contrib/gcc-git-customization.sh

   1 #!/bin/sh
   2
   3 # Script to add some local git customizations suitable for working
   4 # with the GCC git repository
   5
   6 ask () {
   7     question=$1
   8     default=$2
   9     var=$3
  10     printf "%s [%s]? " "$question" "$default"
  11     read answer
  12     if [ "x$answer" = "x" ]
  13     then
  14         eval $var=\$default
  15     else
  16         eval $var=\$answer
  17     fi
  18 }
  19
  20 # Add a git command to find the git commit equivalent to legacy SVN revision NNN
  21 git config alias.svn-rev '!f() { rev=$1; shift; git log --all --grep="^From-SVN: r\\?$rev\\b" "${@}"; } ; f'
  22
  23 # Add git commands to convert git commit to monotonically increasing revision number
  24 # and vice versa
  25 git config alias.gcc-descr '!f() { "`git rev-parse --show-toplevel`/contrib/git-descr.sh" $@; } ; f'
  26 git config alias.gcc-undescr '!f() { "`git rev-parse --show-toplevel`/contrib/git-undescr.sh" $@; } ; f'
  27
  28 git config alias.gcc-verify '!f() { "`git rev-parse --show-toplevel`/contrib/gcc-changelog/git_check_commit.py" $@; } ; f'
  29 git config alias.gcc-backport '!f() { "`git rev-parse --show-toplevel`/contrib/git-backport.py" $@; } ; f'
  30 git config alias.gcc-fix-changelog '!f() { "`git rev-parse --show-toplevel`/contrib/git-fix-changelog.py" $@; } ; f'
  31 git config alias.gcc-mklog '!f() { "`git rev-parse --show-toplevel`/contrib/mklog.py" $@; } ; f'
  32 git config alias.gcc-commit-mklog '!f() { "`git rev-parse --show-toplevel`/contrib/git-commit-mklog.py" "$@"; }; f'
  33
  34 # Make diff on MD files use "(define" as a function marker.
  35 # Use this in conjunction with a .gitattributes file containing
  36 # *.md    diff=md
  37 git config diff.md.xfuncname '^\(define.*$'
  38
  39 # Tell git send-email where patches go.
  40 # ??? Maybe also set sendemail.tocmd to guess from MAINTAINERS?
  41 git config sendemail.to 'gcc-patches@gcc.gnu.org'
  42
  43 set_user=$(git config --get "user.name")
  44 set_email=$(git config --get "user.email")
  45
  46 if [ "x$set_user" = "x" ]
  47 then
  48     # Try to guess the user's name by looking it up in the password file
  49     if type getent >/dev/null 2>&1; then
  50       new_user=$(getent passwd $(whoami) | awk -F: '{ print $5 }')
  51     elif [ $(uname -s) = Darwin ]; then
  52       new_user=$(id -F 2>/dev/null)
  53     fi
  54     if [ "x$new_user" = "x" ]
  55     then
  56        new_user="(no default)"
  57     fi
  58 else
  59     new_user=$set_user
  60 fi
  61 ask "Your name" "${new_user}" new_user
  62 if [ "x$new_user" = "x(no default)" ]
  63 then
  64     echo "Cannot continue, git needs to record your name against commits"
  65     exit 1
  66 fi
  67
  68 if [ "x$set_email" = "x" ]
  69 then
  70     new_email="(no_default)"
  71 else
  72     new_email=$set_email
  73 fi
  74
  75 ask "Your email address (for git commits)" "${new_email}" new_email
  76 if [ "x$new_email" = "x(no default)" ]
  77 then
  78     echo "Cannot continue, git needs to record your email address against commits"
  79     exit 1
  80 fi
  81
  82 if [ "x$set_user" != "x$new_user" ]
  83 then
  84     git config "user.name" "$new_user"
  85 fi
  86
  87 if [ "x$set_email" != "x$new_email" ]
  88 then
  89     git config "user.email" "$new_email"
  90 fi
  91
  92 upstream=$(git config --get "gcc-config.upstream")
  93 if [ "x$upstream" = "x" ]
  94 then
  95     upstream="origin"
  96 fi
  97 ask "Local name for upstream repository" "origin" upstream
  98
  99 v=$(git config --get-all "remote.${upstream}.fetch")
 100 if [ "x$v" = "x" ]
 101 then
 102     echo "Remote $upstream does not seem to exist as a remote"
 103     exit 1
 104 fi
 105 git config "gcc-config.upstream" "$upstream"
 106
 107 remote_id=$(git config --get "gcc-config.user")
 108 if [ "x$remote_id" = "x" ]
 109 then
 110     # See if the url specifies the remote user name.
 111     url=$(git config --get "remote.$upstream.url")
 112     if [ "x$url" = "x" ]
 113     then
 114         # This is a pure guess, but for many people it might be OK.
 115         remote_id=$(whoami)
 116     else
 117         remote_id=$(echo $url | sed 's|^.*ssh://\(..*\)@gcc.gnu.org.*$|\1|')
 118         if [ x$remote_id = x$url ]
 119         then
 120             remote_id=$(whoami)
 121         fi
 122     fi
 123 fi
 124
 125 ask "Account name on gcc.gnu.org (for your personal branches area)" "$remote_id" remote_id
 126 git config "gcc-config.user" "$remote_id"
 127
 128 old_pfx=$(git config --get "gcc-config.userpfx")
 129 if [ "x$old_pfx" = "x" ]
 130 then
 131     old_pfx="me"
 132 fi
 133 echo
 134 echo "Local branch prefix for personal branches you want to share"
 135 echo "(local branches starting <prefix>/ can be pushed directly to your"
 136 ask "personal area on the gcc server)" $old_pfx new_pfx
 137 git config "gcc-config.userpfx" "$new_pfx"
 138
 139 echo
 140 ask "Install prepare-commit-msg git hook for 'git commit-mklog' alias" yes dohook
 141 if [ "x$dohook" = xyes ]; then
 142     hookdir=`git rev-parse --git-path hooks 2>/dev/null`
 143     if [ $? -eq 0 ]; then
 144         if [ -f "$hookdir/prepare-commit-msg" ]; then
 145             echo " Moving existing prepare-commit-msg hook to prepare-commit-msg.bak"
 146             mv "$hookdir/prepare-commit-msg" "$hookdir/prepare-commit-msg.bak"
 147         fi
 148         install -c "`git rev-parse --show-toplevel`/contrib/prepare-commit-msg" "$hookdir"
 149     else
 150         echo " `git --version` is too old, cannot find hooks dir"
 151     fi
 152 fi
 153
 154 # Scan the existing settings to see if there are any we need to rewrite.
 155 vendors=$(git config --get-all "remote.${upstream}.fetch" "refs/vendors/" | sed 's:.*refs/vendors/\([^/][^/]*\)/.*:\1:' | sort | uniq)
 156 url=$(git config --get "remote.${upstream}.url")
 157 pushurl=$(git config --get "remote.${upstream}.pushurl")
 158 for v in $vendors
 159 do
 160     echo "Migrating vendor \"$v\" to new remote \"vendors/$v\""
 161     git config --unset-all "remote.${upstream}.fetch" "refs/vendors/$v/"
 162     git config --unset-all "remote.${upstream}.push" "refs/vendors/$v/"
 163     git config "remote.vendors/${v}.url" "${url}"
 164     if [ "x$pushurl" != "x" ]
 165     then
 166         git config "remote.vendors/${v}.pushurl" "${pushurl}"
 167     fi
 168     git config --add "remote.vendors/${v}.fetch" "+refs/vendors/$v/heads/*:refs/remotes/vendors/${v}/*"
 169     git config --add "remote.vendors/${v}.fetch" "+refs/vendors/$v/tags/*:refs/tags/vendors/${v}/*"
 170 done
 171
 172 # Convert the remote 'pfx' to users/pfx to avoid problems with ambiguous refs
 173 # on user branches
 174 old_remote=$(git config --get "remote.${old_pfx}.url")
 175 if [ -n "${old_remote}" ]
 176 then
 177     echo "Migrating remote \"${old_pfx}\" to new remote \"users/${new_pfx}\""
 178     # Create a dummy fetch rule that will cause the subsequent prune to remove the old remote refs.
 179     git config --replace-all "remote.${old_pfx}.fetch" "+refs/empty/*:refs/remotes/${old_pfx}/*"
 180     # Remove any remotes
 181     git remote prune ${old_pfx}
 182     git config --remove-section "remote.${old_pfx}"
 183     for br in $(git branch --list "${old_pfx}/*")
 184     do
 185         old_remote=$(git config --get "branch.${br}.remote")
 186         if [ "${old_remote}" = "${old_pfx}" ]
 187         then
 188             git config "branch.${br}.remote" "users/${new_pfx}"
 189         fi
 190     done
 191 fi
 192
 193 echo "Setting up tracking for personal namespace $remote_id in remotes/users/${new_pfx}"
 194 git config "remote.users/${new_pfx}.url" "${url}"
 195 if [ "x$pushurl" != "x" ]
 196 then
 197     git config "remote.users/${new_pfx}.pushurl" "${pushurl}"
 198 fi
 199 git config --replace-all "remote.users/${new_pfx}.fetch" "+refs/users/${remote_id}/heads/*:refs/remotes/users/${new_pfx}/*" "refs/users/${remote_id}/heads/"
 200 git config --replace-all "remote.users/${new_pfx}.fetch" "+refs/users/${remote_id}/tags/*:refs/tags/users/${new_pfx}/*" "refs/users/${remote_id}/tags/"
 201 git config --replace-all "remote.users/${new_pfx}.push" "refs/heads/${new_pfx}/*:refs/users/${remote_id}/heads/*" "refs/users/${remote_id}"
 202
 203 if [ "$old_pfx" != "$new_pfx" -a "$old_pfx" != "${upstream}" ]
 204 then
 205     git config --remove-section "remote.${old_pfx}"
 206 fi
 207
 208 git config --unset-all "remote.${upstream}.fetch" "refs/users/${remote_id}/"
 209 git config --unset-all "remote.${upstream}.push" "refs/users/${remote_id}/"
 210
 211 git fetch "users/${new_pfx}"