jf

jf "jf: %q" "JSON Format"

jf is a jo alternative to help safely format and print JSON objects in the commandline.

However, unlike jo, where you build the JSON object by nesting jo outputs, jf works similar to printf, i.e. it expects the template in YAML format as the first argument, and then the values for the placeholders as subsequent arguments.

Install

cargo install jf

Or download binary from the latest release.

Usage

jf TEMPLATE [VALUE]...

Where TEMPLATE may contain the following placeholders:

• %q: Placeholder for quoted and safely escaped JSON string.
• %s: Placeholder for JSON values other than string.

And [VALUE]... are the values for the placeholders.

Use %% to escape a literal % character.

Example:

jf "hello: %q" world
# jo hello=world
# {"hello":"world"}

jf "hello: {beautiful: %q}" world
# jo hello=$(jo beautiful=world)
# {"hello":{"beautiful":"world"}}

jf "d: {m: %s, n: %s}" 10 20
# jo d[m]=10 d[n]=20
# {"d":{"m":10,"n":20}}

jf "{a: {b: %s, c: {d: %s, f: %s}, d: {e: [%s, %q]}}, b: {e: [%q]}}" 0 1 true 2 sam hi
# jo -d\|first_char_only a\|b=0 a\|c\|d=1 a\|d\|e[]=2 a\|d\|e[]=sam a\|c[f]@1 b\|e[]g=hi
# {"a":{"b":0,"c":{"d":1,"f":true},"d":{"e":[2,"sam"]}},"b":{"e":["hi"]}}