2 releases
0.1.2 | Sep 23, 2022 |
---|---|
0.1.1 | Sep 22, 2022 |
#1936 in Command line utilities
83KB
1.5K
SLoC
tomq
tomq is a simple tool that converts TOML to JSON and JSON to TOML.
Table of Contents
Installation
Nix and NixOS
Release
nix-env -f https://gitlab.com/Kores/tomq/-/archive/master/tomq-master.tar.bz2 -i tomq
Development
nix-env -f https://gitlab.com/Kores/tomq/-/archive/master/tomq-master.tar.bz2 -i tomq-bleeding
Additional packages
You may also want to install jq
and bat
:
nix-env -iA nixpkgs.jq nixpkgs.bat
They are not required in order to convert from TOML to JSON and vice versa,
but jq is required for filtering and bat is required for the --bat
option.
Shell
You can easily try tomq with jq and bat using nix-shell
:
nix-shell https://gitlab.com/Kores/tomq/-/archive/shell/tomq-shell.tar.bz2
Cargo
Release
cargo install tomq
Development
cargo install --git https://gitlab.com/Kores/tomq.git
Other distros
tomq was recently released, I'm still cleaning up the code and haven't had time to package it for other distros. Once I feel comfortable, I will first submit it to nixpkgs and then start packaging it for other distros.
Examples
TOML to JSON
sh (and compatibles, like tcsh/csh/zsh/bash):
cat <<EOF | tomq
title = "tomq example"
description = "tomq is extraordinary"
EOF
fish:
printf %s\n 'title = "tomq example"' 'description = "tomq is extraordinary"' | tomq
nushell:
'
title = "tomq example"
description = "tomq is extraordinary"
' | tomq
Extra
Converts all Cargo.toml
files to JSON format by streaming the contents from the files
and piping to jq on demand.
fd -0 'Cargo.toml' | xargs -r0 tomq --input-files
jq filtering
requires jq
binary to be installed and available in the PATH (or any default location)
Applies a jq filter and outputs the JSON format.
tomq '.package' Cargo.toml
Re-trasconding to TOML
tomq -R '.package' Cargo.toml
Converting JSON to TOML
echo -ne '{"package": {"name": "tomq"}}' | tomq -T
Converting JSON to TOML (multi-document)
Converts from JSON to TOML using multi-document extension (non TOML spec compliant).
echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}' | tomq -T
This is not compliant to the TOML specification, but preserves the original JSON structure.
Converting JSON to TOML (common key)
Converts from JSON to TOML using a common key (TOML spec compliant).
echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}' | tomq -T -U packages
Note
This is compliant to the TOML specification, but changes the JSON structure, which can be recovered using jq:
echo -ne '{"package": {"name": "tomq", "version": "1.0.0"}}{"package": {"name": "tomq2", "version": "2.0.0"}}' | tomq -T -U packages | tomq '.packages[]'
Handling null
values
Turn null
values into empty documents:
echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}{"foo": "bar"}' | jq '.package' | tomq -T -E
Note
And even with the fact that tomq moslty preserves the original JSON structure, TOML doesn't have a sense of null values, so turning the previous output back to JSON will result in an empty object:
❯ echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}{"foo": "bar"}' | jq '.package'
{
"name": "tomq"
}
{
"name": "tomq2"
}
null
❯ echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}{"foo": "bar"}' | jq '.package' | tomq -T -E
name = "tomq"
---
name = "tomq2"
---
❯ echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}{"foo": "bar"}' | jq '.package' | tomq -T -E | tomq
{
"name": "tomq"
}
{
"name": "tomq2"
}
{}⏎
Providing a fallback key
For cases where the JSON output is not an object:
❯ echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}' | jq '.package.name'
"tomq"
"tomq2"
❯ echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}' | jq '.package.name' | tomq -T -K names
names = "tomq"
---
names = "tomq2"
In case there are null
values, TOML can't represent them, so you will need the -E
flag:
❯ echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}{"foo": "bar"}' | jq '.package.name'
"tomq"
"tomq2"
null
❯ echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}{"foo": "bar"}' | jq '.package.name' | tomq -T -E -K names
names = "tomq"
---
names = "tomq2"
---
-U
may also be handy in those cases:
❯ echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}' | jq '.package.name' | tomq -T -E -K value -U names
[[names]]
value = "tomq"
[[names]]
value = "tomq2"
❯ echo -ne '{"package": {"name": "tomq"}}{"package": {"name": "tomq2"}}' | jq '.package.name' | tomq -T -E -K value -U names | tomq '.names[].value'
"tomq"
"tomq2"
Dependencies
~3.5–4.5MB
~91K SLoC