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 PATH="$(git --exec-path):$PATH" && export PATH
  49 . git-sh-setup
  50 cd_to_toplevel
  51
  52 while case "$#" in 0) break ;; esac
  53 do
  54   case "$1" in
  55     -r|--r|--re|--rep|--repo)
  56       shift
  57       REPO="$1"
  58       ;;
  59     --q|--qu|--qui|--quie|--quiet)
  60       GFI_OPTS="$GFI_OPTS --quiet"
  61       ;;
  62     --force)
  63       # pass --force to git-fast-import and hg-fast-export.py
  64       GFI_OPTS="$GFI_OPTS --force"
  65       break
  66       ;;
  67     -*)
  68       # pass any other options down to hg2git.py
  69       break
  70       ;;
  71     *)
  72       break
  73       ;;
  74   esac
  75   shift
  76 done
  77
  78 # for convenience: get default repo from state file
  79 if [ x"$REPO" = x -a -f "$GIT_DIR/$PFX-$SFX_STATE" ] ; then
  80   REPO="`grep '^:repo ' "$GIT_DIR/$PFX-$SFX_STATE" | cut -d ' ' -f 2`"
  81   echo "Using last hg repository \"$REPO\""
  82 fi
  83
  84 if [  -z "$REPO" ]; then
  85     echo "no repo given, use -r flag"
  86     exit 1
  87 fi
  88
  89 # cleanup on exit
  90 trap 'rm -f "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.new"' 0
  91
  92 rm -f "$GIT_DIR/$PFX-$SFX_MARKS.old" "$GIT_DIR/$PFX-$SFX_MARKS.new"
  93 if [ -f "$GIT_DIR/$PFX-$SFX_MARKS" -a -s "$GIT_DIR/$PFX-$SFX_MARKS" ] ; then
  94   # remove any marks that are no longer valid (e.g. gc'd "unnamed" heads)
  95   LC_ALL=C sed 's/^:\([^ ][^ ]*\) \([^ ][^ ]*\)$/\2 \1/' <"$GIT_DIR/$PFX-$SFX_MARKS" | \
  96   git cat-file --batch-check=':%(rest) %(objectname)' | \
  97   LC_ALL=C sed '/ missing$/d' >"$GIT_DIR/$PFX-$SFX_MARKS.old"
  98   notes=
  99   for arg; do if [ "$arg" = "--hg-hash" ]; then notes=1; break; fi; done
 100   # for --hg-hash run "notes prune" on refs/notes/hg if it exists and any marks were missing
 101   if [ -n "$notes" ] && \
 102      git rev-parse --quiet --verify refs/notes/hg >/dev/null && \
 103      ! LC_ALL=C cmp -s "$GIT_DIR/$PFX-$SFX_MARKS" "$GIT_DIR/$PFX-$SFX_MARKS.old"; then
 104     nm='hg-fast-export'
 105     GIT_AUTHOR_NAME="$nm" GIT_COMMITTER_NAME="$nm" \
 106     GIT_AUTHOR_EMAIL="$nm" GIT_COMMITTER_EMAIL="$nm" \
 107     git notes --ref=refs/notes/hg prune
 108   fi
 109 else
 110   # make sure we have a marks cache
 111   >"$GIT_DIR/$PFX-$SFX_MARKS.old"
 112 fi
 113
 114 _err1=
 115 _err2=
 116 exec 3>&1
 117 { read -r _err1 || :; read -r _err2 || :; } <<-EOT
 118 $(
 119   exec 4>&3 3>&1 1>&4 4>&-
 120   {
 121     _e1=0
 122     GIT_DIR="$GIT_DIR" $PYTHON "$ROOT/hg-fast-export.py" \
 123       --repo "$REPO" \
 124       --marks "$GIT_DIR/$PFX-$SFX_MARKS.old" \
 125       --mapping "$GIT_DIR/$PFX-$SFX_MAPPING" \
 126       --heads "$GIT_DIR/$PFX-$SFX_HEADS" \
 127       --status "$GIT_DIR/$PFX-$SFX_STATE" \
 128       "$@" 3>&- || _e1=$?
 129     echo $_e1 >&3
 130   } | \
 131   {
 132     _e2=0
 133     git fast-import \
 134       --import-marks="$GIT_DIR/$PFX-$SFX_MARKS.old" \
 135       --export-marks="$GIT_DIR/$PFX-$SFX_MARKS.new" \
 136       $GFI_OPTS 3>&- || _e2=$?
 137     echo $_e2 >&3
 138   }
 139 )
 140 EOT
 141 exec 3>&-
 142 [ "$_err1" = 0 -a "$_err2" = 0 ] || exit 1
 143 mv -f "$GIT_DIR/$PFX-$SFX_MARKS.new" "$GIT_DIR/$PFX-$SFX_MARKS"
 144 rm -f "$GIT_DIR/$PFX-$SFX_MARKS.old"
 145
 146 # save SHA1s of current heads for incremental imports
 147 # and connectivity (plus sanity checking)
 148
 149 git for-each-ref --format='%(refname) %(objectname)' refs/heads | \
 150 LC_ALL=C sed -e 's,^refs/heads/,:,' > "$GIT_DIR/$PFX-$SFX_HEADS"