templates: attach directly from templates

Attach a file from templates. Add a split template function.

{{- .Attach "LICENSE" -}}

or

{{range (exec "find ./doc -type f -name *.scd" "" | split "\n") -}}
	{{with . }}
		{{- $.Attach . -}}
	{{- end}}
{{- end}}

Fixes: https://todo.sr.ht/~rjarry/aerc/109
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/templates/functions.go b/lib/templates/functions.go
index f083c8fb..692974fd 100644
--- a/lib/templates/functions.go
+++ b/lib/templates/functions.go
@@ -240,6 +240,14 @@ func join(sep string, elems []string) string {
 	return strings.Join(elems, sep)
 }
 
+func split(sep string, s string) []string {
+	sp := strings.Split(s, sep)
+	for i := range sp {
+		sp[i] = strings.TrimSpace(sp[i])
+	}
+	return sp
+}
+
 // removes a signature from the piped in message
 func trimSignature(message string) string {
 	var res strings.Builder
@@ -335,6 +343,7 @@ var templateFuncs = template.FuncMap{
 	"humanReadable": humanReadable,
 	"cwd":           cwd,
 	"join":          join,
+	"split":         split,
 	"trimSignature": trimSignature,
 	"compactDir":    compactDir,
 	"match":         parse.MatchCache,