git-migrate-fast.sh

   1 #!/bin/bash
   2 set -e
   3
   4 # Depends: python-yaml, python-mako
   5 # and svn-all-fast-export, which comes from git://repo.or.cz/svn-all-fast-export
   6 # (except you actually want git://andersk.mit.edu/svn-all-fast-export localtime)
   7 # and builds with `qmake && make` with
   8 #   Build-Depends: libqt4-dev, libsvn-dev
   9
  10 # Usage: ./git-migrate-fast.sh [svn-uri]
  11 # Exports into new subdir ./git .
  12 SVN=${1:-/mit/xvm/svn}
  13
  14 mako-render rules.mako > rules
  15
  16 packages=($(python -c '
  17 import yaml
  18 svn = yaml.load(file("svn.yml"))
  19 packages = svn["packages"]
  20 current_packages = sorted(package for package in packages
  21                           if "punt" not in packages[package] and
  22                              "merge" not in packages[package])
  23 print "\n".join(current_packages)
  24 '))
  25
  26 rm git -rf
  27 mkdir git
  28 cd git
  29
  30 sed -n 's/^create repository // p' ../rules | while read repo; do
  31     mkdir -p "$repo" && GIT_DIR="$repo" git init --bare && GIT_DIR="$repo" git symbolic-ref HEAD refs/heads/prod
  32 done
  33
  34 svn-all-fast-export --identity-map ../authors ../rules "$SVN"
  35
  36 pushd packages/invirt-dev.git
  37 GIT_COMMITTER_NAME='Eric Price' GIT_COMMITTER_EMAIL='ecprice@mit.edu' GIT_COMMITTER_DATE='1206829393 -0400' \
  38     git tag -a sipb-xen-dev/13 sipb-xen-dev/14~2 -F - <<EOF
  39 Tag 13 of sipb-xen-dev
  40
  41 svn path=/package_tags/sipb-xen-dev/13/; revision=316
  42 EOF
  43 popd
  44
  45 pushd packages/invirt-remote.git
  46 echo $(git rev-parse 0.2.0^0 invirt-remote-server invirt-remote-host) >> info/grafts
  47 git filter-branch --tag-name-filter cat -- ^invirt-remote-server ^invirt-remote-host --all
  48 rm -rf info/grafts refs/original refs/heads/invirt-remote-server refs/heads/invirt-remote-host
  49 popd
  50
  51 pushd packages/invirt-console.git
  52 echo $(git rev-parse 0.2.0^0 0.2.0^ invirt-console-host) >> info/grafts
  53 git filter-branch --tag-name-filter cat -- ^0.2.0^ ^invirt-console-host --all
  54 rm -rf info/grafts refs/original refs/heads/invirt-console-host
  55 popd
  56
  57 pushd packages/invirt-dns.git
  58 echo $(git rev-parse sipb-xen-dns/1~10 sipb-xen-dns/1~11 dns) >> info/grafts
  59 git filter-branch --tag-name-filter cat -- ^sipb-xen-dns/1~11 ^dns --all
  60 rm -rf info/grafts refs/original refs/heads/dns
  61 popd
  62
  63 pushd packages/invirt-database.git
  64 echo $(git rev-parse invirt-database-server/0.0.1^0 0.0.1^) >> info/grafts
  65 echo $(git rev-parse 0.2.0^0 0.2.0^ invirt-database-server) >> info/grafts
  66 git filter-branch --tag-name-filter cat -- ^0.2.0^ --all
  67 rm -rf info/grafts refs/original refs/heads/invirt-database-server
  68 popd
  69
  70 pushd packages/invirt-web.git
  71 echo $(git rev-parse 0.1.0^0 0.0.24^0 cherrypy-rebased^1) >> info/grafts
  72 echo $(git rev-parse 0.1.1~3 0.1.0^0 cherrypy-rebased^0) >> info/grafts
  73 git filter-branch --tag-name-filter cat -- ^0.0.24^ --all
  74 rm -rf info/grafts refs/original
  75 popd
  76
  77 pushd packages/python-routefs.git
  78 git fetch -t git://github.com/ebroder/python-routefs.git
  79 git branch -f upstream 1.0.1
  80 git branch -f prod 1.0.1-1
  81 popd
  82
  83 pushd packages/python-afs.git
  84 git fetch -t git://github.com/ebroder/pyafs.git
  85 git branch -f upstream 0.1.1
  86 git branch -f prod 0.1.1-1
  87 popd
  88
  89 for package in "${packages[@]}"; do
  90     pushd "packages/$package.git"
  91     git branch dev prod
  92     popd
  93 done
  94
  95 mkdir packages.git
  96 pushd packages.git
  97 git init --bare
  98 git symbolic-ref HEAD refs/heads/prod
  99 (
 100     echo 'commit refs/heads/prod'
 101     echo 'mark :1'
 102     echo 'committer Invirt Git Import <invirt@mit.edu> now'
 103     echo 'data <<EOF'
 104     echo 'Initial superproject creation.'
 105     echo 'EOF'
 106     for package in "${packages[@]}"; do
 107         pushd "../packages/$package.git" &>/dev/null
 108         commit="$(git rev-parse refs/heads/prod)"
 109         popd &>/dev/null
 110
 111         echo "M 160000 $commit $package"
 112     done
 113
 114     echo 'M 100644 inline .gitmodules'
 115     echo 'data <<EOF'
 116     for package in "${packages[@]}"; do
 117         printf '[submodule "%s"]\n' "$package"
 118         printf '\tpath = %s\n' "$package"
 119         printf '\turl = ../packages/%s.git\n' "$package"
 120     done
 121     echo 'EOF'
 122
 123     echo 'reset refs/heads/dev'
 124     echo 'from :1'
 125
 126     echo 'reset HEAD'
 127     echo 'from :1'
 128 ) | git fast-import --date-format=now
 129 popd
 130
 131 echo
 132 echo 'The Git migration was successful.'