From 84dffc81edcae45991d429d979cd7ef4bae94e69 Mon Sep 17 00:00:00 2001
From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Thu, 19 Feb 2009 17:09:09 +0100
Subject: [PATCH] Add helpers to install MinGW packages

The pre-install.sh and post-install.sh helper are meant to help the stuff
in /src/, of course.

Call pre-install.sh before installing stuff.  This script will output the
name of a temporary Git index which contains the current state.

Now install whatever you want.

Afterwards, call post-install.sh with the name of the temporary Git index
and a commit message as arguments; this will commit the changes.

The advantage to the earlier installation method of packages in /src/ is
that you can do that with a non-pristine state (in other words, you can
have untracked files lying around; they may be overwritten, though).

Note: the use of the plumbing 'diff-files' in post-install.sh is
crucial; we do _not_ want the index to be auto-refreshed; instead,
we want to catch all files that have been touched in the meantime.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 share/msysGit/install-mingw-tar.sh | 23 +++++++++++++++++++++++
 share/msysGit/post-install.sh      | 18 ++++++++++++++++++
 share/msysGit/pre-install.sh       | 10 ++++++++++
 3 files changed, 51 insertions(+)
 create mode 100644 share/msysGit/install-mingw-tar.sh
 create mode 100644 share/msysGit/post-install.sh
 create mode 100644 share/msysGit/pre-install.sh

diff --git a/share/msysGit/install-mingw-tar.sh b/share/msysGit/install-mingw-tar.sh
new file mode 100644
index 0000000000..bfd7d03e4d
--- /dev/null
+++ b/share/msysGit/install-mingw-tar.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+die () {
+	echo "$*" >&2
+	exit 1
+}
+
+test $# -ne 1 && die "Usage: $0 <TARFILE>"
+
+cd /mingw || echo "/mingw does not exist?"
+
+index=$(/share/msysGit/pre-install.sh) || die "Pre-install stage failed"
+
+uncompress=
+case "$1" in
+*.bz2) uncompress=j;;
+*.gz|*.tgz) uncompress=z;;
+esac
+
+tar x${uncompress}mf "$1" || die "Could not untar $1"
+
+/share/msysGit/post-install.sh $index Install "$(basename "$1")" ||
+die "Post-install stage failed"
diff --git a/share/msysGit/post-install.sh b/share/msysGit/post-install.sh
new file mode 100644
index 0000000000..7757b5ac05
--- /dev/null
+++ b/share/msysGit/post-install.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+test $# -lt 2 && {
+	echo "Usage: $0 <GIT_INDEX_FILE> <MESSAGE...>"
+	exit 1
+}
+
+# bashism
+set -o pipefail
+
+cd / &&
+(export GIT_INDEX_FILE=$1 &&
+ git diff-files --name-only -z &&
+ git ls-files --exclude-standard --others -z) |
+git update-index -z --add --remove --stdin &&
+shift &&
+git commit -s -m "$*"
+
diff --git a/share/msysGit/pre-install.sh b/share/msysGit/pre-install.sh
new file mode 100644
index 0000000000..60c6f79346
--- /dev/null
+++ b/share/msysGit/pre-install.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# This script records the current state of the msysGit root tree in a
+# temporary Git index
+
+cd / &&
+export GIT_INDEX_FILE=/.git/install-index.$$ &&
+cp .git/index $GIT_INDEX_FILE &&
+git add . &&
+echo $GIT_INDEX_FILE
-- 
2.11.4.GIT