summaryrefslogtreecommitdiff
path: root/theMagicOfAutocomplete.go
blob: 8d78c6240a03bff336ea818002a9248fc89593b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
package prep

// This is where the actual autocomplete happens
// lots of the fun magic is in here

import (
	"errors"
	"os"
	"time"

	"go.wit.com/dev/alexflint/arg"
	"go.wit.com/lib/config"
	durationpb "google.golang.org/protobuf/types/known/durationpb"
	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
)

func Autocomplete(dest any) *Auto {
	myAuto = new(AutoArgs) // todo: redo this
	findAppInfo(dest)      // parses back to main() for argv info

	// load the argv history from the protobuf file
	all := NewAutos()
	err := config.LoadCache(all, "argv", myAuto.appName) // loads ~/.cache/argv/forge.pb
	if err != nil {
		// there is no history. do something here(?)
	}
	pb := parseArgv(myAuto.appName) // parses os.Args into a protobuf

	// not autocompleting. return go-arg & the application
	if !pb.IsAuto {
		// save the pb & history
		all.Clone(pb)
		errors.Join(err, all.Save())

		arg.Register(&argBash)
		myAuto.pp = arg.MustParse(dest)
		myAuto.err = err
		return pb
	}

	// user is trying to setup bash or zsh autocomplete
	if pb.SetupAuto {
		// --bash was passed. try to configure bash-completion
		MakeAutocompleteFiles(myAuto.appName)
		os.Exit(0)
	}

	// EVERYTHING PAST HERE IS FOR AUTOCOMPLETE
	// everything sent to STDOUT and STDERR matters past this point

	// set the start time of the binary
	now := time.Now()
	pb.Ctime = timestamppb.New(now)

	// set the duration since the last auto complete
	// find the last entry. this is dumb way to do it
	var last *Auto
	for found := range all.IterAll() {
		last = found
	}
	dur := time.Since(last.Ctime.AsTime())
	pb.Duration = durationpb.New(dur)

	if pb.Debug {
		// dump debug info
		pb.PrintDebug()
		all.PrintHistory()
	}

	// roll the autocomplete file
	if all.Len() > 15 {
		pb.Debugf("DEBUG: trim() history is over 100 len=%d vs new=%d", all.Len(), all.Len()-90)
		all.Autos = all.Autos[all.Len()-10:]
		// newall.Autos = all.Autos[0:10]
		// for _, found := range all.Autos[0:10] {
		// 	newall.Append(found)
		// }
	}

	pb.Debugf("WRITE DEBUG: write PB='%s' len(pb)=%d config.Save().err=%v", all.Filename, all.Len(), err)

	// turn on debugging if duration < 200 milliseconds
	dur = pb.Duration.AsDuration()
	if dur < time.Millisecond*200 {
		pb.Debug = true
		pb.Fast = true
	}

	arg.Register(&argBash)
	flags := []string{}
	for _, s := range pb.Argv {
		if s == "--autodebug" {
			continue
		}
		flags = append(flags, s)
	}
	// pb.Debug = true
	// pb.Debugf("DEBUG: MustParse(%v)", flags)
	myAuto.pp, err = arg.ParseFlags(flags, dest)
	if err != nil {
		pb.Debugf("DEBUG: Parse error: %v", err)
	}

	if myAuto.pp == nil {
		pb.Debugf("DEBUG: myAuto.pp == nil after ParseFlags()")
	} else {
		// pb.Debugf("DEBUG: myAuto.pp is ok after ParseFlags()")
	}

	// save now. this is near the end probably
	all.Clone(pb)
	errors.Join(err, all.Save())
	// this is a work in progress
	if pb.Last == "--gui" {
		pb.Debugf("DEBUG: last=%s found --gui", pb.Last)
		pb.Autocomplete2("andlabs gogui")
		os.Exit(0)
	} else {
		// pb.Debugf("DEBUG: NO MATCH last='%s' found key '%s' = %s", pb.Last, key, val)
	}

	if myAuto.autoFunc == nil {
		pb.SubCommand(pb.Argv...)
	} else {
		myAuto.autoFunc(pb) // run the autocomplete function the user made for their application
	}
	if pb.Debug {
		// TODO:
		// check here to see if there was any completion text sent
		// if not, send "reset bash newline\n" to cause bash to redraw PS1 for the user
	}
	os.Exit(0)
	return nil
}