feat(templater) Add a template function to insert surrounding repo's Git hash
A template function has been added that allows one to template the Git hash of the surrounding repo. This is useful to be able to inspect the deployment revision of an object in Kubernetes.
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@ -75,6 +75,7 @@ Some template functions come from Go's standard library and are listed in the
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available in kontemplate, as well as three custom functions:
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* `json`: Encodes any supplied data structure as JSON.
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* `gitHEAD`: Retrieves the commit hash at Git `HEAD`.
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* `passLookup`: Looks up the supplied key in [pass][].
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* `insertFile`: Insert the contents of the given file in the resource
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set folder as a string.
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@ -96,6 +97,9 @@ certKeyPath: my-website/cert-key
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{{ .certKeyPath | passLookup }}
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-> Returns content of 'my-website/cert-key' from pass
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{{ gitHEAD }}
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-> Returns the Git commit hash at HEAD.
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```
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## Conditionals & ranges
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@ -15,6 +15,7 @@ import (
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path"
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"strings"
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"text/template"
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@ -169,6 +170,14 @@ func templateFuncs(rs *context.ResourceSet) template.FuncMap {
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return string(b)
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}
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m["passLookup"] = GetFromPass
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m["gitHEAD"] = func() (string, error) {
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out, err := exec.Command("sh", "-c", "git rev-parse HEAD").Output()
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if err != nil {
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return "", err
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}
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output := strings.TrimSpace(string(out))
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return output, nil
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}
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m["lookupIPAddr"] = GetIPsFromDNS
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m["insertFile"] = func(file string) (string, error) {
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data, err := ioutil.ReadFile(path.Join(rs.Path, file))
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