Created
July 26, 2016 16:52
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package configparser | |
import ( | |
"encoding/json" | |
"github.com/hashicorp/hcl/hcl/ast" | |
"github.com/hashicorp/hcl/hcl/token" | |
) | |
func NewMap(l *ast.ObjectList) *Map { | |
return &Map{ | |
ol: l, | |
} | |
} | |
type Map struct { | |
ol *ast.ObjectList | |
} | |
func (m *Map) Keys() []string { | |
var keys []string | |
for _, item := range m.ol.Items { | |
if len(item.Keys) != 1 { | |
continue | |
} | |
if item.Keys[0].Token.Text == "" { | |
continue | |
} | |
keys = append(keys, item.Keys[0].Token.Text) | |
} | |
return keys | |
} | |
func (m *Map) Get(key string) (ast.Node, bool) { | |
for _, item := range m.ol.Items { | |
if len(item.Keys) != 1 { | |
continue | |
} | |
if item.Keys[0].Token.Text == key { | |
return item.Val, true | |
} | |
} | |
return nil, false | |
} | |
func (m *Map) GetAll(key string) []ast.Node { | |
nodes := make([]ast.Node, 0) | |
for _, item := range m.ol.Items { | |
if len(item.Keys) != 1 { | |
continue | |
} | |
if item.Keys[0].Token.Text == key { | |
nodes = append(nodes, item.Val) | |
} | |
} | |
return nodes | |
} | |
func newval(val interface{}, line int) *ast.LiteralType { | |
// this should hopefully be a simple value like int, string. TODO actual | |
// switch(type) command | |
bits, err := json.Marshal(val) | |
if err != nil { | |
panic(err) | |
} | |
return &ast.LiteralType{ | |
Token: token.Token{ | |
Type: token.STRING, | |
Pos: token.Pos{ | |
Line: line, | |
}, | |
Text: string(bits), | |
}, | |
} | |
} | |
func (m *Map) Set(key string, val interface{}) { | |
set := false | |
for _, item := range m.ol.Items { | |
if len(item.Keys) != 1 { | |
continue | |
} | |
if item.Keys[0].Token.Text == key { | |
item.Val = newval(val, item.Assign.Line) | |
set = true | |
break | |
} | |
} | |
if !set { | |
lastItem := m.ol.Items[len(m.ol.Items)-1] | |
m.ol.Items = append(m.ol.Items, &ast.ObjectItem{ | |
Keys: []*ast.ObjectKey{ | |
{token.Token{ | |
Type: token.STRING, | |
Pos: token.Pos{ | |
Line: lastItem.Assign.Line + 1, | |
}, | |
Text: key, | |
}}, | |
}, | |
Assign: token.Pos{ | |
Line: lastItem.Assign.Line + 1, | |
}, | |
Val: newval(val, lastItem.Assign.Line+1), | |
}) | |
} | |
return | |
} |
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package configparser | |
import ( | |
"testing" | |
"github.com/letsencrypt/boulder/test" | |
"github.com/hashicorp/hcl" | |
"github.com/hashicorp/hcl/hcl/ast" | |
) | |
var configfile = ` | |
handler { | |
# this is a route | |
route = "/v1/hello_world" | |
/* | |
* this si a multiline comment | |
* about this handler */ | |
function_name = "Functionname" | |
foo = 3 | |
bar = 7 | |
blah = 8 | |
} | |
handler { | |
# this is a route | |
route = "/v1/hello_world" | |
/* | |
* this si a multiline comment | |
* about this handler */ | |
function_name = "Functionname" | |
}` | |
func TestGet(t *testing.T) { | |
f, err := hcl.ParseBytes([]byte(configfile)) | |
if err != nil { | |
t.Fatal(err) | |
} | |
// "An HCL file is an object list" so this should work | |
m := NewMap(f.Node.(*ast.ObjectList)) | |
node, found := m.Get("handler") | |
test.AssertEquals(t, found, true) | |
_, found = m.Get("unknown_key") | |
test.AssertEquals(t, found, false) | |
innerm := NewMap(node.(*ast.ObjectType).List) | |
node, found = innerm.Get("function_name") | |
test.AssertEquals(t, found, true) | |
lt, ok := node.(*ast.LiteralType) | |
test.Assert(t, ok, "converting to literal type") | |
test.AssertEquals(t, lt.Token.Text, "\"Functionname\"") | |
} | |
func TestGetAll(t *testing.T) { | |
f, err := hcl.ParseBytes([]byte(configfile)) | |
if err != nil { | |
t.Fatal(err) | |
} | |
// "An HCL file is an object list" so this should work | |
m := NewMap(f.Node.(*ast.ObjectList)) | |
nodes := m.GetAll("handler") | |
test.AssertEquals(t, len(nodes), 2) | |
nodes = m.GetAll("unknown_key") | |
test.AssertEquals(t, len(nodes), 0) | |
} |
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