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-rw-r--r--cmd/podman/formats/templates.go78
1 files changed, 78 insertions, 0 deletions
diff --git a/cmd/podman/formats/templates.go b/cmd/podman/formats/templates.go
new file mode 100644
index 000000000..c2582552a
--- /dev/null
+++ b/cmd/podman/formats/templates.go
@@ -0,0 +1,78 @@
+package formats
+
+import (
+ "bytes"
+ "encoding/json"
+ "strings"
+ "text/template"
+)
+
+// basicFunctions are the set of initial
+// functions provided to every template.
+var basicFunctions = template.FuncMap{
+ "json": func(v interface{}) string {
+ buf := &bytes.Buffer{}
+ enc := json.NewEncoder(buf)
+ enc.SetEscapeHTML(false)
+ _ = enc.Encode(v)
+ // Remove the trailing new line added by the encoder
+ return strings.TrimSpace(buf.String())
+ },
+ "split": strings.Split,
+ "join": strings.Join,
+ "title": strings.Title,
+ "lower": strings.ToLower,
+ "upper": strings.ToUpper,
+ "pad": padWithSpace,
+ "truncate": truncateWithLength,
+}
+
+// HeaderFunctions are used to created headers of a table.
+// This is a replacement of basicFunctions for header generation
+// because we want the header to remain intact.
+// Some functions like `split` are irrelevant so not added.
+var headerFunctions = template.FuncMap{
+ "json": func(v string) string {
+ return v
+ },
+ "title": func(v string) string {
+ return v
+ },
+ "lower": func(v string) string {
+ return v
+ },
+ "upper": func(v string) string {
+ return v
+ },
+ "truncate": func(v string, l int) string {
+ return v
+ },
+}
+
+// Parse creates a new anonymous template with the basic functions
+// and parses the given format.
+func Parse(format string) (*template.Template, error) {
+ return NewParse("", format)
+}
+
+// NewParse creates a new tagged template with the basic functions
+// and parses the given format.
+func NewParse(tag, format string) (*template.Template, error) {
+ return template.New(tag).Funcs(basicFunctions).Parse(format)
+}
+
+// padWithSpace adds whitespace to the input if the input is non-empty
+func padWithSpace(source string, prefix, suffix int) string {
+ if source == "" {
+ return source
+ }
+ return strings.Repeat(" ", prefix) + source + strings.Repeat(" ", suffix)
+}
+
+// truncateWithLength truncates the source string up to the length provided by the input
+func truncateWithLength(source string, length int) string {
+ if len(source) < length {
+ return source
+ }
+ return source[:length]
+}