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     echo -n $question "["$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() { if test \${1:-no} = --full; then c=\${2:-master}; r=\$(git describe --all --abbrev=40 --match 'basepoints/gcc-[0-9]*' \$c | sed -n 's,^\\(tags/\\)\\?basepoints/gcc-,r,p'); expr match \${r:-no} '^r[0-9]\\+\$' >/dev/null && r=\${r}-0-g\$(git rev-parse \${2:-master}); else c=\${1:-master}; r=\$(git describe --all --match 'basepoints/gcc-[0-9]*' \$c | sed -n 's,^\\(tags/\\)\\?basepoints/gcc-\\([0-9]\\+\\)-\\([0-9]\\+\\)-g[0-9a-f]*\$,r\\2-\\3,p;s,^\\(tags/\\)\\?basepoints/gcc-\\([0-9]\\+\\)\$,r\\2-0,p'); fi; if test -n \$r; then o=\$(git config --get gcc-config.upstream); rr=\$(echo \$r | sed -n 's,^r\\([0-9]\\+\\)-[0-9]\\+\\(-g[0-9a-f]\\+\\)\\?\$,\\1,p'); if git rev-parse --verify --quiet \${o:-origin}/releases/gcc-\$rr >/dev/null; then m=releases/gcc-\$rr; else m=master; fi; git merge-base --is-ancestor \$c \${o:-origin}/\$m && \echo \${r}; fi; }; f"
  26 git config alias.gcc-undescr \!"f() { o=\$(git config --get gcc-config.upstream); r=\$(echo \$1 | sed -n 's,^r\\([0-9]\\+\\)-[0-9]\\+\$,\\1,p'); n=\$(echo \$1 | sed -n 's,^r[0-9]\\+-\\([0-9]\\+\\)\$,\\1,p'); test -z \$r && echo Invalid id \$1 && exit 1; h=\$(git rev-parse --verify --quiet \${o:-origin}/releases/gcc-\$r); test -z \$h && h=\$(git rev-parse --verify --quiet \${o:-origin}/master); p=\$(git describe --all --match 'basepoints/gcc-'\$r \$h | sed -n 's,^\\(tags/\\)\\?basepoints/gcc-[0-9]\\+-\\([0-9]\\+\\)-g[0-9a-f]*\$,\\2,p;s,^\\(tags/\\)\\?basepoints/gcc-[0-9]\\+\$,0,p'); git rev-parse --verify \$h~\$(expr \$p - \$n); }; 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-mklog '!f() { "`git rev-parse --show-toplevel`/contrib/mklog.py" $@; } ; f'
  31 git config alias.gcc-commit-mklog '!f() { GCC_FORCE_MKLOG=1 git commit "$@"; }; f'
  32
  33 # Make diff on MD files use "(define" as a function marker.
  34 # Use this in conjunction with a .gitattributes file containing
  35 # *.md    diff=md
  36 git config diff.md.xfuncname '^\(define.*$'
  37
  38 set_user=$(git config --get "user.name")
  39 set_email=$(git config --get "user.email")
  40
  41 if [ "x$set_user" = "x" ]
  42 then
  43     # Try to guess the user's name by looking it up in the password file
  44     new_user=$(getent passwd $(whoami) | awk -F: '{ print $5 }')
  45     if [ "x$new_user" = "x" ]
  46     then
  47        new_user="(no default)"
  48     fi
  49 else
  50     new_user=$set_user
  51 fi
  52 ask "Your name" "${new_user}" new_user
  53 if [ "x$new_user" = "x(no default)" ]
  54 then
  55     echo "Cannot continue, git needs to record your name against commits"
  56     exit 1
  57 fi
  58
  59 if [ "x$set_email" = "x" ]
  60 then
  61     new_email="(no_default)"
  62 else
  63     new_email=$set_email
  64 fi
  65
  66 ask "Your email address (for git commits)" "${new_email}" new_email
  67 if [ "x$new_email" = "x(no default)" ]
  68 then
  69     echo "Cannot continue, git needs to record your email address against commits"
  70     exit 1
  71 fi
  72
  73 if [ "x$set_user" != "x$new_user" ]
  74 then
  75     git config "user.name" "$new_user"
  76 fi
  77
  78 if [ "x$set_email" != "x$new_email" ]
  79 then
  80     git config "user.email" "$new_email"
  81 fi
  82
  83 upstream=$(git config --get "gcc-config.upstream")
  84 if [ "x$upstream" = "x" ]
  85 then
  86     upstream="origin"
  87 fi
  88 ask "Local name for upstream repository" "origin" upstream
  89
  90 v=$(git config --get-all "remote.${upstream}.fetch")
  91 if [ "x$v" = "x" ]
  92 then
  93     echo "Remote $upstream does not seem to exist as a remote"
  94     exit 1
  95 fi
  96 git config "gcc-config.upstream" "$upstream"
  97
  98 remote_id=$(git config --get "gcc-config.user")
  99 if [ "x$remote_id" = "x" ]
 100 then
 101     # See if the url specifies the remote user name.
 102     url=$(git config --get "remote.$upstream.url")
 103     if [ "x$url" = "x" ]
 104     then
 105         # This is a pure guess, but for many people it might be OK.
 106         remote_id=$(whoami)
 107     else
 108         remote_id=$(echo $url | sed -r "s|^.*ssh://(.+)@gcc.gnu.org.*$|\1|")
 109         if [ x$remote_id = x$url ]
 110         then
 111             remote_id=$(whoami)
 112         fi
 113     fi
 114 fi
 115
 116 ask "Account name on gcc.gnu.org (for your personal branches area)" $remote_id remote_id
 117 git config "gcc-config.user" "$remote_id"
 118
 119 old_pfx=$(git config --get "gcc-config.userpfx")
 120 if [ "x$old_pfx" = "x" ]
 121 then
 122     old_pfx="me"
 123 fi
 124 echo
 125 echo "Local branch prefix for personal branches you want to share"
 126 echo "(local branches starting <prefix>/ can be pushed directly to your"
 127 ask "personal area on the gcc server)" $old_pfx new_pfx
 128 git config "gcc-config.userpfx" "$new_pfx"
 129
 130 echo
 131 ask "Install prepare-commit-msg git hook for 'git commit-mklog' alias" yes dohook
 132 if [ "x$dohook" = xyes ]; then
 133     hookdir=`git rev-parse --git-path hooks`
 134     if [ -f "$hookdir/prepare-commit-msg" ]; then
 135         echo " Moving existing prepare-commit-msg hook to prepare-commit-msg.bak"
 136         mv "$hookdir/prepare-commit-msg" "$hookdir/prepare-commit-msg.bak"
 137     fi
 138     install -c "`git rev-parse --show-toplevel`/contrib/prepare-commit-msg" "$hookdir"
 139 fi
 140
 141 # Scan the existing settings to see if there are any we need to rewrite.
 142 vendors=$(git config --get-all "remote.${upstream}.fetch" "refs/vendors/" | sed -r "s:.*refs/vendors/([^/]+)/.*:\1:" | sort | uniq)
 143 url=$(git config --get "remote.${upstream}.url")
 144 pushurl=$(git config --get "remote.${upstream}.pushurl")
 145 for v in $vendors
 146 do
 147     echo "Migrating vendor \"$v\" to new remote \"vendors/$v\""
 148     git config --unset-all "remote.${upstream}.fetch" "refs/vendors/$v/"
 149     git config --unset-all "remote.${upstream}.push" "refs/vendors/$v/"
 150     git config "remote.vendors/${v}.url" "${url}"
 151     if [ "x$pushurl" != "x" ]
 152     then
 153         git config "remote.vendors/${v}.pushurl" "${pushurl}"
 154     fi
 155     git config --add "remote.vendors/${v}.fetch" "+refs/vendors/$v/heads/*:refs/remotes/vendors/${v}/*"
 156     git config --add "remote.vendors/${v}.fetch" "+refs/vendors/$v/tags/*:refs/tags/vendors/${v}/*"
 157 done
 158
 159 # Convert the remote 'pfx' to users/pfx to avoid problems with ambiguous refs
 160 # on user branches
 161 old_remote=$(git config --get "remote.${old_pfx}.url")
 162 if [ -n "${old_remote}" ]
 163 then
 164     echo "Migrating remote \"${old_pfx}\" to new remote \"users/${new_pfx}\""
 165     # Create a dummy fetch rule that will cause the subsequent prune to remove the old remote refs.
 166     git config --replace-all "remote.${old_pfx}.fetch" "+refs/empty/*:refs/remotes/${old_pfx}/*"
 167     # Remove any remotes
 168     git remote prune ${old_pfx}
 169     git config --remove-section "remote.${old_pfx}"
 170     for br in $(git branch --list "${old_pfx}/*")
 171     do
 172         old_remote=$(git config --get "branch.${br}.remote")
 173         if [ "${old_remote}" = "${old_pfx}" ]
 174         then
 175             git config "branch.${br}.remote" "users/${new_pfx}"
 176         fi
 177     done
 178 fi
 179
 180 echo "Setting up tracking for personal namespace $remote_id in remotes/users/${new_pfx}"
 181 git config "remote.users/${new_pfx}.url" "${url}"
 182 if [ "x$pushurl" != "x" ]
 183 then
 184     git config "remote.users/${new_pfx}.pushurl" "${pushurl}"
 185 fi
 186 git config --replace-all "remote.users/${new_pfx}.fetch" "+refs/users/${remote_id}/heads/*:refs/remotes/users/${new_pfx}/*" "refs/users/${remote_id}/heads/"
 187 git config --replace-all "remote.users/${new_pfx}.fetch" "+refs/users/${remote_id}/tags/*:refs/tags/users/${new_pfx}/*" "refs/users/${remote_id}/tags/"
 188 git config --replace-all "remote.users/${new_pfx}.push" "refs/heads/${new_pfx}/*:refs/users/${remote_id}/heads/*" "refs/users/${remote_id}"
 189
 190 if [ "$old_pfx" != "$new_pfx" -a "$old_pfx" != "${upstream}" ]
 191 then
 192     git config --remove-section "remote.${old_pfx}"
 193 fi
 194
 195 git config --unset-all "remote.${upstream}.fetch" "refs/users/${remote_id}/"
 196 git config --unset-all "remote.${upstream}.push" "refs/users/${remote_id}/"
 197
 198 git fetch "users/${new_pfx}"