127 fi
 128
 129 # ...to create a new merged one
 130 cat "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp" \
 131 | uniq > "$GIT_DIR/$PFX-$SFX_MARKS"
 132
 133 # save SHA1s of current heads for incremental imports
 134 # and connectivity (plus sanity checking)
 135
 136 git branch --no-color | \
 137 while IFS= read -r head; do
 138   echo ":${head#??} $(git rev-parse "refs/heads/${head#??}")"
 139 done > "$GIT_DIR/$PFX-$SFX_HEADS"