From d90fbde7a9805c984ef4c126f5ab58113a8488ef Mon Sep 17 00:00:00 2001
From: Malf Furious <m@lfurio.us>
Date: Thu, 27 Apr 2017 23:46:21 -0400
Subject: Add resolvers module

---
 resolvers.sh | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 resolvers.sh

diff --git a/resolvers.sh b/resolvers.sh
new file mode 100644
index 0000000..ff4e38f
--- /dev/null
+++ b/resolvers.sh
@@ -0,0 +1,79 @@
+##
+# get_commit <version>
+#
+# Resolve a revision to a commit ID, exit via fatal error if
+# resolution cannot take place.
+##
+function get_commit
+{
+    # local repository #
+    if [[ "$remote" == "" ]]; then
+        if [[ "$1" == "HEAD" ]]; then
+            cat "$path/HEAD"
+
+        elif [[ "$1" == "BASE" ]]; then
+            cat ".systr/BASE"
+
+        elif [[ "$1" == "TRAC" ]]; then
+            cat ".systr/TRAC"
+
+        elif [[ "$1" == "NULL" ]]; then
+            echo "NULL"
+
+        elif [ -f "$path/refs/$1" ]; then
+            cat "$path/refs/$1"
+
+        elif [ -f "$path/$1/.commit.systr" ]; then
+            echo "$1"
+
+        else
+            echo "Error: $1 not a revision" >&2
+            exit
+        fi
+
+    # remote repository #
+    else
+        exit
+
+    fi
+}
+
+##
+# get_symref <version>
+#
+# Resolve a revision to a symbolic reference, exit via fatal
+# error if resolution cannot take place.
+##
+function get_symref
+{
+    # local repository #
+    if [[ "$remote" == "" ]]; then
+        if [[ "$1" == "HEAD" ]]; then
+            echo "HEAD"
+
+        elif [[ "$1" == "BASE" ]]; then
+            echo "BASE"
+
+        elif [[ "$1" == "TRAC" ]]; then
+            cat ".systr/TRAC"
+
+        elif [[ "$1" == "NULL" ]]; then
+            echo "NULL"
+
+        elif [ -f "$path/refs/$1" ]; then
+            echo "refs/$1"
+
+        elif [ -f "$path/$1/.commit.systr" ]; then
+            echo "$1"
+
+        else
+            echo "Error: $1 not a revision" >&2
+            exit
+        fi
+
+    # remote repository #
+    else
+        exit
+
+    fi
+}
-- 
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