build-git

   1 #!/usr/bin/env bash
   2
   3 #=======================================================================
   4 # build-git
   5 # File ID: 7075da30-98d2-11de-b3de-00248cd5cf1e
   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=build-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                 git push -f $f master maint next pu todo
 179             }
 180         done
 181         for f in loc-repo passp sunbase rsync-net; do
 182             git remote | grep -q "^$f\$" && {
 183                 echo ==== push tags to $f ====
 184                 git push --tags $f
 185             }
 186         done
 187         echo ==== push finished ====
 188     fi
 189     lpar_git
 190 }
 191
 192 print_timestamp() {
 193     date +"%Y-%m-%d %H:%M:%S%z"
 194 }
 195
 196 update_branches() {
 197     git checkout $(git log -1 --format=%H) 2>/dev/null
 198     echo -n "master: " >&2
 199     git push . origin/master:master || {
 200         echo $progname: master branch did not fast-forward, aborting >&2
 201         git checkout -
 202         myexit 1
 203     }
 204     for f in maint next pu todo; do
 205         echo -n "$f: " >&2
 206         git push -f . origin/$f:$f
 207     done
 208     git checkout -f $local_master
 209 }
 210
 211 lpar_git() {
 212     [ -f $HOME/src/git/lpar/git.lpar ] && lpar
 213 }
 214
 215 [ -z "`git --version | grep '^git version '`" ] && {
 216     echo $progname: You need to have git installed to use this script. >&2
 217     myexit 1
 218 }
 219
 220 rmdir $builddir 2>/dev/null
 221 if [ ! -d $builddir/. ]; then
 222     mkdir -p $builddir || {
 223         echo $progname: $builddir: Cannot create directory
 224         myexit 1
 225     }
 226     rmdir $builddir
 227     echo ================= git clone =================
 228     git clone $origin_url $builddir
 229     cd $builddir || { echo $progname: $builddir: Cannot chdir >&2; myexit 1; }
 230     git config lpar.name git
 231     for f in maint next pu todo; do
 232         git branch -t $f origin/$f || {
 233             echo $progname: $f: Could not create branch >&2
 234             myexit 1
 235         }
 236     done
 237 fi
 238 cd $builddir || { echo $progname: $builddir: Cannot chdir >&2; myexit 1; }
 239 GIT_PAGER=cat git status --porcelain | grep . && {
 240     echo $progname: $builddir is not clean, aborting >&2
 241     myexit 1
 242 }
 243 curr_git_ver=$(
 244     cd $builddir &&
 245         (git tag | grep compiled-$hname-2 | tail -1) || echo UNKNOWN
 246 )
 247 lpar_git
 248
 249 echo
 250 echo Variables:
 251 echo
 252 echo "curr_git_ver   = \"$curr_git_ver\" ($(
 253     cd $builddir
 254     git describe --long --match 'v[12]*' $curr_git_ver
 255 ))"
 256 echo "rcfile         = \"$rcfile\" ($([ -e $rcfile ] || echo -n "not ")found)"
 257 echo "builddir       = \"$builddir\""
 258 echo "pref           = \"$pref\""
 259 echo "sudo           = \"$sudo\""
 260 echo "local_master   = \"$local_master\""
 261 echo "remote_master  = \"$remote_master\""
 262 echo "makeflags      = \"$makeflags\""
 263 echo "make_doc       = \"$make_doc\""
 264 echo "make_info      = \"$make_info\""
 265 echo "hname          = \"$hname\""
 266 echo "use_configure  = \"$use_configure\""
 267 echo "configure_opts = \"$configure_opts\""
 268 echo
 269
 270 git checkout $local_master || { echo Cannot check out branch >&2; myexit 1; }
 271 if [ ! -e GIT-VERSION-GEN ]; then
 272     # Paranoia check
 273     echo $progname: Didn’t find GIT-VERSION-GEN. That’s strange, aborting.
 274     myexit 1
 275 fi
 276 fetch_remotes
 277 is_official_branch $local_master &&
 278     destbranch=origin/$local_master || destbranch=$local_master
 279 echo
 280 if [ -n "$curr_git_ver" ]; then
 281     echo ================= git status in `pwd` =================
 282     GIT_PAGER=cat git status
 283     echo
 284     print_timestamp
 285     unset choice
 286     until [ "$choice" = "y" ]; do
 287         echo
 288         unset choice
 289         echo $(git log --format=oneline $curr_git_ver..$destbranch | wc -l) \
 290             "new commits available in range $curr_git_ver..$destbranch"
 291         echo Going to compile git $(
 292             git describe --long --match 'v[12]*' $destbranch
 293         )
 294         echo
 295         echo If that looks okay to you, press \'y\' to start the build, or:
 296         echo \'d\' to diff
 297         echo \'ds\' to diff --stat
 298         echo \'dw\' to word-diff
 299         echo \'l\' to list log
 300         echo \'lp\' to list log with patch
 301         echo \'lt\' to list log with commit tree
 302         echo \'lw\' to list log with patch using word diff
 303         echo \'n\' to abort
 304         echo \'p\' to push new commits
 305         echo \'t\' to show commit tree
 306         read choice
 307         [ "$choice" = "d" ] && git diff $curr_git_ver $destbranch
 308         [ "$choice" = "ds" ] && git diff --stat $curr_git_ver $destbranch
 309         [ "$choice" = "dw" ] && git diff --word-diff $curr_git_ver $destbranch
 310         [ "$choice" = "l" ] && git log --stat $curr_git_ver..$destbranch
 311         [ "$choice" = "lp" ] && git log --patch $curr_git_ver..$destbranch
 312         [ "$choice" = "lt" ] &&
 313             git log --graph --stat $curr_git_ver..$destbranch
 314         [ "$choice" = "lw" ] &&
 315             git log --patch --word-diff $curr_git_ver..$destbranch
 316         [ "$choice" = "n" ] && myexit 0
 317         [ "$choice" = "p" ] && {
 318             if test "$opt_no_net" = "0"; then
 319                 update_branches
 320                 push_changes
 321             else
 322                 echo $progname: --no-net was specified, will not push >&2
 323             fi
 324         }
 325         [ "$choice" = "t" ] && commit_tree $curr_git_ver..$destbranch
 326     done
 327 else
 328     unset choice
 329     until [ "$choice" = "y" ]; do
 330         echo -n Press \'y\' to start the build, or \'n\' to abort...
 331         read choice
 332         [ "$choice" = "n" ] && myexit 0
 333     done
 334 fi
 335
 336 echo ================= git clean =================
 337 git clean -fxd
 338 echo ================= Update all branches =================
 339 update_branches
 340 vername=git.$local_master.`git describe --long --match 'v[12]*'`
 341 dest=$pref/varprg/$vername
 342 [ -d $dest/. ] && {
 343     echo
 344     echo "Sorry, no new git(1) for you this time."
 345     echo You’ll have to stick with `git --version` for now.
 346     push_changes
 347     myexit 0
 348 }
 349 push_changes
 350 if [ "$use_configure" = "1" ]; then
 351     echo $progname: Creating ./configure
 352     make configure
 353     echo ==== ./configure --prefix=$dest $configure_opts
 354     ./configure --prefix=$dest $configure_opts
 355 fi
 356 if [ "$make_doc" = "1" ]; then
 357     make_doc_str=doc
 358     inst_doc_str="install-doc install-html"
 359 else
 360     make_doc_str=
 361     inst_doc_str=
 362 fi
 363 if [ "$make_info" = "1" ]; then
 364     make_info_str=info
 365     inst_info_str=install-info
 366 else
 367     make_info_str=
 368     inst_info_str=
 369 fi
 370 echo Compiling $vername
 371 echo "==== make prefix=$dest $makeflags all" \
 372     "$make_doc_str $make_info_str \|\| myexit"
 373 make prefix=$dest $makeflags all $make_doc_str $make_info_str || myexit
 374 if test "$run_tests" = "1"; then
 375     echo ==== make $makeflags test
 376     make $makeflags test
 377 fi
 378 echo
 379 echo Ready to install $(./git --version) from branch \"$local_master\"
 380 unset choice
 381 until test "$choice" = "y"; do
 382     echo
 383     print_timestamp
 384     echo -n If all tests succeeded, press y to continue...
 385     read choice
 386 done
 387 enable_sudo
 388 echo "==== $sudo make prefix=$dest" \
 389     "$makeflags install $inst_doc_str $inst_info_str"
 390 $sudo make prefix=$dest $makeflags install $inst_doc_str $inst_info_str
 391 echo ================= make install finished =================
 392 $sudo mkdir -p $pref/{bin,prg,varprg}
 393 $sudo rm $pref/prg/git
 394 $sudo ln -svf ../varprg/$vername $pref/prg/git
 395 $sudo ln -sv /etc $pref/prg/git/etc
 396 cd $pref/bin || {
 397     echo $progname: $pref/bin: Cannot chdir, aborting >&2
 398     myexit 1
 399 }
 400 $sudo ln -svf ../prg/git/bin/* .
 401 echo ================= Check that the thing works =================
 402 hash -r
 403 localgit=`./git --version`
 404 globalgit=`git --version`
 405 if [ "$localgit" = "$globalgit" ]; then
 406     echo Congratulations with your shiny new $globalgit
 407     cd $builddir || { echo $progname: $builddir: Cannot chdir >&2; myexit 1; }
 408     git tag compiled-$hname-$(date -u +"%Y%m%dT%H%M%SZ")
 409     test "$opt_no_net" = "0" && git push --tags sunbase
 410 else
 411     echo Uhm, something went wrong.
 412     echo Current version of git : $globalgit
 413     echo Expected version of git: $localgit
 414     myexit 1
 415 fi
 416 lpar_git
 417 echo ================= symlink manpages =================
 418 cd $pref/prg/git/share/man
 419 mansects=`ls`
 420 for f in $mansects; do
 421     $sudo mkdir -p $pref/share/man/$f
 422     cd $pref/share/man/$f || {
 423         echo $progname: $pref/share/man/$f: Could not chdir, aborting >&2
 424         myexit 1
 425     }
 426     pwd
 427     $sudo ln -sf ../../../prg/git/share/man/$f/* .
 428 done
 429 if [ -d $pref/.git/. ]; then
 430     echo ================= git commit the symlink =================
 431     commitmsg=$(
 432         echo $progname installed $globalgit on $(hostname)
 433         echo
 434         suuid -t commit,$progname
 435     )
 436     cd $pref/prg
 437     $sudo git add git
 438     echo Commit message:
 439     echo $commitmsg
 440     $sudo git commit -m "$commitmsg"
 441     test "$opt_no_net" = "0" && git pa
 442 fi
 443
 444 myexit 0