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additional null checks in provisioners

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Now that provisioners for directly with the plugin API and cty data
types, we need to add a few null checks to catch invalid input that
would have otherwise been masked by the legacy SDK.
This commit is contained in:
James Bardin 2021-04-20 12:31:32 -04:00
parent fabdf0bea1
commit 7f571b5ebb
4 changed files with 105 additions and 4 deletions
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10
builtin/provisioners/local-exec/resource_provisioner.go
View File

@ -82,8 +82,10 @@ func (p *provisioner) ProvisionResource(req provisioners.ProvisionResourceReques
if !envVal.IsNull() {
for k, v := range envVal.AsValueMap() {
entry := fmt.Sprintf("%s=%s", k, v.AsString())
env = append(env, entry)
if !v.IsNull() {
entry := fmt.Sprintf("%s=%s", k, v.AsString())
env = append(env, entry)
}
}
}
@ -93,7 +95,9 @@ func (p *provisioner) ProvisionResource(req provisioners.ProvisionResourceReques
var cmdargs []string
if !intrVal.IsNull() && intrVal.LengthInt() > 0 {
for _, v := range intrVal.AsValueSlice() {
cmdargs = append(cmdargs, v.AsString())
if !v.IsNull() {
cmdargs = append(cmdargs, v.AsString())
}
}
} else {
if runtime.GOOS == "windows" {

46
builtin/provisioners/local-exec/resource_provisioner_test.go
View File

@ -1,6 +1,7 @@
package localexec
import (
"fmt"
"io/ioutil"
"os"
"strings"
@ -204,3 +205,48 @@ func TestResourceProvisioner_StopClose(t *testing.T) {
p.Stop()
p.Close()
}
func TestResourceProvisioner_nullsInOptionals(t *testing.T) {
output := cli.NewMockUi()
p := New()
schema := p.GetSchema().Provisioner
for i, cfg := range []cty.Value{
cty.ObjectVal(map[string]cty.Value{
"command": cty.StringVal("echo OK"),
"environment": cty.MapVal(map[string]cty.Value{
"FOO": cty.NullVal(cty.String),
}),
}),
cty.ObjectVal(map[string]cty.Value{
"command": cty.StringVal("echo OK"),
"environment": cty.NullVal(cty.Map(cty.String)),
}),
cty.ObjectVal(map[string]cty.Value{
"command": cty.StringVal("echo OK"),
"interpreter": cty.ListVal([]cty.Value{cty.NullVal(cty.String)}),
}),
cty.ObjectVal(map[string]cty.Value{
"command": cty.StringVal("echo OK"),
"interpreter": cty.NullVal(cty.List(cty.String)),
}),
cty.ObjectVal(map[string]cty.Value{
"command": cty.StringVal("echo OK"),
"working_dir": cty.NullVal(cty.String),
}),
} {
t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
cfg, err := schema.CoerceValue(cfg)
if err != nil {
t.Fatal(err)
}
// verifying there are no panics
p.ProvisionResource(provisioners.ProvisionResourceRequest{
Config: cfg,
UIOutput: output,
})
})
}
}

9
builtin/provisioners/remote-exec/resource_provisioner.go
View File

@ -128,6 +128,10 @@ func (p *provisioner) Close() error {
func generateScripts(inline cty.Value) ([]string, error) {
var lines []string
for _, l := range inline.AsValueSlice() {
if l.IsNull() {
return nil, errors.New("invalid null string in 'scripts'")
}
s := l.AsString()
if s == "" {
return nil, errors.New("invalid empty string in 'scripts'")
@ -169,11 +173,14 @@ func collectScripts(v cty.Value) ([]io.ReadCloser, error) {
if scriptList := v.GetAttr("scripts"); !scriptList.IsNull() {
for _, script := range scriptList.AsValueSlice() {
if script.IsNull() {
return nil, errors.New("invalid null string in 'script'")
}
s := script.AsString()
if s == "" {
return nil, errors.New("invalid empty string in 'script'")
}
scripts = append(scripts, script.AsString())
scripts = append(scripts, s)
}
}

44
builtin/provisioners/remote-exec/resource_provisioner_test.go
View File

@ -3,6 +3,7 @@ package remoteexec
import (
"bytes"
"context"
"fmt"
"io"
"log"
"testing"
@ -274,3 +275,46 @@ func TestResourceProvisioner_connectionRequired(t *testing.T) {
t.Fatalf("expected 'missing connection' error: got %q", got)
}
}
func TestResourceProvisioner_nullsInOptionals(t *testing.T) {
output := cli.NewMockUi()
p := New()
schema := p.GetSchema().Provisioner
for i, cfg := range []cty.Value{
cty.ObjectVal(map[string]cty.Value{
"script": cty.StringVal("echo"),
"inline": cty.NullVal(cty.List(cty.String)),
}),
cty.ObjectVal(map[string]cty.Value{
"inline": cty.ListVal([]cty.Value{
cty.NullVal(cty.String),
}),
}),
cty.ObjectVal(map[string]cty.Value{
"script": cty.NullVal(cty.String),
}),
cty.ObjectVal(map[string]cty.Value{
"scripts": cty.NullVal(cty.List(cty.String)),
}),
cty.ObjectVal(map[string]cty.Value{
"scripts": cty.ListVal([]cty.Value{
cty.NullVal(cty.String),
}),
}),
} {
t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
cfg, err := schema.CoerceValue(cfg)
if err != nil {
t.Fatal(err)
}
// verifying there are no panics
p.ProvisionResource(provisioners.ProvisionResourceRequest{
Config: cfg,
UIOutput: output,
})
})
}
}