A Go package to implement command-line flag parsing.
Questions tagged [go-flag]
20 questions
35
votes
5 answers
Process command line arguments in go test
Is there a way to get the command line arguments in go "tests",
When you call go test obviously your main is not run, so is there a way to process command line arguments,
One way would be to use the flags packages and check for the command line…
Ali
- 18,665
- 21
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24
votes
3 answers
Defining Independent FlagSets in GoLang
The Go documentation (http://golang.org/pkg/flag/) says:
The FlagSet type allows one to define independent sets of flags, such as to implement subcommands in a command-line interface.
I need this functionality but I can't figure out how to…
chowey
- 9,138
- 6
- 54
- 84
8
votes
2 answers
Golang flag: Ignore missing flag and parse multiple duplicate flags
I am new to Golang and I have been unable to find a solution to this problem using flag.
How can I use flag so my program can handle calls like these, where the -term flag may be present a variable number of times, including 0 times:
./myprogram -f…
matt
- 318
- 3
- 11
4
votes
1 answer
How to group subcommands using go_flags package?
I am using https://github.com/jessevdk/go-flags and trying to group the subcommands using the top-level option "group" in the struct field. But instead of grouping the subcommands, it actually groups the options in the subcommands. Here is my…
MC X
- 337
- 4
- 16
4
votes
1 answer
How do I extract only flagsets that are being set explicitly in the cli?
I am new to cobra and viper.
I wanted to know if there's a way to exclude flag values that aren't set by the user from cli. So my problem is, I have some optional flags in my cobra cmd that have default values. I wonder if there's a way to exclude…
dekauliya
- 1,303
- 2
- 15
- 26
3
votes
2 answers
How to reference go-flag IsSet, functional code example needed
New to Go, and having a basic conceptual problem (I think)...
Trying to use github.com/jessevdk/go-flags and have it mostly working. --help and whatnot are working fine, flags are being passed, etc.
I need to understand if a option was set via a…
Cassey
- 118
- 9
2
votes
1 answer
Golang flag package stops parsing when encountering a non-flag
The built-in flags package seems to break parsing upon encountering the first non-flag argument for a process. Consider this application:
package main
import (
"flag"
"fmt"
)
func main() {
alpha := flag.String("alpha", "", "the…
Thomas Hunter II
- 5,081
- 7
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- 54
2
votes
1 answer
How to use custom flag in tests (with `testify/suite`)
I want to add custom flags for my Go tests that use testify/suite. It looks like from this thread that it can only be in TestMain() (init() if it is before Go 1.13). However, with the testify/suite pacakge, TestMain() is not quite an option. I have…
cxc
- 201
- 2
- 10
2
votes
2 answers
Golang execute function using flags
How can I execute a specific function by entering a flag, for example, I have three flags:
wordPtr
numbPtr
forkPtr
And when executing a single one, the function that calls is executed:
.\data -wordPtr Test
When executing that flag,…
Oscar P
- 167
- 1
- 7
2
votes
1 answer
Check if all flags were set (no flags blank)
How do I make sure every flag argument was set from the command line? I would like to do this without checking each flag name specifically, and would like to instead check all flags dynamically.
Here is my code, main.go:
package main
import (
…
Noam Hacker
- 4,671
- 7
- 34
- 55
2
votes
1 answer
Raise custom error in command-line parsing
I'm using the flag module to parse my flags, but want to have at least one positional argument. How do I show the usage help when not enough positional arguments are present, as I would in python with parser.error?
Currently, I am manually calling…
phihag
- 278,196
- 72
- 453
- 469
1
vote
1 answer
How do i open all files of the format "test*.txt" in golang
If I give a flag (in golang) as 'test*.txt' (as a CLI argument), I need to open all files of the said format (example: test.txt, test1.txt, test2.txt).
I am thinking of doing a regex match with all the files present in the folder. Is there a better…
hrsh
- 108
- 5
1
vote
0 answers
Add mulitple commands with go-flags
Working with jessevdk/go-flags, I would like to get the following usage command:
./main [OPTIONS] arg1 [arg2]
I am able to get the OPTIONS right but I cannot add commands. I see that I can use AddCommand but I have not been able to generate my…
Arkon
- 2,648
- 6
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1
vote
1 answer
value returned by flags into my struct
How can I assign the string value returned by flag into my struct? I have the following code.
destDbCfg = &dbhelper.DbConfig {}
destDbCfg.Database = flag.String( "destDBName", "", "Destination DB Database Name")
flag.Parse()
Database is a string
buildmaestro
- 1,386
- 5
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1
vote
0 answers
Global go-flag AddCommand clarification and/or example
In my early days of learning Go and trying to use package github.com/jessevdk/go-flags. I checked the Fly example referenced in another go-flags thread, but it apparently does not use AddCommand (at least per my grep).
The godoc article recommends…
Cassey
- 118
- 9