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Command Reference: g

Glob pattern matching for file system objects (eg *.txt)

Description

Returns a list of files and directories that match a glob pattern.

Output is a JSON list.

Usage

g: pattern -> <stdout>

Examples

# inline globbing
cat: @{ g: *.txt }

# writing a JSON array of files to disk
g: *.txt -> > filelist.json

# writing a list of files to disk
g: *.txt -> format str -> > filelist.txt

# checking if a file exists
if { g: somefile.txt } then {
    # file exists
}

# checking if a file does not exist
!if { g: somefile.txt } then {
    # file does not exist
}

Detail

Pattern reference

• * matches any number of (including zero) characters
• ? matches any single character

Auto-globbing

Any command prefixed with @g will be auto-globbed. For example, the two following commands will produce the same output:

» ls @{g: *.go}
benchmarks_test.go  defaults_test.go  flags.go  godoc.go  main.go  murex_test.go

» @g ls *.go
benchmarks_test.go  defaults_test.go  flags.go  godoc.go  main.go  murex_test.go

The rational behind the ugly @g syntax is simply to make one-liners a bit less painful when coming from more traditional POSIX-like shells (eg Bash) where wildcards are automatically expanded. So if you type ls * (for example) then realise you've forgotten to subshell, you can just recall the last command with auto-globbing enabled:

@g ^!!

Synonyms

• g
• @g

See Also

• commands/f: Lists objects (eg files) in the current working directory
• commands/rx: Regexp pattern matching for file system objects (eg '.*.txt')