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TODO: NewSliceIter helper? less confusion about reference or not make debug with Iter nicer Not a good idea to separate function/iterator? could wrap all functions as one value iterators but might impact performance? Keep track of path? currently iterator give 0 as path remove repl or add to cli?
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
|
|
||
| "github.com/itchyny/gojq" | ||
| ) | ||
|
|
||
| func read(c interface{}, a []interface{}) interface{} { | ||
| prompt, ok := a[0].(string) | ||
| if !ok { | ||
| return fmt.Errorf("%v: src is not a string", a[0]) | ||
| } | ||
| fmt.Fprint(os.Stdout, prompt) | ||
| s := bufio.NewScanner(os.Stdin) | ||
| if ok = s.Scan(); !ok { | ||
| fmt.Fprintln(os.Stdout) | ||
| return io.EOF | ||
| } | ||
|
|
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| return s.Text() | ||
| } | ||
|
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| func eval(c interface{}, a []interface{}) interface{} { | ||
| src, ok := a[0].(string) | ||
| if !ok { | ||
| return fmt.Errorf("%v: src is not a string", a[0]) | ||
| } | ||
| iter, err := replRun(c, src) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| return iter | ||
| } | ||
|
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| func print(c interface{}, a []interface{}) interface{} { | ||
| if _, err := fmt.Fprintln(os.Stdout, c); err != nil { | ||
| return err | ||
| } | ||
|
|
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| return gojq.EmptyIter{} | ||
| } | ||
|
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| func itertest(c interface{}, a []interface{}) interface{} { | ||
| return &gojq.SliceIter{Slice: []interface{}{1, 2, 3}} | ||
| } | ||
|
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| func itererr(c interface{}, a []interface{}) interface{} { | ||
| return &gojq.SliceIter{Slice: []interface{}{1, fmt.Errorf("itervaluerr")}} | ||
| } | ||
|
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| type preludeLoader struct{} | ||
|
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| func (preludeLoader) LoadInitModules() ([]*gojq.Query, error) { | ||
| replSrc := ` | ||
| def repl: | ||
| def _wrap: if (. | type) != "array" then [.] end; | ||
| def _repl: | ||
| try read("> ") as $e | | ||
| (try (.[] | eval($e)) catch . | print), | ||
| _repl; | ||
| _wrap | _repl; | ||
| ` | ||
| gq, err := gojq.Parse(replSrc) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return []*gojq.Query{gq}, nil | ||
| } | ||
|
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| func replRun(c interface{}, src string) (gojq.Iter, error) { | ||
| gq, err := gojq.Parse(src) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| gc, err := gojq.Compile(gq, | ||
| gojq.WithModuleLoader(preludeLoader{}), | ||
| gojq.WithFunction("read", 1, 1, read), | ||
| gojq.WithIterator("eval", 1, 1, eval), | ||
| gojq.WithIterator("print", 0, 0, print), | ||
|
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| gojq.WithIterator("itertest", 0, 0, itertest), | ||
| gojq.WithIterator("itererr", 0, 0, itererr), | ||
| ) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return gc.Run(c), nil | ||
| } | ||
|
|
||
| func main() { | ||
| expr := "repl" | ||
| if len(os.Args) > 1 { | ||
| expr = os.Args[1] | ||
| } | ||
| iter, err := replRun(nil, expr) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| for { | ||
| v, ok := iter.Next() | ||
| if !ok { | ||
| break | ||
| } else if err, ok := v.(error); ok { | ||
| fmt.Fprintf(os.Stderr, "err: %v\n", err) | ||
| break | ||
| } else if d, ok := v.([2]interface{}); ok { | ||
| fmt.Fprintf(os.Stdout, "%s: %v\n", d[0], d[1]) | ||
| } | ||
| } | ||
| } |
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