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71 lines
2.4 KiB
Go
71 lines
2.4 KiB
Go
package funcs
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import (
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"time"
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"github.com/zclconf/go-cty/cty"
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"github.com/zclconf/go-cty/cty/function"
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)
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// TimestampFunc constructs a function that returns a string representation of the current date and time.
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var TimestampFunc = function.New(&function.Spec{
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Params: []function.Parameter{},
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Type: function.StaticReturnType(cty.String),
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Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
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return cty.StringVal(time.Now().UTC().Format(time.RFC3339)), nil
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},
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})
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// TimeAddFunc constructs a function that adds a duration to a timestamp, returning a new timestamp.
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var TimeAddFunc = function.New(&function.Spec{
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Params: []function.Parameter{
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{
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Name: "timestamp",
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Type: cty.String,
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},
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{
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Name: "duration",
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Type: cty.String,
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},
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},
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Type: function.StaticReturnType(cty.String),
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Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
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ts, err := time.Parse(time.RFC3339, args[0].AsString())
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if err != nil {
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return cty.UnknownVal(cty.String), err
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}
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duration, err := time.ParseDuration(args[1].AsString())
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if err != nil {
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return cty.UnknownVal(cty.String), err
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}
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return cty.StringVal(ts.Add(duration).Format(time.RFC3339)), nil
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},
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})
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// Timestamp returns a string representation of the current date and time.
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//
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// In the Terraform language, timestamps are conventionally represented as
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// strings using RFC 3339 "Date and Time format" syntax, and so timestamp
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// returns a string in this format.
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func Timestamp() (cty.Value, error) {
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return TimestampFunc.Call([]cty.Value{})
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}
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// TimeAdd adds a duration to a timestamp, returning a new timestamp.
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//
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// In the Terraform language, timestamps are conventionally represented as
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// strings using RFC 3339 "Date and Time format" syntax. Timeadd requires
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// the timestamp argument to be a string conforming to this syntax.
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//
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// `duration` is a string representation of a time difference, consisting of
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// sequences of number and unit pairs, like `"1.5h"` or `1h30m`. The accepted
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// units are `ns`, `us` (or `µs`), `"ms"`, `"s"`, `"m"`, and `"h"`. The first
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// number may be negative to indicate a negative duration, like `"-2h5m"`.
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//
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// The result is a string, also in RFC 3339 format, representing the result
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// of adding the given direction to the given timestamp.
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func TimeAdd(timestamp cty.Value, duration cty.Value) (cty.Value, error) {
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return TimeAddFunc.Call([]cty.Value{timestamp, duration})
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}
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