Import LinuxCNC source tree

scripts/get-version-from-git

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+if [ -n "$EMC2_HOME" ]; then
+    source "$EMC2_HOME"/scripts/githelper.sh
+else
+    source "$(git rev-parse --show-toplevel)"/scripts/githelper.sh
+fi
+
+githelper "$1"
+
+if [ "$DEB_COMPONENT" = "scratch" ]; then
+    DESCRIBE=$(git describe --tags --exact-match 2>/dev/null)
+    if [ -n "$DESCRIBE" ]; then
+        echo "$DESCRIBE"
+    else
+        DESCRIBE=$(git describe --tags 2>/dev/null)
+        if [ -n "$DESCRIBE" ]; then
+            echo "$DESCRIBE"
+        else
+            BR=$(printf '%s' "$GIT_BRANCH" | tr '[:upper:]' '[:lower:]' | sed -E 's/[^-.+:~a-z0-9]/-/g; s/-{2,}/-/g; s/^-//; s/-$//')
+            echo "v$(git show HEAD:VERSION | cut -d ' ' -f 1)~${BR:-head}~$(git show --pretty=format:%h HEAD | head -1)"
+        fi
+    fi
+else
+    # known branches get the "describe" of the most recent signed git tag,
+    # or of the most recent unsigned tag if no signed tags are found
+    git describe --match "$GIT_TAG"
+fi
+