Add build script and build make target

Makefile

@@ -1,5 +1,8 @@
-test:
+build:
+	./build.sh
+
+test: build
 	test/run.sh
 
 .SILENT:
-.PHONY: test
+.PHONY: build test

build.sh

@@ -0,0 +1,66 @@
+#! /usr/bin/env bash
+source "src/lib/dotify-version.sh"
+source "src/lib/trim.sh"
+
+resolve_link() {
+  $(type -p greadlink readlink | head -1) $1
+}
+
+abs_dirname() {
+  local cwd="$(pwd)"
+  local path="$1"
+
+  while [ -n "$path" ]; do
+    cd "${path%/*}"
+    local name="${path##*/}"
+    path="$(resolve_link "$name" || true)"
+  done
+
+  pwd
+  cd "$cwd"
+}
+
+
+#
+# Config
+#
+
+source="src/bin/dotify"
+target="bin/dotify"
+
+
+#
+# Setup
+#
+
+root="$(abs_dirname "$0")"
+cd "$(dirname "$root/$source")"
+source="$(basename "$source")"
+output=""
+
+
+#
+# Building
+#
+
+while IFS= read line; do
+  if [[ "$line" == "#"* ]]; then
+    # Replace {{VERSION}} placeholder in comments.
+    line="${line/\{\{VERSION\}\}/$(dotify-version)}"
+  fi
+
+  if [[ "$line" == "source \""*"\"" ]]; then
+    # Inject content of sourced file directly into output.
+    line="$(trim "$line")"
+    file="${line/#source \"/}"
+    file="${file/%\"/}"
+    output="${output}$(cat "$file")\n\n"
+  else
+    # Append line to output.
+    output="${output}${line}\n"
+  fi
+done < "$source"
+
+cd "$root"
+echo -e "$output" > "$target"
+chmod +x "$target"