File: gnupload

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#!/bin/sh
# Sign files and upload them.

scriptversion=2018-05-19.18; # UTC

# Copyright (C) 2004-2018 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# Originally written by Alexandre Duret-Lutz <adl@gnu.org>.
# The master copy of this file is maintained in the gnulib Git repository.
# Please send bug reports and feature requests to bug-gnulib@gnu.org.

set -e

GPG=gpg
# Choose the proper version of gpg, so as to avoid a
# "gpg-agent is not available in this session" error
# when gpg-agent is version 3 but gpg is still version 1.
# FIXME-2020: remove, once all major distros ship gpg version 3 as /usr/bin/gpg
gpg_agent_version=`(gpg-agent --version) 2>/dev/null | sed -e '2,$d' -e 's/^[^0-9]*//'`
case "$gpg_agent_version" in
  2.*)
    gpg_version=`(gpg --version) 2>/dev/null | sed -e '2,$d' -e 's/^[^0-9]*//'`
    case "$gpg_version" in
      1.*)
        if (type gpg2) >/dev/null 2>/dev/null; then
          # gpg2 is present.
          GPG=gpg2
        else
          # gpg2 is missing. Ubuntu users should install the package 'gnupg2'.
          echo "WARNING: Using 'gpg', which is too old. You should install 'gpg2'." 1>&2
        fi
        ;;
    esac
    ;;
esac

GPG="${GPG} --batch --no-tty"
conffile=.gnuploadrc
to=
dry_run=false
replace=
symlink_files=
delete_files=
delete_symlinks=
collect_var=
dbg=
nl='
'

usage="Usage: $0 [OPTION]... [CMD] FILE... [[CMD] FILE...]

Sign all FILES, and process them at the destinations specified with --to.
If CMD is not given, it defaults to uploading.  See examples below.

Commands:
  --delete                 delete FILES from destination
  --symlink                create symbolic links
  --rmsymlink              remove symbolic links
  --                       treat the remaining arguments as files to upload

Options:
  --to DEST                specify a destination DEST for FILES
                           (multiple --to options are allowed)
  --user NAME              sign with key NAME
  --replace                allow replacements of existing files
  --symlink-regex[=EXPR]   use sed script EXPR to compute symbolic link names
  -n, --dry-run            do nothing, show what would have been done
                           (including the constructed directive file)
  --version                output version information and exit
  -h, --help               print this help text and exit

If --symlink-regex is given without EXPR, then the link target name
is created by replacing the version information with '-latest', e.g.:
  foo-1.3.4.tar.gz -> foo-latest.tar.gz

Recognized destinations are:
  alpha.gnu.org:DIRECTORY
  savannah.gnu.org:DIRECTORY
  savannah.nongnu.org:DIRECTORY
  ftp.gnu.org:DIRECTORY
                           build directive files and upload files by FTP
  download.gnu.org.ua:{alpha|ftp}/DIRECTORY
                           build directive files and upload files by SFTP
  [user@]host:DIRECTORY    upload files with scp

Options and commands are applied in order.  If the file $conffile exists
in the current working directory, its contents are prepended to the
actual command line options.  Use this to keep your defaults.  Comments
(#) and empty lines in $conffile are allowed.

<https://www.gnu.org/prep/maintain/html_node/Automated-FTP-Uploads.html>
gives some further background.

Examples:
1. Upload foobar-1.0.tar.gz to ftp.gnu.org:
  gnupload --to ftp.gnu.org:foobar foobar-1.0.tar.gz

2. Upload foobar-1.0.tar.gz and foobar-1.0.tar.xz to ftp.gnu.org:
  gnupload --to ftp.gnu.org:foobar foobar-1.0.tar.gz foobar-1.0.tar.xz

3. Same as above, and also create symbolic links to foobar-latest.tar.*:
  gnupload --to ftp.gnu.org:foobar \\
           --symlink-regex \\
           foobar-1.0.tar.gz foobar-1.0.tar.xz

4. Upload foobar-0.9.90.tar.gz to two sites:
  gnupload --to alpha.gnu.org:foobar \\
           --to sources.redhat.com:~ftp/pub/foobar \\
           foobar-0.9.90.tar.gz

5. Delete oopsbar-0.9.91.tar.gz and upload foobar-0.9.91.tar.gz
   (the -- terminates the list of files to delete):
  gnupload --to alpha.gnu.org:foobar \\
           --to sources.redhat.com:~ftp/pub/foobar \\
           --delete oopsbar-0.9.91.tar.gz \\
           -- foobar-0.9.91.tar.gz

gnupload executes a program ncftpput to do the transfers; if you don't
happen to have an ncftp package installed, the ncftpput-ftp script in
the build-aux/ directory of the gnulib package
(https://savannah.gnu.org/projects/gnulib) may serve as a replacement.

Send patches and bug reports to <bug-gnulib@gnu.org>."

# Read local configuration file
if test -r "$conffile"; then
  echo "$0: Reading configuration file $conffile"
  conf=`sed 's/#.*$//;/^$/d' "$conffile" | tr "\015$nl" '  '`
  eval set x "$conf \"\$@\""
  shift
fi

while test -n "$1"; do
  case $1 in
  -*)
    collect_var=
    case $1 in
    -h | --help)
      echo "$usage"
      exit $?
      ;;
    --to)
      if test -z "$2"; then
        echo "$0: Missing argument for --to" 1>&2
        exit 1
      elif echo "$2" | grep 'ftp-upload\.gnu\.org' >/dev/null; then
        echo "$0: Use ftp.gnu.org:PKGNAME or alpha.gnu.org:PKGNAME" >&2
        echo "$0: for the destination, not ftp-upload.gnu.org (which" >&2
        echo "$0:  is used for direct ftp uploads, not with gnupload)." >&2
        echo "$0: See --help and its examples if need be." >&2
        exit 1
      else
        to="$to $2"
        shift
      fi
      ;;
    --user)
      if test -z "$2"; then
        echo "$0: Missing argument for --user" 1>&2
        exit 1
      else
        GPG="$GPG --local-user $2"
        shift
      fi
      ;;
    --delete)
      collect_var=delete_files
      ;;
    --replace)
      replace="replace: true"
      ;;
    --rmsymlink)
      collect_var=delete_symlinks
      ;;
    --symlink-regex=*)
      symlink_expr=`expr "$1" : '[^=]*=\(.*\)'`
      ;;
    --symlink-regex)
      symlink_expr='s|-[0-9][0-9\.]*\(-[0-9][0-9]*\)\{0,1\}\.|-latest.|'
      ;;
    --symlink)
      collect_var=symlink_files
      ;;
    -n | --dry-run)
      dry_run=:
      ;;
    --version)
      echo "gnupload $scriptversion"
      exit $?
      ;;
    --)
      shift
      break
      ;;
    -*)
      echo "$0: Unknown option '$1', try '$0 --help'" 1>&2
      exit 1
      ;;
    esac
    ;;
  *)
    if test -z "$collect_var"; then
      break
    else
      eval "$collect_var=\"\$$collect_var $1\""
    fi
    ;;
  esac
  shift
done

dprint()
{
  echo "Running $* ..."
}

if $dry_run; then
  dbg=dprint
fi

if test -z "$to"; then
  echo "$0: Missing destination sites" >&2
  exit 1
fi

if test -n "$symlink_files"; then
  x=`echo "$symlink_files" | sed 's/[^ ]//g;s/  //g'`
  if test -n "$x"; then
    echo "$0: Odd number of symlink arguments" >&2
    exit 1
  fi
fi

if test $# = 0; then
  if test -z "${symlink_files}${delete_files}${delete_symlinks}"; then
    echo "$0: No file to upload" 1>&2
    exit 1
  fi
else
  # Make sure all files exist.  We don't want to ask
  # for the passphrase if the script will fail.
  for file
  do
    if test ! -f $file; then
      echo "$0: Cannot find '$file'" 1>&2
      exit 1
    elif test -n "$symlink_expr"; then
      linkname=`echo $file | sed "$symlink_expr"`
      if test -z "$linkname"; then
        echo "$0: symlink expression produces empty results" >&2
        exit 1
      elif test "$linkname" = $file; then
        echo "$0: symlink expression does not alter file name" >&2
        exit 1
      fi
    fi
  done
fi

# Make sure passphrase is not exported in the environment.
unset passphrase
unset passphrase_fd_0
GNUPGHOME=${GNUPGHOME:-$HOME/.gnupg}

# Reset PATH to be sure that echo is a built-in.  We will later use
# 'echo $passphrase' to output the passphrase, so it is important that
# it is a built-in (third-party programs tend to appear in 'ps'
# listings with their arguments...).
# Remember this script runs with 'set -e', so if echo is not built-in
# it will exit now.
if $dry_run || grep -q "^use-agent" $GNUPGHOME/gpg.conf; then :; else
  PATH=/empty echo -n "Enter GPG passphrase: "
  stty -echo
  read -r passphrase
  stty echo
  echo
  passphrase_fd_0="--passphrase-fd 0"
fi

if test $# -ne 0; then
  for file
  do
    echo "Signing $file ..."
    rm -f $file.sig
    echo "$passphrase" | $dbg $GPG $passphrase_fd_0 -ba -o $file.sig $file
  done
fi


# mkdirective DESTDIR BASE FILE STMT
# Arguments: See upload, below
mkdirective ()
{
  stmt="$4"
  if test -n "$3"; then
    stmt="
filename: $3$stmt"
  fi

  cat >${2}.directive<<EOF
version: 1.2
directory: $1
comment: gnupload v. $scriptversion$stmt
EOF
  if $dry_run; then
    echo "File ${2}.directive:"
    cat ${2}.directive
    echo "File ${2}.directive:" | sed 's/./-/g'
  fi
}

mksymlink ()
{
  while test $# -ne 0
  do
    echo "symlink: $1 $2"
    shift
    shift
  done
}

# upload DEST DESTDIR BASE FILE STMT FILES
# Arguments:
#  DEST     Destination site;
#  DESTDIR  Destination directory;
#  BASE     Base name for the directive file;
#  FILE     Name of the file to distribute (may be empty);
#  STMT     Additional statements for the directive file;
#  FILES    List of files to upload.
upload ()
{
  dest=$1
  destdir=$2
  base=$3
  file=$4
  stmt=$5
  files=$6

  rm -f $base.directive $base.directive.asc
  case $dest in
    alpha.gnu.org:*)
      mkdirective "$destdir" "$base" "$file" "$stmt"
      echo "$passphrase" | $dbg $GPG $passphrase_fd_0 --clearsign $base.directive
      $dbg ncftpput ftp-upload.gnu.org /incoming/alpha $files $base.directive.asc
      ;;
    ftp.gnu.org:*)
      mkdirective "$destdir" "$base" "$file" "$stmt"
      echo "$passphrase" | $dbg $GPG $passphrase_fd_0 --clearsign $base.directive
      $dbg ncftpput ftp-upload.gnu.org /incoming/ftp $files $base.directive.asc
      ;;
    savannah.gnu.org:*)
      if test -z "$files"; then
        echo "$0: warning: standalone directives not applicable for $dest" >&2
      fi
      $dbg ncftpput savannah.gnu.org /incoming/savannah/$destdir $files
      ;;
    savannah.nongnu.org:*)
      if test -z "$files"; then
        echo "$0: warning: standalone directives not applicable for $dest" >&2
      fi
      $dbg ncftpput savannah.nongnu.org /incoming/savannah/$destdir $files
      ;;
    download.gnu.org.ua:alpha/*|download.gnu.org.ua:ftp/*)
      destdir_p1=`echo "$destdir" | sed 's,^[^/]*/,,'`
      destdir_topdir=`echo "$destdir" | sed 's,/.*,,'`
      mkdirective "$destdir_p1" "$base" "$file" "$stmt"
      echo "$passphrase" | $dbg $GPG $passphrase_fd_0 --clearsign $base.directive
      for f in $files $base.directive.asc
      do
        echo put $f
      done | $dbg sftp -b - puszcza.gnu.org.ua:/incoming/$destdir_topdir
      ;;
    /*)
      dest_host=`echo "$dest" | sed 's,:.*,,'`
      mkdirective "$destdir" "$base" "$file" "$stmt"
      echo "$passphrase" | $dbg $GPG $passphrase_fd_0 --clearsign $base.directive
      $dbg cp $files $base.directive.asc $dest_host
      ;;
    *)
      if test -z "$files"; then
        echo "$0: warning: standalone directives not applicable for $dest" >&2
      fi
      $dbg scp $files $dest
      ;;
  esac
  rm -f $base.directive $base.directive.asc
}

#####
# Process any standalone directives
stmt=
if test -n "$symlink_files"; then
  stmt="$stmt
`mksymlink $symlink_files`"
fi

for file in $delete_files
do
  stmt="$stmt
archive: $file"
done

for file in $delete_symlinks
do
  stmt="$stmt
rmsymlink: $file"
done

if test -n "$stmt"; then
  for dest in $to
  do
    destdir=`echo $dest | sed 's/[^:]*://'`
    upload "$dest" "$destdir" "`hostname`-$$" "" "$stmt"
  done
fi

# Process actual uploads
for dest in $to
do
  for file
  do
    echo "Uploading $file to $dest ..."
    stmt=
    #
    # allowing file replacement is all or nothing.
    if test -n "$replace"; then stmt="$stmt
$replace"
    fi
    #
    files="$file $file.sig"
    destdir=`echo $dest | sed 's/[^:]*://'`
    if test -n "$symlink_expr"; then
      linkname=`echo $file | sed "$symlink_expr"`
      stmt="$stmt
symlink: $file $linkname
symlink: $file.sig $linkname.sig"
    fi
    upload "$dest" "$destdir" "$file" "$file" "$stmt" "$files"
  done
done

exit 0

# Local variables:
# eval: (add-hook 'before-save-hook 'time-stamp)
# time-stamp-start: "scriptversion="
# time-stamp-format: "%:y-%02m-%02d.%02H"
# time-stamp-time-zone: "UTC0"
# time-stamp-end: "; # UTC"
# End: