This command allows you to modify data at a given selector.
Dasel will create any data items that do not already exist allowing you to create entire data structures from nothing.


dasel put <type> -f <file> <selector> <value>
If --file is used without --out then the source file will be updated.
The type of value you want to put.
Available arguments:
-v, --value
The value to write.
Dasel will parse this value as a string, int, or bool from this value depending on the given type.
If no -v, --value flag is given, the value is assumed to be the last argument.
This is required.
-f, --file
Specify the file to query. This is required unless you are piping in data.
If piping in data you can optionally pass -f stdin/-f -.
-o, --out
Specify the output file. If present, results will be written to the given file. If not present, results will be written to the input file (or stdout if none given).
To force output to be written to stdout, pass -o stdoutor-o -.
-r, --read
Specify the parser to use when reading the input data.
This is required if you are piping in data, otherwise dasel will use the given file extension to guess which parser to use.
-w, --write
Specify the parser to use when writing the output data.
If not provided dasel will attempt to use the --out and --read flags to determine which parser to use.
-p, --parser
Shorthand for -r <value> -w <value>
-m, --multiple
Tells dasel to put multiple items.
-s, --selector, <selector>
Specify the selector to use. See selectors for more information.
If no selector flag is given, dasel assumes the first argument given is the selector.
This is required.
By default, dasel formats the output using the specified parser.
If this flag is used no formatting occurs and the results output as a string.
-c, --compact
This tells dasel to output compact data where possible. E.g. not pretty printing JSON.


Put string

$ echo "name: Tom" | ./dasel put string -p yaml ".name" Jim
name: Jim

Create documents from scratch

You can pipe multiple dasel commands together in order to build entire documents or make multiple changes:
$ echo '' |
dasel put string -p yaml '.servers.[].bind_dn' 'x' |
dasel put string -p yaml -m '.servers.[*].attributes.name' 'y' |
dasel put string -p yaml -m '.servers.[*].group_mappings.[].group_dn' 'a' |
dasel put string -p yaml -m '.servers.[*].group_mappings.[].group_dn' 'b'
- attributes:
name: "y"
bind_dn: x
- group_dn: a
- group_dn: b