initial checkin

+# Generated with m4
+version.go
+.version*

+PACKAGE = gitlab.weird-web-workers.org/golang/version
+
+SOURCES = version.go \
+	  tools.go
+
+VERSION = 0.0.1
+REVISION = $(shell git rev-parse HEAD)
+BUILDTIME= "$(shell date -u +'%Y-%m-%dT%H:%M:%SZ')"
+
+GOOS = $(shell go env GOOS)
+GOARCH = $(shell go env GOARCH)
+
+LIBRARY = $(GOPATH)/pkg/$(GOOS)_$(GOARCH)/$(PACKAGE).a
+
+.PHONY: all clean .version
+
+all: $(LIBRARY)
+
+$(LIBRARY): $(SOURCES)
+	go install $(PACKAGE)
+
+.version:
+	-@printf "%s\n%s\n%s" \
+		"$(VERSION)" "$(REVISION)" "$(BUILDTIME)" >$@.new
+	-@diff $@ $@.new >/dev/null 2>&1 && rm $@.new || mv $@.new $@
+
+version.go: version.go.m4 .version
+	-@m4 -Dm4_version=$(VERSION) \
+	   -Dm4_revision=$(REVISION) \
+	   -Dm4_build_time=$(BUILDTIME) \
+	   -Dm4_package=$(PACKAGE) \
+	   $< >$@
+
+clean:
+	-@rm -f version.go 2>/dev/null
+	-@rm -f .version 2>/dev/null
+	-@rm -f $(LIBRARY) 2>/dev/null

+/*
+Version management tools.
+
+Authors:
+Georg Hopp <georg@steffers.org>
+
+Changes:
+2018-10-02 [Georg Hopp] File created.
+
+Copyright © 2018 Georg Hopp
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+package version
+
+import (
+	"encoding/json"
+)
+
+type Version struct {
+	Package string `json:"Package"`
+	Version string `json:"Version"`
+	Revision string `json:"Revision"`
+	BuildTime string `json:"BuildTime"`
+}
+
+type versionSlice map[string]Version
+
+var (
+	versions = make(versionSlice)
+)
+
+func (v Version) Register() {
+	versions[v.Package] = v
+}
+
+func (vs versionSlice)Json() string {
+	vSlice := make([]Version, len(vs))
+	for v := range vs {
+		vSlice = append(vSlice, v)
+	}
+	vJson, err := json.Marshal(vSlice)
+	logger.Default.FailOnError(err, "Unable to marshal versions")
+	return vJson
+)
+
+// vim: ts=4 sts=4 sw=4 noet tw=72:

+/*
+Package version information.
+
+Authors:
+Georg Hopp <georg@steffers.org>
+
+Changes:
+2018-09-30 [Georg Hopp] File created.
+
+Copyright © 2018 Georg Hopp
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+package version
+
+import (
+	"gitlab.weird-web-workers.org/golang/version"
+)
+
+const (
+	VERSION = Version{
+		Package: "m4_package",
+		Version: "m4_version",
+		Revision: "m4_revision",
+		BuildTime: "m4_build_time",
+	}
+)
+
+// vim: ts=4 sts=4 sw=4 noet tw=72: