Partials with params

[fidian]

Split from #28 by @sc0ttj:

Does the following (or something similar) work in mo? ..

{{>some_partial
  param1="one"
  param2=2
  param3="$some_shell_var"
  param4="{{some_var_or_func}}"
}}

...I have some snippets lying around which nearly make it work with params as strings, but it's not working yet, and I didn't actually test mo itself to see if the above, or something similar, is supported..

[fidian]

No, it does not. I don't have a tokenizer or a bash syntax parser that would allow this, especially for param4.

[fidian]

Leaving this one open because it's a wonderful idea.

[sc0ttj]

Leaving this here, as this is still very much something I am interested in implementing:

NOTE: The following would be good enough (slightly easier than original example):

{{>some_partial
  param1="one"
  param2="2"
  param3="$some_shell_var"
}}

Below is some code that might help... (Obviously this code needs fixing up, making faster, removing hard-coded dir stuff, but gives an idea of what I might be able to implement)

Suggestions, improvements and alternatives are welcome!

#!/bin/bash

# A shell function for `mo` - it adds support for mustache partials,
# with support for passing paramters to `mo`, for custom output.


# TDLR: this function replaces
#
#    {{>foo param1=bar param2=baz}}
#
# with
#
#    param1=bar param2=baz ${PARTIAL_DIR:-$PWD}/templates/_foo.mustache | mo
#
# It should be used inside `mo`, just before it parses the partial file - if params 
# given, run/eval the command generated by the `process_partial` func below 
# instead of the usual partial processing 

# If $PARTIAL_DIR is not set, the current working directory ($PWD) is where
# the function will look for partial files.


# Usage:
#
#    process_partial {{>page-header title="bar" desc="one" three="3"}}


process_partial() {
  local partial="$(echo "$@" | cut -f1 -d ' '   | sed 's/{{>//')"

  if [ ! -f ${PARTIAL_DIR:-$PWD}/templates/_${partial}.mustache ];then
    echo "Error: partial file '${partial}.mustache' not found in: "
    echo "${PARTIAL_DIR:-$PWD}/templates"
    echo
    return 1
  fi

  local params="$(echo  "$@" | cut -f2-  -d' ' | sed "s/}}$//")"

  source `which mo`

  ${params} cat ${PARTIAL_DIR:-$PWD}/templates/_${partial}.mustache | mo
}