:M: Adding source code and Makefile

.gitignore

@@ -0,0 +1 @@
+.monova.history

.monova.config

@@ -0,0 +1,11 @@
+{
+ "MajorKeys": [
+ ":major:", ":M:"
+ ],
+ "MinorKeys": [
+ ":minor:", ":m:"
+ ],
+ "PatchKeys": [
+ ":patch:", ":p:"
+ ]
+}

Makefile

@@ -0,0 +1,27 @@
+PWD:=$(shell pwd)
+VERSION=0.0.0
+MONOVA:=$(shell which monova dot 2> /dev/null)
+
+version:
+ifdef MONOVA
+override VERSION=$(shell monova)
+else
+ $(info "Install monova (https://github.com/jsnjack/monova) to calculate version")
+endif
+
+bin/template-renderer: version main.go cmd/*.go
+ CGO_ENABLED=0 go build -ldflags="-X github.com/surfly/template-renderer/cmd.Version=${VERSION}" -o bin/template-renderer
+
+test:
+ cd cmd && go test
+
+build: test bin/template-renderer
+
+release: build
+ grm release surfly/template-renderer -f bin/template-renderer -t "v`monova`"
+
+.ONESHELL:
+clean:
+ rm -rf bin/*
+
+.PHONY: version release build test

README.md

@@ -1,2 +1,31 @@
 # template-renderer
+
+```
 Standalone golang wrapper for rendering Jinja2 templates
+
+Usage:
+ template-renderer [flags]
+ template-renderer [command]
+
+Available Commands:
+ help Help about any command
+ version Print version
+
+Flags:
+ -h, --help help for template-renderer
+ -i, --input string Input template file (Required)
+ -o, --output string Outfile to write the outcome (Prints to stdout by default)
+
+Use "template-renderer [command] --help" for more information about a command.
+```
+
+Usage examples:
+- Templating to stdout:
+```
+./bin/template-renderer -i test.tpl
+testing value: foo
+```
+- Templating to an output file:
+```
+./bin/template-renderer -i test.tpl -o test.txt
+```

bin/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

cmd/root.go

@@ -0,0 +1,70 @@
+package cmd
+
+import (
+ "os"
+ "fmt"
+ "strings"
+
+ "github.com/noirbizarre/gonja"
+ "github.com/spf13/cobra"
+)
+
+var inputFile string
+var outputFile string
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+ Use: "template-renderer",
+ Short: "Standalone golang wrapper for rendering Jinja2 templates",
+
+ // Uncomment the following line if your bare application
+ // has an action associated with it:
+ RunE: renderTemplate,
+}
+
+func renderTemplate(cmd *cobra.Command, args []string) error {
+
+ var tpl = gonja.Must(gonja.FromFile(inputFile))
+
+ ctx := gonja.Context{}
+ for _, element := range os.Environ() {
+ variable := strings.Split(element, "=")
+ ctx[variable[0]] = variable[1]
+ }
+ out, err := tpl.Execute(ctx)
+ if err != nil {
+ return err
+ }
+ if outputFile == "" {
+ fmt.Printf(out)
+ } else {
+ err := os.WriteFile(outputFile, []byte(out), 0644)
+ if err != nil {
+ return err
+ }
+ }
+
+ return nil
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+ err := rootCmd.Execute()
+ if err != nil {
+ os.Exit(1)
+ }
+}
+
+func init() {
+ // Here you will define your flags and configuration settings.
+ // Cobra supports persistent flags, which, if defined here,
+ // will be global for your application.
+
+ rootCmd.CompletionOptions.DisableDefaultCmd = true
+ rootCmd.Flags().StringVarP(&inputFile, "input", "i", "", "Input template file (Required)")
+ rootCmd.MarkFlagRequired("input")
+ rootCmd.Flags().StringVarP(&outputFile, "output", "o", "", "Outfile to write the outcome (Prints to stdout by default)")
+}
+
+

cmd/root_test.go

@@ -0,0 +1,33 @@
+package cmd
+
+import (
+ "os"
+ "testing"
+)
+
+func TestUtils_RenderTemplate(t *testing.T) {
+ var templateString string = "{{ TEST_STRING | replace('this', 'that', 1) }}"
+ var expectedOutput string = "Something better than that"
+ os.Setenv("TEST_STRING", "Something better than this")
+
+ inputFile = "/tmp/template-renderer-test.in"
+ outputFile = "/tmp/template-renderer-test.out"
+
+ os.Remove(inputFile)
+ err := os.WriteFile(inputFile, []byte(templateString), 0644)
+ if err != nil {
+ t.Errorf("Unexpected error: %s", err)
+ }
+ defer os.Remove(inputFile)
+
+ renderTemplate(nil, []string{})
+ defer os.Remove(outputFile)
+
+ b, err := os.ReadFile(outputFile)
+
+ if string(b) != expectedOutput {
+ t.Errorf("Expected '%s', got '%s'", expectedOutput, string(b))
+ }
+}
+
+

cmd/version.go

@@ -0,0 +1,23 @@
+package cmd
+
+import (
+ "fmt"
+
+ "github.com/spf13/cobra"
+)
+
+// Version is the version of the application calculated with monova
+var Version string
+
+// versionCmd represents the version command
+var versionCmd = &cobra.Command{
+ Use: "version",
+ Short: "Print version",
+ Run: func(cmd *cobra.Command, args []string) {
+ fmt.Println(Version)
+ },
+}
+
+func init() {
+ rootCmd.AddCommand(versionCmd)
+}

go.mod

@@ -0,0 +1,16 @@
+module github.com/surfly/template-renderer
+
+go 1.19
+
+require (
+ github.com/goph/emperror v0.17.1 // indirect
+ github.com/inconshreveable/mousetrap v1.1.0 // indirect
+ github.com/konsorten/go-windows-terminal-sequences v1.0.1 // indirect
+ github.com/noirbizarre/gonja v0.0.0-20200629003239-4d051fd0be61 // indirect
+ github.com/pkg/errors v0.8.1 // indirect
+ github.com/sirupsen/logrus v1.3.0 // indirect
+ github.com/spf13/cobra v1.7.0 // indirect
+ github.com/spf13/pflag v1.0.5 // indirect
+ golang.org/x/crypto v0.0.0-20180904163835-0709b304e793 // indirect
+ golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 // indirect
+)

go.sum

@@ -0,0 +1,63 @@
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main.go

@@ -0,0 +1,7 @@
+package main
+
+import "github.com/surfly/template-renderer/cmd"
+
+func main() {
+ cmd.Execute()
+}