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author | appilon <apilon@hashicorp.com> | 2019-02-27 16:43:31 -0500 |
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committer | GitHub <noreply@github.com> | 2019-02-27 16:43:31 -0500 |
commit | 844b5a68d8af4791755b8f0ad293cc99f5959183 (patch) | |
tree | 255c250a5c9d4801c74092d33b7337d8c14438ff /vendor/github.com/mitchellh/cli/ui.go | |
parent | 303b299eeb6b06e939e35905e4b34cb410dd9dc3 (diff) | |
parent | 15c0b25d011f37e7c20aeca9eaf461f78285b8d9 (diff) | |
download | terraform-provider-statuscake-844b5a68d8af4791755b8f0ad293cc99f5959183.tar.gz terraform-provider-statuscake-844b5a68d8af4791755b8f0ad293cc99f5959183.tar.zst terraform-provider-statuscake-844b5a68d8af4791755b8f0ad293cc99f5959183.zip |
Merge pull request #27 from terraform-providers/go-modules-2019-02-22
[MODULES] Switch to Go Modules
Diffstat (limited to 'vendor/github.com/mitchellh/cli/ui.go')
-rw-r--r-- | vendor/github.com/mitchellh/cli/ui.go | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/vendor/github.com/mitchellh/cli/ui.go b/vendor/github.com/mitchellh/cli/ui.go new file mode 100644 index 0000000..a2d6f94 --- /dev/null +++ b/vendor/github.com/mitchellh/cli/ui.go | |||
@@ -0,0 +1,187 @@ | |||
1 | package cli | ||
2 | |||
3 | import ( | ||
4 | "bufio" | ||
5 | "errors" | ||
6 | "fmt" | ||
7 | "io" | ||
8 | "os" | ||
9 | "os/signal" | ||
10 | "strings" | ||
11 | |||
12 | "github.com/bgentry/speakeasy" | ||
13 | "github.com/mattn/go-isatty" | ||
14 | ) | ||
15 | |||
16 | // Ui is an interface for interacting with the terminal, or "interface" | ||
17 | // of a CLI. This abstraction doesn't have to be used, but helps provide | ||
18 | // a simple, layerable way to manage user interactions. | ||
19 | type Ui interface { | ||
20 | // Ask asks the user for input using the given query. The response is | ||
21 | // returned as the given string, or an error. | ||
22 | Ask(string) (string, error) | ||
23 | |||
24 | // AskSecret asks the user for input using the given query, but does not echo | ||
25 | // the keystrokes to the terminal. | ||
26 | AskSecret(string) (string, error) | ||
27 | |||
28 | // Output is called for normal standard output. | ||
29 | Output(string) | ||
30 | |||
31 | // Info is called for information related to the previous output. | ||
32 | // In general this may be the exact same as Output, but this gives | ||
33 | // Ui implementors some flexibility with output formats. | ||
34 | Info(string) | ||
35 | |||
36 | // Error is used for any error messages that might appear on standard | ||
37 | // error. | ||
38 | Error(string) | ||
39 | |||
40 | // Warn is used for any warning messages that might appear on standard | ||
41 | // error. | ||
42 | Warn(string) | ||
43 | } | ||
44 | |||
45 | // BasicUi is an implementation of Ui that just outputs to the given | ||
46 | // writer. This UI is not threadsafe by default, but you can wrap it | ||
47 | // in a ConcurrentUi to make it safe. | ||
48 | type BasicUi struct { | ||
49 | Reader io.Reader | ||
50 | Writer io.Writer | ||
51 | ErrorWriter io.Writer | ||
52 | } | ||
53 | |||
54 | func (u *BasicUi) Ask(query string) (string, error) { | ||
55 | return u.ask(query, false) | ||
56 | } | ||
57 | |||
58 | func (u *BasicUi) AskSecret(query string) (string, error) { | ||
59 | return u.ask(query, true) | ||
60 | } | ||
61 | |||
62 | func (u *BasicUi) ask(query string, secret bool) (string, error) { | ||
63 | if _, err := fmt.Fprint(u.Writer, query+" "); err != nil { | ||
64 | return "", err | ||
65 | } | ||
66 | |||
67 | // Register for interrupts so that we can catch it and immediately | ||
68 | // return... | ||
69 | sigCh := make(chan os.Signal, 1) | ||
70 | signal.Notify(sigCh, os.Interrupt) | ||
71 | defer signal.Stop(sigCh) | ||
72 | |||
73 | // Ask for input in a go-routine so that we can ignore it. | ||
74 | errCh := make(chan error, 1) | ||
75 | lineCh := make(chan string, 1) | ||
76 | go func() { | ||
77 | var line string | ||
78 | var err error | ||
79 | if secret && isatty.IsTerminal(os.Stdin.Fd()) { | ||
80 | line, err = speakeasy.Ask("") | ||
81 | } else { | ||
82 | r := bufio.NewReader(u.Reader) | ||
83 | line, err = r.ReadString('\n') | ||
84 | } | ||
85 | if err != nil { | ||
86 | errCh <- err | ||
87 | return | ||
88 | } | ||
89 | |||
90 | lineCh <- strings.TrimRight(line, "\r\n") | ||
91 | }() | ||
92 | |||
93 | select { | ||
94 | case err := <-errCh: | ||
95 | return "", err | ||
96 | case line := <-lineCh: | ||
97 | return line, nil | ||
98 | case <-sigCh: | ||
99 | // Print a newline so that any further output starts properly | ||
100 | // on a new line. | ||
101 | fmt.Fprintln(u.Writer) | ||
102 | |||
103 | return "", errors.New("interrupted") | ||
104 | } | ||
105 | } | ||
106 | |||
107 | func (u *BasicUi) Error(message string) { | ||
108 | w := u.Writer | ||
109 | if u.ErrorWriter != nil { | ||
110 | w = u.ErrorWriter | ||
111 | } | ||
112 | |||
113 | fmt.Fprint(w, message) | ||
114 | fmt.Fprint(w, "\n") | ||
115 | } | ||
116 | |||
117 | func (u *BasicUi) Info(message string) { | ||
118 | u.Output(message) | ||
119 | } | ||
120 | |||
121 | func (u *BasicUi) Output(message string) { | ||
122 | fmt.Fprint(u.Writer, message) | ||
123 | fmt.Fprint(u.Writer, "\n") | ||
124 | } | ||
125 | |||
126 | func (u *BasicUi) Warn(message string) { | ||
127 | u.Error(message) | ||
128 | } | ||
129 | |||
130 | // PrefixedUi is an implementation of Ui that prefixes messages. | ||
131 | type PrefixedUi struct { | ||
132 | AskPrefix string | ||
133 | AskSecretPrefix string | ||
134 | OutputPrefix string | ||
135 | InfoPrefix string | ||
136 | ErrorPrefix string | ||
137 | WarnPrefix string | ||
138 | Ui Ui | ||
139 | } | ||
140 | |||
141 | func (u *PrefixedUi) Ask(query string) (string, error) { | ||
142 | if query != "" { | ||
143 | query = fmt.Sprintf("%s%s", u.AskPrefix, query) | ||
144 | } | ||
145 | |||
146 | return u.Ui.Ask(query) | ||
147 | } | ||
148 | |||
149 | func (u *PrefixedUi) AskSecret(query string) (string, error) { | ||
150 | if query != "" { | ||
151 | query = fmt.Sprintf("%s%s", u.AskSecretPrefix, query) | ||
152 | } | ||
153 | |||
154 | return u.Ui.AskSecret(query) | ||
155 | } | ||
156 | |||
157 | func (u *PrefixedUi) Error(message string) { | ||
158 | if message != "" { | ||
159 | message = fmt.Sprintf("%s%s", u.ErrorPrefix, message) | ||
160 | } | ||
161 | |||
162 | u.Ui.Error(message) | ||
163 | } | ||
164 | |||
165 | func (u *PrefixedUi) Info(message string) { | ||
166 | if message != "" { | ||
167 | message = fmt.Sprintf("%s%s", u.InfoPrefix, message) | ||
168 | } | ||
169 | |||
170 | u.Ui.Info(message) | ||
171 | } | ||
172 | |||
173 | func (u *PrefixedUi) Output(message string) { | ||
174 | if message != "" { | ||
175 | message = fmt.Sprintf("%s%s", u.OutputPrefix, message) | ||
176 | } | ||
177 | |||
178 | u.Ui.Output(message) | ||
179 | } | ||
180 | |||
181 | func (u *PrefixedUi) Warn(message string) { | ||
182 | if message != "" { | ||
183 | message = fmt.Sprintf("%s%s", u.WarnPrefix, message) | ||
184 | } | ||
185 | |||
186 | u.Ui.Warn(message) | ||
187 | } | ||