1 files changed, 100 insertions, 0 deletions
diff --git a/packaging/source/git-export-release.sh.in b/packaging/source/git-export-release.sh.in
new file mode 100755
index 0000000..854af25
--- /dev/null
+++ b/packaging/source/git-export-release.sh.in
@@ -0,0 +1,100 @@
+#!/bin/bash
+#
+# Creates a release tarball directly from git
+
+# Note that the tarball contents might not exactly match
+# a particular git commit, particularly for untagged
+# commits.
+#
+# An alternative approach would be to generate source tarballs
+# using CPack. That would remove our dependency on git, but if
+# Autotools is any indication it would require continuous
+# maintenance.
+#
+# Copyright 2011 Balint Reczey <balint@balintreczey.hu>
+#
+# Wireshark - Network traffic analyzer
+# By Gerald Combs <gerald@wireshark.org>
+# Copyright 1998 Gerald Combs
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+set -e -u -o pipefail
+
+DESTDIR=.
+
+while getopts "d:" OPTCHAR ; do
+    case $OPTCHAR in
+        d) DESTDIR=$OPTARG ;;
+        *) printf "Unknown option %s\n" "$OPTCHAR" ;;
+    esac
+done
+shift $(( OPTIND - 1 ))
+
+# The remaining parameter, if set, is a package version such as 3.4.5
+# or 3.4.5-67-gabcd4321
+# By default the version from make-version.py + CMake is used.
+PROJECT_VERSION=@PROJECT_VERSION@
+if test -n "${1-}"; then
+    PROJECT_VERSION="$1"
+fi
+
+TARBALL="${DESTDIR}/wireshark-${PROJECT_VERSION}.tar.xz"
+
+# A tarball produced by 'git archive' will have the $Format string
+# substituted due to the use of 'export-subst' in .gitattributes.
+# shellcheck disable=SC2016
+COMMIT='40459284278611128aac5cef35a563218933f8da'
+
+if [[ $COMMIT != \$F* ]] ; then
+    # This file was extracted from a tarball produced by git archive
+    # and so we are not in a git repository.
+    if [[ -f "$TARBALL" ]] ; then
+        # git get-tar-commit-id works outside a git repo, as it
+        # only reads the first 1024 bytes of the tar extended header.
+        if [[ $(git get-tar-commit-id < <(xzcat "$TARBALL")) == "$COMMIT" ]] ; then
+            echo "$TARBALL commit ID matches $COMMIT."
+        else
+            # Allow people to make changes to a downloaded source tarball
+            # and re-tar it?
+            echo "WARNING: $TARBALL is not the original git archive."
+        fi
+        exit 0
+    fi
+
+    echo ""
+    echo "The build system cannot produce a source tarball outside of a git repository."
+    echo "If you are trying to build an RPM package from source extracted from a tarball,"
+    echo "copy it (i.e., wireshark-${PROJECT_VERSION}.tar.xz) to"
+    echo "$DESTDIR"
+    echo "and run the build command again."
+
+    exit 1
+fi
+
+STASH_ID=$(git stash create || echo "")
+
+if [[ -n "$STASH_ID" ]] ; then
+    echo "Setting commit from stash $STASH_ID"
+    COMMIT="$STASH_ID"
+else
+    echo "Setting commit from HEAD"
+    COMMIT="HEAD"
+fi
+
+if [ -f "$TARBALL" ] ; then
+    printf "Found %s\\n" "$TARBALL"
+    if TARBALL_ID=$(git get-tar-commit-id < <(xzcat "$TARBALL")) && COMMIT_ID=$(git rev-parse --verify "$COMMIT") ; then
+        if [[ $TARBALL_ID == "$COMMIT_ID" ]] ; then
+            echo "$TARBALL commit ID matches $COMMIT."
+            exit 0
+        fi
+    fi
+fi
+
+echo "Creating $TARBALL from $COMMIT"
+
+XZ_OPTS=
+echo . | xz --threads=0 > /dev/null 2>&1 && XZ_OPTS=--threads=0
+
+git archive --prefix="wireshark-${PROJECT_VERSION}/" "$COMMIT" | xz $XZ_OPTS > "$TARBALL"