[erlang] Restore accidentally removed script

[Peter Lemenkov]

commit cd180d852da7f02ba8cc32ad994886a2fbdbd7a7
Author: Peter Lemenkov <lemenkov at gmail.com>
Date:   Fri Oct 7 17:23:20 2011 +0400

    Restore accidentally removed script
    
    Signed-off-by: Peter Lemenkov <lemenkov at gmail.com>

 otp-get-patches.sh |   92 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 92 insertions(+), 0 deletions(-)
---
diff --git a/otp-get-patches.sh b/otp-get-patches.sh
new file mode 100755
index 0000000..5033e60
--- /dev/null
+++ b/otp-get-patches.sh
@@ -0,0 +1,92 @@
+#!/bin/bash
+# Usage:
+#    ./otp-get-patches.sh /path/to/otp OTP_R14B02 fedora-R14B02
+#
+# otp-get-patches.sh - update erlang.spec and otp-00*.patch files
+#
+# otp-get-patches.sh updates the erlang.spec and otp-00*.patch
+# files in the git index. After an otp-get-patches.sh run, you
+# will need to review the stage git changes, possibly adapt the
+# Release: and %changelog parts of erlang spec, and can then
+# "git commit" everything.
+#
+# Caution: Leave the four special comment lines untouched in the
+# spec file, as otp-get-patches.sh requires them and will only
+# touch erlang.spec between the respective start/end pair:
+#
+# # start of autogenerated patch tag list
+# # end of autogenerated patch tag list
+# # start of autogenerated prep patch list
+# # end of autogenerated prep patch list
+#
+# The following special comment lines in the git commit messages
+# will be interpreted:
+#
+#    Fedora-Spec-Comment: This patch only applies to EL6 builds
+#    Fedora-Spec-Before: %if 0%?el6}
+#    Fedora-Spec-After: %endif
+#
+# If there is no "Fedora-Spec-Comment:" line, we will use
+# "Fedora specific patch".
+
+# Command line parsing
+otp_dir="${1:?'Fatal: otp git repo dir required'}"
+otp_upstream="${2:?'Fatal: git ref to upstream release required'}"
+otp_fedora="${3:?'Fatal: git ref to branch with fedora patches required'}"
+
+# Setup
+set -e
+# set -x
+tmpdir="$(mktemp -d --tmpdir="$PWD")"
+
+# Generate patch files
+pushd "$otp_dir"
+git format-patch -N -o "$tmpdir" "${otp_upstream}..${otp_fedora}" > "$tmpdir/patch-list.txt"
+popd
+
+test -s "$tmpdir/patch-list.txt"
+
+# Process patch files
+echo "# start of autogenerated patch tag list" > "$tmpdir/patch-list-tags.txt"
+echo "# start of autogenerated prep patch list" > "$tmpdir/patch-list-prep.txt"
+n=1
+while read patch
+do
+	otppatch="$(dirname "$patch")/otp-$(basename "$patch")"
+	${SED-sed} -e '1d' -e '/^-- $/,$d' "$patch" > "$otppatch"
+	rm -f "$patch"
+	comment="$(sed -n 's/^Fedora-Spec-Comment:\s*//p' "$otppatch")"
+	if test "x$comment" = "x"; then comment="Fedora specific patch"; fi
+	echo "# ${comment}" >> "$tmpdir/patch-list-tags.txt"
+	echo "#   $(sed -n 's/^Subject: \[PATCH\] //p' "$otppatch")" >> "$tmpdir/patch-list-tags.txt"
+	echo "Patch$n: $(basename "$otppatch")" >> "$tmpdir/patch-list-tags.txt"
+	base="$(basename "$patch" ".patch" | sed 's/^00[0-9][0-9]-//')"
+	backupext=".$(echo -n "$base" | tr -c -s '[:alnum:]' '_')"
+	sed -n 's/^Fedora-Spec-Before:\s*//p' "$otppatch" >> "$tmpdir/patch-list-prep.txt"
+	echo "%patch$n -p1 -b ${backupext}" >> "$tmpdir/patch-list-prep.txt"
+	sed -n 's/^Fedora-Spec-After:\s*//p' "$otppatch" >> "$tmpdir/patch-list-prep.txt"
+	n=$(($n + 1))
+done < "$tmpdir/patch-list.txt"
+echo "# end of autogenerated patch tag list" >> "$tmpdir/patch-list-tags.txt"
+echo "# end of autogenerated prep patch list" >> "$tmpdir/patch-list-prep.txt"
+
+# Create updated spec file
+specfile="erlang.spec"
+newspec1="${tmpdir}/${specfile}.new1"
+newspec2="${tmpdir}/${specfile}.new2"
+sed '/^# start of autogenerated patch tag list$/,$d' "$specfile" > "$newspec1"
+cat "$tmpdir/patch-list-tags.txt" >> "$newspec1"
+sed '1,/^# end of autogenerated patch tag list/d' "$specfile" >> "$newspec1"
+sed '/^# start of autogenerated prep patch list$/,$d' "$newspec1" > "$newspec2"
+cat "$tmpdir/patch-list-prep.txt" >> "$newspec2"
+sed '1,/^# end of autogenerated prep patch list/d' "$newspec1" >> "$newspec2"
+
+# Actually put all changes into git index
+git rm -f otp-00*.patch
+mv "$tmpdir/otp-00"*.patch .
+git add otp-00*.patch
+mv -f "$newspec2" "$specfile"
+git add "$specfile"
+
+rm -rf "$tmpdir"
+# End of file.