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 $0`"
   7 REPO=""
   8 PFX="hg2git"
   9 SFX_MAPPING="mapping"
  10 SFX_MARKS="marks"
  11 SFX_HEADS="heads"
  12 SFX_STATE="state"
  13 GFI_OPTS=""
  14 PYTHON=${PYTHON:-python}
  15
  16 USAGE="[--quiet] [-r <repo>] [--force] [-m <max>] [-s] [-A <file>] [-M <name>] [-o <name>]"
  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         -m      Maximum revision to import
  25         --quiet Passed to git-fast-import(1)
  26         -s      Enable parsing Signed-off-by lines
  27         -A      Read author map from file
  28                 (Same as in git-svnimport(1) and git-cvsimport(1))
  29         -r      Mercurial repository to import
  30         -M      Set the default branch name (default to 'master')
  31         -o      Use <name> as branch namespace to track upstream (eg 'origin')
  32         --force Ignore validation errors when converting, and pass --force
  33                 to git-fast-import(1)
  34 "
  35
  36 . "$(git --exec-path)/git-sh-setup"
  37 cd_to_toplevel
  38
  39 while case "$#" in 0) break ;; esac
  40 do
  41   case "$1" in
  42     -r|--r|--re|--rep|--repo)
  43       shift
  44       REPO="$1"
  45       ;;
  46     --q|--qu|--qui|--quie|--quiet)
  47       GFI_OPTS="$GFI_OPTS --quiet"
  48       ;;
  49     --force)
  50       # pass --force to git-fast-import and hg-fast-export.py
  51       GFI_OPTS="$GFI_OPTS --force"
  52       break
  53       ;;
  54     -*)
  55       # pass any other options down to hg2git.py
  56       break
  57       ;;
  58     *)
  59       break
  60       ;;
  61   esac
  62   shift
  63 done
  64
  65 # for convenience: get default repo from state file
  66 if [ x"$REPO" = x -a -f "$GIT_DIR/$PFX-$SFX_STATE" ] ; then
  67   REPO="`egrep '^:repo ' "$GIT_DIR/$PFX-$SFX_STATE" | cut -d ' ' -f 2`"
  68   echo "Using last hg repository \"$REPO\""
  69 fi
  70
  71 if [  -z "$REPO" ]; then
  72     echo "no repo given, use -r flag"
  73     exit 1
  74 fi
  75
  76 # make sure we have a marks cache
  77 if [ ! -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
  78   touch "$GIT_DIR/$PFX-$SFX_MARKS"
  79 fi
  80
  81 # cleanup on exit
  82 trap 'rm -f "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp"' 0
  83
  84 _err1=
  85 _err2=
  86 exec 3>&1
  87 { read -r _err1 || :; read -r _err2 || :; } <<-EOT
  88 $(
  89   exec 4>&3 3>&1 1>&4 4>&-
  90   {
  91     _e1=0
  92     GIT_DIR="$GIT_DIR" $PYTHON "$ROOT/hg-fast-export.py" \
  93       --repo "$REPO" \
  94       --marks "$GIT_DIR/$PFX-$SFX_MARKS" \
  95       --mapping "$GIT_DIR/$PFX-$SFX_MAPPING" \
  96       --heads "$GIT_DIR/$PFX-$SFX_HEADS" \
  97       --status "$GIT_DIR/$PFX-$SFX_STATE" \
  98       "$@" 3>&- || _e1=$?
  99     echo $_e1 >&3
 100   } | \
 101   {
 102     _e2=0
 103     git fast-import $GFI_OPTS --export-marks="$GIT_DIR/$PFX-$SFX_MARKS.tmp" 3>&- || _e2=$?
 104     echo $_e2 >&3
 105   }
 106 )
 107 EOT
 108 exec 3>&-
 109 [ "$_err1" = 0 -a "$_err2" = 0 ] || exit 1
 110
 111 # move recent marks cache out of the way...
 112 if [ -f "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
 113   mv "$GIT_DIR/$PFX-$SFX_MARKS" "$GIT_DIR/$PFX-$SFX_MARKS.old"
 114 else
 115   touch "$GIT_DIR/$PFX-$SFX_MARKS.old"
 116 fi
 117
 118 # ...to create a new merged one
 119 cat "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.tmp" \
 120 | uniq > "$GIT_DIR/$PFX-$SFX_MARKS"
 121
 122 # save SHA1s of current heads for incremental imports
 123 # and connectivity (plus sanity checking)
 124 for head in `git branch | sed 's#^..##'` ; do
 125   id="`git rev-parse $head`"
 126   echo ":$head $id"
 127 done > "$GIT_DIR/$PFX-$SFX_HEADS"
 128
 129 # check diff with color:
 130 # ( for i in `find . -type f | grep -v '\.git'` ; do diff -u $i $REPO/$i ; done | cdiff ) | less -r