Prints the install script from a given package file or from a package
in the pacman repo.

Original-work-by: Giulio "giulivo" Fidente <[email protected]>
Improvements-by: Xavier Chantry <[email protected]>

Signed-off-by: Allan McRae <[email protected]>
---
 contrib/Makefile.am |    1 +
 contrib/README      |    3 +
 contrib/pacscripts  |  132 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 136 insertions(+), 0 deletions(-)
 create mode 100755 contrib/pacscripts

diff --git a/contrib/Makefile.am b/contrib/Makefile.am
index 2f131ef..3843a3f 100644
--- a/contrib/Makefile.am
+++ b/contrib/Makefile.am
@@ -5,6 +5,7 @@ EXTRA_DIST = \
        gensync \
        pacdiff \
        paclist \
+       pacscripts \
        pacsearch \
        pactree \
        updatesync \
diff --git a/contrib/README b/contrib/README
index 29962b4..0d2153b 100644
--- a/contrib/README
+++ b/contrib/README
@@ -16,6 +16,9 @@ paclist - list all packages installed from a given 
repository. Useful for
 seeing which packages you may have installed from the testing repository,
 for instance.
 
+pacscripts - tries to print out the {pre,post}_{install,remove,upgrade}
+scripts of a given package.
+
 pacsearch - a colorized search combining both -Ss and -Qs output. Installed
 packages are easily identified with a *** and local-only packages are also
 listed.
diff --git a/contrib/pacscripts b/contrib/pacscripts
new file mode 100755
index 0000000..101fb15
--- /dev/null
+++ b/contrib/pacscripts
@@ -0,0 +1,132 @@
+#!/bin/bash
+#
+#   pacscripts : tries to print out the {pre,post}_{install,remove,upgrade}
+#   scripts of a given package
+#
+#   Copyright (c) 2009 Giulio "giulivo" Fidente <[email protected]>
+#   Copyright (c) 2009 Xavier Chantry <[email protected]>
+#
+#   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 2 of the License, 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 <http://www.gnu.org/licenses/>.
+#
+
+# bash options
+set -o nounset
+set -o errexit
+
+progname=$(basename $0)
+progver="0.4"
+
+conf="/etc/pacman.conf"
+
+if [ ! -r "$conf" ]; then
+       echo "ERROR: unable to read $conf"
+       exit 1
+fi
+
+eval $(awk '/DBPath/ {print $1$2$3}' "$conf")
+eval $(awk '/CacheDir/ {print $1$2$3}' "$conf")
+pac_db="${DBPath:-/var/lib/pacman}/local"
+pac_cache="${CacheDir:-/var/cache/pacman/pkg}"
+
+error() {
+       local mesg=$1; shift
+       printf "==> $(gettext "ERROR:") ${mesg}\n" "$@" >&2
+}
+
+usage() {
+       echo "This program prints out the {pre,post}_{install,remove,upgrade} 
scripts"
+       echo "of a given package."
+       echo "Usage: $progname pkgname|pkgfile"
+       echo
+       echo " OPTIONS:"
+       echo "  -h, --help                 Print this help message"
+       echo "  -v, --version              Print program name and version"
+       echo
+       echo "Example: $progname gconf-editor"
+       echo "Example: $progname gconf-editor-2.24.1-1-x86_64.pkg.tar.gz"
+}
+
+spacman() {
+       if [ $EUID -eq 0 ]; then
+               pacman "$@"
+       else
+               if [ ! "$(type -p sudo)" ]; then
+                       error "Cannot find the sudo binary! Is sudo installed?"
+                       error "Otherwise try to run the program as root"
+                       exit 1
+               else
+                       sudo pacman "$@"
+               fi
+       fi
+}
+
+print_db() {
+       pkg=$(pacman -Q "$1")
+       pkg=${pkg/ /-}
+       if [ -f $pac_db/$pkg*/install ]; then
+               cat $pac_db/$pkg*/install
+               echo
+               return 0
+       else
+               error "Package $1 does not include any .INSTALL script"
+               return 1
+       fi
+}
+
+print_pkg() {
+       if ! bsdtar -xOf "$1" .INSTALL 2>/dev/null; then
+               error "Package $1 does not include any .INSTALL script"
+               return 1
+       fi
+       echo
+}
+
+print_scriptlet() {
+       if [ -f "$1" ]; then
+               if bsdtar tf "$1" .PKGINFO &>/dev/null; then
+                       print_pkg "$1"
+                       return
+               fi
+       fi
+       if pacman -Q "$1" &>/dev/null; then
+               print_db "$1"
+               return
+       fi
+       if ! pacman -Si $1 &>/dev/null; then
+               error "Package $1 not found"
+               return 1
+       fi
+       url=$(spacman -Sdp $1 | tail -n1)
+       filename=$(basename $url)
+       if [ ! -f "$pac_cache/$filename" ]; then
+               if ! spacman -Sdw --noconfirm $1 >&2; then
+                       error "Failed to download $1"
+                       return 1
+               fi
+               echo >&2
+       fi
+       print_pkg "$pac_cache/$filename"
+       return
+}
+
+if [ $# -ne 1 ] ; then
+       usage
+       exit 1
+fi
+
+case "$1" in
+       --help|-h) usage; exit 0 ;;
+       --version|-v) echo "$progname version $progver"; exit 0 ;;
+       *) print_scriptlet $1 ;;
+esac
-- 
1.6.1.3

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