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() { rev=$1; git cherry-pick -x $@; } ; f'
  30
  31 git config alias.gcc-mklog '!f() { "`git rev-parse --show-toplevel`/contrib/mklog.py" $@; } ; f'
  32
  33 git config alias.commit-mklog '!f() { GCC_FORCE_MKLOG=1 git commit "$@"; }; f'
  34
  35 # Make diff on MD files use "(define" as a function marker.
  36 # Use this in conjunction with a .gitattributes file containing
  37 # *.md    diff=md
  38 git config diff.md.xfuncname '^\(define.*$'
  39
  40 set_user=$(git config --get "user.name")
  41 set_email=$(git config --get "user.email")
  42
  43 if [ "x$set_user" = "x" ]
  44 then
  45     # Try to guess the user's name by looking it up in the password file
  46     new_user=$(getent passwd $(whoami) | awk -F: '{ print $5 }')
  47     if [ "x$new_user" = "x" ]
  48     then
  49        new_user="(no default)"
  50     fi
  51 else
  52     new_user=$set_user
  53 fi
  54 ask "Your name" "${new_user}" new_user
  55 if [ "x$new_user" = "x(no default)" ]
  56 then
  57     echo "Cannot continue, git needs to record your name against commits"
  58     exit 1
  59 fi
  60
  61 if [ "x$set_email" = "x" ]
  62 then
  63     new_email="(no_default)"
  64 else
  65     new_email=$set_email
  66 fi
  67
  68 ask "Your email address (for git commits)" "${new_email}" new_email
  69 if [ "x$new_email" = "x(no default)" ]
  70 then
  71     echo "Cannot continue, git needs to record your email address against commits"
  72     exit 1
  73 fi
  74
  75 if [ "x$set_user" != "x$new_user" ]
  76 then
  77     git config "user.name" "$new_user"
  78 fi
  79
  80 if [ "x$set_email" != "x$new_email" ]
  81 then
  82     git config "user.email" "$new_email"
  83 fi
  84
  85 upstream=$(git config --get "gcc-config.upstream")
  86 if [ "x$upstream" = "x" ]
  87 then
  88     upstream="origin"
  89 fi
  90 ask "Local name for upstream repository" "origin" upstream
  91
  92 v=$(git config --get-all "remote.${upstream}.fetch")
  93 if [ "x$v" = "x" ]
  94 then
  95     echo "Remote $upstream does not seem to exist as a remote"
  96     exit 1
  97 fi
  98 git config "gcc-config.upstream" "$upstream"
  99
 100 remote_id=$(git config --get "gcc-config.user")
 101 if [ "x$remote_id" = "x" ]
 102 then
 103     # See if the url specifies the remote user name.
 104     url=$(git config --get "remote.$upstream.url")
 105     if [ "x$url" = "x" ]
 106     then
 107         # This is a pure guess, but for many people it might be OK.
 108         remote_id=$(whoami)
 109     else
 110         remote_id=$(echo $url | sed -r "s|^.*ssh://(.+)@gcc.gnu.org.*$|\1|")
 111         if [ x$remote_id = x$url ]
 112         then
 113             remote_id=$(whoami)
 114         fi
 115     fi
 116 fi
 117
 118 ask "Account name on gcc.gnu.org (for your personal branches area)" $remote_id remote_id
 119 git config "gcc-config.user" "$remote_id"
 120
 121 old_pfx=$(git config --get "gcc-config.userpfx")
 122 if [ "x$old_pfx" = "x" ]
 123 then
 124     old_pfx="me"
 125 fi
 126 echo
 127 echo "Local branch prefix for personal branches you want to share"
 128 echo "(local branches starting <prefix>/ can be pushed directly to your"
 129 ask "personal area on the gcc server)" $old_pfx new_pfx
 130 git config "gcc-config.userpfx" "$new_pfx"
 131
 132 echo
 133 ask "Install prepare-commit-msg git hook for 'git commit-mklog' alias" yes dohook
 134 if [ "x$dohook" = xyes ]; then
 135     hookdir=`git rev-parse --git-path hooks`
 136     if [ -f "$hookdir/prepare-commit-msg" ]; then
 137         echo " Moving existing prepare-commit-msg hook to prepare-commit-msg.bak"
 138         mv "$hookdir/prepare-commit-msg" "$hookdir/prepare-commit-msg.bak"
 139     fi
 140     install -c "`git rev-parse --show-toplevel`/contrib/prepare-commit-msg" "$hookdir"
 141 fi
 142
 143 # Scan the existing settings to see if there are any we need to rewrite.
 144 vendors=$(git config --get-all "remote.${upstream}.fetch" "refs/vendors/" | sed -r "s:.*refs/vendors/([^/]+)/.*:\1:" | sort | uniq)
 145 url=$(git config --get "remote.${upstream}.url")
 146 pushurl=$(git config --get "remote.${upstream}.pushurl")
 147 for v in $vendors
 148 do
 149     echo "Migrating vendor \"$v\" to new remote \"vendors/$v\""
 150     git config --unset-all "remote.${upstream}.fetch" "refs/vendors/$v/"
 151     git config --unset-all "remote.${upstream}.push" "refs/vendors/$v/"
 152     git config "remote.vendors/${v}.url" "${url}"
 153     if [ "x$pushurl" != "x" ]
 154     then
 155         git config "remote.vendors/${v}.pushurl" "${pushurl}"
 156     fi
 157     git config --add "remote.vendors/${v}.fetch" "+refs/vendors/$v/heads/*:refs/remotes/vendors/${v}/*"
 158     git config --add "remote.vendors/${v}.fetch" "+refs/vendors/$v/tags/*:refs/tags/vendors/${v}/*"
 159 done
 160
 161 # Convert the remote 'pfx' to users/pfx to avoid problems with ambiguous refs
 162 # on user branches
 163 old_remote=$(git config --get "remote.${old_pfx}.url")
 164 if [ -n "${old_remote}" ]
 165 then
 166     echo "Migrating remote \"${old_pfx}\" to new remote \"users/${new_pfx}\""
 167     # Create a dummy fetch rule that will cause the subsequent prune to remove the old remote refs.
 168     git config --replace-all "remote.${old_pfx}.fetch" "+refs/empty/*:refs/remotes/${old_pfx}/*"
 169     # Remove any remotes
 170     git remote prune ${old_pfx}
 171     git config --remove-section "remote.${old_pfx}"
 172     for br in $(git branch --list "${old_pfx}/*")
 173     do
 174         old_remote=$(git config --get "branch.${br}.remote")
 175         if [ "${old_remote}" = "${old_pfx}" ]
 176         then
 177             git config "branch.${br}.remote" "users/${new_pfx}"
 178         fi
 179     done
 180 fi
 181
 182 echo "Setting up tracking for personal namespace $remote_id in remotes/users/${new_pfx}"
 183 git config "remote.users/${new_pfx}.url" "${url}"
 184 if [ "x$pushurl" != "x" ]
 185 then
 186     git config "remote.users/${new_pfx}.pushurl" "${pushurl}"
 187 fi
 188 git config --replace-all "remote.users/${new_pfx}.fetch" "+refs/users/${remote_id}/heads/*:refs/remotes/users/${new_pfx}/*" "refs/users/${remote_id}/heads/"
 189 git config --replace-all "remote.users/${new_pfx}.fetch" "+refs/users/${remote_id}/tags/*:refs/tags/users/${new_pfx}/*" "refs/users/${remote_id}/tags/"
 190 git config --replace-all "remote.users/${new_pfx}.push" "refs/heads/${new_pfx}/*:refs/users/${remote_id}/heads/*" "refs/users/${remote_id}"
 191
 192 if [ "$old_pfx" != "$new_pfx" -a "$old_pfx" != "${upstream}" ]
 193 then
 194     git config --remove-section "remote.${old_pfx}"
 195 fi
 196
 197 git config --unset-all "remote.${upstream}.fetch" "refs/users/${remote_id}/"
 198 git config --unset-all "remote.${upstream}.push" "refs/users/${remote_id}/"
 199
 200 git fetch "users/${new_pfx}"