old-git

   1 #!/usr/bin/env bash
   2
   3 #=======================================================================
   4 # old-git
   5 # File ID: 352732aa-2e4d-11e5-bd5f-fefdb24f8e10
   6 #
   7 # Compile and install git(1).
   8 #
   9 # Author: Øyvind A. Holm <sunny@sunbase.org>
  10 # License: GNU General Public License version 2 or later.
  11 #=======================================================================
  12
  13 progname=old-git
  14 VERSION=0.4.0
  15
  16 ARGS="$(getopt -o "\
  17 h\
  18 q\
  19 v\
  20 " -l "\
  21 help,\
  22 no-net,\
  23 quiet,\
  24 verbose,\
  25 version,\
  26 " -n "$progname" -- "$@")"
  27 test "$?" = "0" || exit 1
  28 eval set -- "$ARGS"
  29
  30 opt_help=0
  31 opt_no_net=0
  32 opt_quiet=0
  33 opt_verbose=0
  34 while :; do
  35     case "$1" in
  36         (-h|--help) opt_help=1; shift ;;
  37         (--no-net) opt_no_net=1; shift ;;
  38         (-q|--quiet) opt_quiet=$(($opt_quiet + 1)); shift ;;
  39         (-v|--verbose) opt_verbose=$(($opt_verbose + 1)); shift ;;
  40         (--version) echo $progname $VERSION; exit 0 ;;
  41         (--) shift; break ;;
  42         (*) echo $progname: Internal error >&2; exit 1 ;;
  43     esac
  44 done
  45 opt_verbose=$(($opt_verbose - $opt_quiet))
  46
  47 if test "$opt_help" = "1"; then
  48     test $opt_verbose -gt 0 && { echo; echo $progname $VERSION; }
  49     cat <<END
  50
  51 Compile and install git(1). Default action is to build from the newest
  52 revision on 'master'. Another branch or tag can be specified as first
  53 argument.
  54
  55 Usage: $progname [options] [branch]
  56
  57 Options:
  58
  59   -h, --help
  60     Show this help.
  61   --no-net
  62     Don't fetch or push, use what's present in the local repo.
  63   -q, --quiet
  64     Be more quiet. Can be repeated to increase silence.
  65   -v, --verbose
  66     Increase level of verbosity. Can be repeated.
  67   --version
  68     Print version information.
  69
  70 END
  71     exit 0
  72 fi
  73
  74 lockdir=$HOME/.Build-git.LOCK
  75
  76 myexit() {
  77     rmdir $lockdir || echo $progname: $lockdir: Cannot remove lockdir >&2
  78     exit $1
  79 }
  80
  81 trap "myexit 1" INT TERM
  82 mkdir $lockdir || {
  83     echo $progname: $lockdir: Cannot create lockdir >&2
  84     exit 1
  85 }
  86
  87 rcfile=$HOME/.build-gitrc
  88 origin_url=git://git.kernel.org/pub/scm/git/git.git
  89
  90 # Directory where the git build happens
  91 builddir=$HOME/src/other/git/build-git
  92
  93 # Prefix to directory tree where git will be installed. You can change
  94 # it to for example $HOME/local if you don’t have root access.
  95 pref=/usr/local
  96
  97 # If you don’t have sudo rights or you don’t need it at the location in
  98 # the file system, clear the value of the $sudo variable
  99 sudo=sudo
 100
 101 # Local name of remote master
 102 local_master=master
 103
 104 # Name of remote master
 105 remote_master=origin/master
 106
 107 # Set to 0 to skip ./configure and use Makefile in git.git instead
 108 use_configure=1
 109 configure_opts=
 110
 111 makeflags=
 112 make_doc=1
 113 make_info=1
 114 run_tests=1
 115 hname=$(hostname)
 116
 117 [ -e $rcfile ] && . $rcfile
 118
 119 if [ -n "$1" ]; then
 120     local_master=$1
 121 fi
 122
 123 is_official_branch() {
 124     echo -n $1 | grep -Eq '^(master|maint|next|pu|todo)$' &&
 125         return 0 || return 1
 126 }
 127
 128 fetch_remotes() {
 129     git remote | grep -q '^origin$' || git remote add origin $origin_url
 130     git remote | grep -q '^kernelorg$' ||
 131         git remote add kernelorg git://git.kernel.org/pub/scm/git/git.git
 132     git remote | grep -q '^gitster$' || {
 133         git remote add gitster git://github.com/gitster/git.git
 134         git config --add remote.gitster.fetch +refs/notes/*:refs/notes/*
 135     }
 136     git remote | grep -q '^gitlab$' ||
 137         git remote add gitlab git@gitlab.com:oyvholm/git.git
 138     git remote | grep -q '^peff$' ||
 139         git remote add peff git://github.com/peff/git.git
 140     git remote | grep -q '^sunbase$' ||
 141         git remote add sunbase \
 142             sunny@sunbase.org:/home/sunny/repos/Git-other/git.git
 143     if test "$opt_no_net" = "0"; then
 144         echo ================= git fetch =================
 145         echo ===== origin =====
 146         until git fetch origin; do
 147             echo $progname: Fetch error from origin, retrying >&2
 148             sleep 2
 149         done
 150         # git fetch --all arrived in v1.6.6, and that’s too recent to use.
 151         for f in $(git remote | grep -v '^origin$'); do
 152             echo ===== $f =====
 153             git fetch $f
 154         done
 155         for f in maint master next pu todo; do
 156             git branch | cut -c 3- | grep -q ^$f\$ || git branch $f origin/$f
 157         done
 158     fi
 159 }
 160
 161 commit_tree() {
 162     git log --color --graph --pretty=format:'%Cred%h %Cblue%p%Creset '\
 163 '-%C(yellow)%d%Creset %s %Cgreen(%cd %Cblue%an%Cgreen)%Creset' \
 164     --abbrev-commit $1
 165 }
 166
 167 enable_sudo() {
 168     until $sudo echo Password OK | grep -q "Password OK"; do
 169         :
 170     done
 171 }
 172
 173 push_changes() {
 174     if test "$opt_no_net" = "0"; then
 175         for f in bellmann loc-repo passp sunbase gitlab rsync-net; do
 176             git remote | grep -q "^$f\$" && {
 177                 echo ==== push changes to $f ====
 178             }
 179         done
 180         for f in loc-repo passp sunbase rsync-net; do
 181             git remote | grep -q "^$f\$" && {
 182                 echo ==== push tags to $f ====
 183             }
 184         done
 185         echo ==== push finished ====
 186     fi
 187     lpar_git
 188 }
 189
 190 print_timestamp() {
 191     date +"%Y-%m-%d %H:%M:%S%z"
 192 }
 193
 194 update_branches() {
 195     :
 196 }
 197
 198 lpar_git() {
 199     :
 200 }
 201
 202 [ -z "`git --version | grep '^git version '`" ] && {
 203     echo $progname: You need to have git installed to use this script. >&2
 204     myexit 1
 205 }
 206
 207 rmdir $builddir 2>/dev/null
 208 if [ ! -d $builddir/. ]; then
 209     mkdir -p $builddir || {
 210         echo $progname: $builddir: Cannot create directory
 211         myexit 1
 212     }
 213     rmdir $builddir
 214     echo ================= git clone =================
 215     git clone $origin_url $builddir
 216     cd $builddir || { echo $progname: $builddir: Cannot chdir >&2; myexit 1; }
 217     git config lpar.name git
 218     for f in maint next pu todo; do
 219         git branch -t $f origin/$f || {
 220             echo $progname: $f: Could not create branch >&2
 221             myexit 1
 222         }
 223     done
 224 fi
 225 cd $builddir || { echo $progname: $builddir: Cannot chdir >&2; myexit 1; }
 226 GIT_PAGER=cat git status --porcelain | grep . && {
 227     echo $progname: $builddir is not clean, aborting >&2
 228     myexit 1
 229 }
 230 curr_git_ver=$(
 231     cd $builddir &&
 232         (git tag | grep compiled-$hname-2 | tail -1) || echo UNKNOWN
 233 )
 234 lpar_git
 235
 236 echo
 237 echo Variables:
 238 echo
 239 echo "curr_git_ver   = \"$curr_git_ver\" ($(
 240     cd $builddir
 241     git describe --long --match 'v[12]*' $curr_git_ver
 242 ))"
 243 echo "rcfile         = \"$rcfile\" ($([ -e $rcfile ] || echo -n "not ")found)"
 244 echo "builddir       = \"$builddir\""
 245 echo "pref           = \"$pref\""
 246 echo "sudo           = \"$sudo\""
 247 echo "local_master   = \"$local_master\""
 248 echo "remote_master  = \"$remote_master\""
 249 echo "makeflags      = \"$makeflags\""
 250 echo "make_doc       = \"$make_doc\""
 251 echo "make_info      = \"$make_info\""
 252 echo "hname          = \"$hname\""
 253 echo "use_configure  = \"$use_configure\""
 254 echo "configure_opts = \"$configure_opts\""
 255 echo
 256
 257 git checkout $local_master || { echo Cannot check out branch >&2; myexit 1; }
 258 if [ ! -e GIT-VERSION-GEN ]; then
 259     # Paranoia check
 260     echo $progname: Didn’t find GIT-VERSION-GEN. That’s strange, aborting.
 261     myexit 1
 262 fi
 263 is_official_branch $local_master &&
 264     destbranch=origin/$local_master || destbranch=$local_master
 265 echo
 266 if [ -n "$curr_git_ver" ]; then
 267     echo ================= git status in `pwd` =================
 268     GIT_PAGER=cat git status
 269     echo
 270     print_timestamp
 271     unset choice
 272     until [ "$choice" = "y" ]; do
 273         echo
 274         unset choice
 275         echo $(git log --format=oneline $curr_git_ver..$destbranch | wc -l) \
 276             "new commits available in range $curr_git_ver..$destbranch"
 277         echo Going to compile git $(
 278             git describe --long --match 'v[12]*' $destbranch
 279         )
 280         echo
 281         echo If that looks okay to you, press \'y\' to start the build, or:
 282         echo \'d\' to diff
 283         echo \'ds\' to diff --stat
 284         echo \'dw\' to word-diff
 285         echo \'l\' to list log
 286         echo \'lp\' to list log with patch
 287         echo \'lt\' to list log with commit tree
 288         echo \'lw\' to list log with patch using word diff
 289         echo \'n\' to abort
 290         echo \'p\' to push new commits
 291         echo \'t\' to show commit tree
 292         read choice
 293         [ "$choice" = "d" ] && git diff $curr_git_ver $destbranch
 294         [ "$choice" = "ds" ] && git diff --stat $curr_git_ver $destbranch
 295         [ "$choice" = "dw" ] && git diff --word-diff $curr_git_ver $destbranch
 296         [ "$choice" = "l" ] && git log --stat $curr_git_ver..$destbranch
 297         [ "$choice" = "lp" ] && git log --patch $curr_git_ver..$destbranch
 298         [ "$choice" = "lt" ] &&
 299             git log --graph --stat $curr_git_ver..$destbranch
 300         [ "$choice" = "lw" ] &&
 301             git log --patch --word-diff $curr_git_ver..$destbranch
 302         [ "$choice" = "n" ] && myexit 0
 303         [ "$choice" = "p" ] && {
 304             if test "$opt_no_net" = "0"; then
 305                 update_branches
 306                 push_changes
 307             else
 308                 echo $progname: --no-net was specified, will not push >&2
 309             fi
 310         }
 311         [ "$choice" = "t" ] && commit_tree $curr_git_ver..$destbranch
 312     done
 313 else
 314     unset choice
 315     until [ "$choice" = "y" ]; do
 316         echo -n Press \'y\' to start the build, or \'n\' to abort...
 317         read choice
 318         [ "$choice" = "n" ] && myexit 0
 319     done
 320 fi
 321
 322 echo ================= git clean =================
 323 git clean -fxd
 324 echo ================= Update all branches =================
 325 update_branches
 326 vername=git.$local_master.`git describe --long --match 'v[12]*'`
 327 dest=$pref/varprg/$vername
 328 [ -d $dest/. ] && {
 329     echo
 330     echo "Sorry, no new git(1) for you this time."
 331     echo You’ll have to stick with `git --version` for now.
 332     push_changes
 333     myexit 0
 334 }
 335 push_changes
 336 if [ "$use_configure" = "1" ]; then
 337     echo $progname: Creating ./configure
 338     make configure
 339     echo ==== ./configure --prefix=$dest $configure_opts
 340     ./configure --prefix=$dest $configure_opts
 341 fi
 342 if [ "$make_doc" = "1" ]; then
 343     make_doc_str=doc
 344     inst_doc_str="install-doc install-html"
 345 else
 346     make_doc_str=
 347     inst_doc_str=
 348 fi
 349 if [ "$make_info" = "1" ]; then
 350     make_info_str=info
 351     inst_info_str=install-info
 352 else
 353     make_info_str=
 354     inst_info_str=
 355 fi
 356 unset make_doc_str make_info_str inst_doc_str inst_info_str run_tests
 357 echo Compiling $vername
 358 echo "==== make prefix=$dest $makeflags all" \
 359     "$make_doc_str $make_info_str \|\| myexit"
 360 make prefix=$dest $makeflags all $make_doc_str $make_info_str || myexit
 361 if test "$run_tests" = "1"; then
 362     echo ==== make $makeflags test
 363     make $makeflags test
 364 fi
 365 echo
 366 echo Ready to install $(./git --version) from branch \"$local_master\"
 367 unset choice
 368 until test "$choice" = "y"; do
 369     echo
 370     print_timestamp
 371     echo -n If all tests succeeded, press y to continue...
 372     read choice
 373 done
 374 enable_sudo
 375 echo "==== $sudo make prefix=$dest" \
 376     "$makeflags install $inst_doc_str $inst_info_str"
 377 $sudo make prefix=$dest $makeflags install $inst_doc_str $inst_info_str
 378 echo ================= make install finished =================
 379 myexit 0