Add slim-sprig functions to template language

slim-sprig is a lightweight library containing a number of useful helper functions which are useful to use in go templates. Include it in debos so we can use the functions in recipes. Signed-off-by: Christopher Obbard <[email protected]>
go-debos · Nov 28, 2023 · 34ae5ee · 34ae5ee
1 parent 659acaa
commit 34ae5ee
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diff --git a/actions/recipe.go b/actions/recipe.go
@@ -30,10 +30,11 @@ Comments are allowed and should be prefixed with '#' symbol.
      property2: {{$Var}}
 
 
-The following custom template functions are available
+The following custom template functions are available:
 
 - sector: Returns the argument * 512 (convential sector size) e.g. `{{ sector 64 }}`
 - escape: Shell escape the  argument `{{ escape $var }}`
+- functions from [slim-sprig](https://go-task.github.io/slim-sprig/)
 
 Mandatory properties for recipe:
 
@@ -81,6 +82,7 @@ import (
 	"github.com/go-debos/debos"
 	"gopkg.in/yaml.v2"
 	"github.com/alessio/shellescape"
+	"github.com/go-task/slim-sprig/v3"
 	"path"
 	"text/template"
 	"log"
@@ -246,6 +248,9 @@ func (r *Recipe) Parse(file string, printRecipe bool, dump bool, templateVars ..
 	}
 	t.Funcs(funcs)
 
+	/* Add slim-sprig functions to template language */
+	t.Funcs(sprig.FuncMap())
+
 	if _, err := t.ParseFiles(file); err != nil {
 		return err
 	}

diff --git a/go.mod b/go.mod
@@ -7,6 +7,7 @@ require (
 	github.com/alessio/shellescape v1.4.2
 	github.com/docker/go-units v0.5.0
 	github.com/go-debos/fakemachine v0.0.7
+	github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
 	github.com/google/uuid v1.4.0
 	github.com/jessevdk/go-flags v1.5.0
 	github.com/sjoerdsimons/ostree-go v0.0.0-20201014091107-8fae757256f8

diff --git a/go.sum b/go.sum
@@ -11,6 +11,8 @@ github.com/go-debos/fakemachine v0.0.7-0.20231110164520-5b4b7a21f3f6 h1:SEK7MCa4
 github.com/go-debos/fakemachine v0.0.7-0.20231110164520-5b4b7a21f3f6/go.mod h1:FJxCgej/pEl7zHZ4xUrVncvjAQ2oMyQ/zQcMKpjST2o=
 github.com/go-debos/fakemachine v0.0.7 h1:TyAnZZvlfyWSzT93gMNgMfHijL9guVoNt40IaHV/Xuk=
 github.com/go-debos/fakemachine v0.0.7/go.mod h1:FJxCgej/pEl7zHZ4xUrVncvjAQ2oMyQ/zQcMKpjST2o=
+github.com/go-task/slim-sprig/v3 v3.0.0 h1:sUs3vkvUymDpBKi3qH1YSqBQk9+9D/8M2mN1vB6EwHI=
+github.com/go-task/slim-sprig/v3 v3.0.0/go.mod h1:W848ghGpv3Qj3dhTPRyJypKRiqCdHZiAzKg9hl15HA8=
 github.com/google/uuid v1.4.0 h1:MtMxsa51/r9yyhkyLsVeVt0B+BGQZzpQiTQ4eHZ8bc4=
 github.com/google/uuid v1.4.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/jessevdk/go-flags v1.5.0 h1:1jKYvbxEjfUl0fmqTCOfonvskHHXMjBySTLW4y9LFvc=