1107 lines
32 KiB
Plaintext
1107 lines
32 KiB
Plaintext
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#!/usr/bin/env bash
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#
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#/ Mo is a mustache template rendering software written in bash. It inserts
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#/ environment variables into templates.
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#/
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#/ Simply put, mo will change {{VARIABLE}} into the value of that
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#/ environment variable. You can use {{#VARIABLE}}content{{/VARIABLE}} to
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#/ conditionally display content or iterate over the values of an array.
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#/
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#/ Learn more about mustache templates at https://mustache.github.io/
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#/
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#/ Simple usage:
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#/
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#/ mo [OPTIONS] filenames...
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#/
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#/ Options:
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#/
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#/ -u, --fail-not-set
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#/ Fail upon expansion of an unset variable.
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#/ -x, --fail-on-function
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#/ Fail when a function returns a non-zero status code.
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#/ -e, --false
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#/ Treat the string "false" as empty for conditionals.
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#/ -h, --help
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#/ This message.
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#/ -s=FILE, --source=FILE
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#/ Load FILE into the environment before processing templates.
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#/ Can be used multiple times.
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#
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# Mo is under a MIT style licence with an additional non-advertising clause.
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# See LICENSE.md for the full text.
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#
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# This is open source! Please feel free to contribute.
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#
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# https://github.com/tests-always-included/mo
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# Public: Template parser function. Writes templates to stdout.
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#
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# $0 - Name of the mo file, used for getting the help message.
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# $@ - Filenames to parse.
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#
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# Options:
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#
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# --allow-function-arguments
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#
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# Permit functions in templates to be called with additional arguments. This
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# puts template data directly in to the path of an eval statement. Use with
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# caution. Not listed in the help because it only makes sense when mo is
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# sourced.
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#
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# -u, --fail-not-set
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#
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# Fail upon expansion of an unset variable. Default behavior is to silently
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# ignore and expand into empty string.
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#
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# -x, --fail-on-function
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#
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# Fail when a function used by a template returns an error status code.
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# Alternately, ou may set the MO_FAIL_ON_FUNCTION environment variable to a
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# non-empty value to enable this behavior.
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#
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# -e, --false
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#
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# Treat "false" as an empty value. You may set the MO_FALSE_IS_EMPTY
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# environment variable instead to a non-empty value to enable this behavior.
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#
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# -h, --help
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#
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# Display a help message.
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#
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# -s=FILE, --source=FILE
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#
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# Source a file into the environment before processing template files.
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# This can be used multiple times.
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#
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# --
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#
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# Used to indicate the end of options. You may optionally use this when
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# filenames may start with two hyphens.
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#
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# Mo uses the following environment variables:
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#
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# MO_ALLOW_FUNCTION_ARGUMENTS - When set to a non-empty value, this allows
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# functions referenced in templates to receive additional
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# options and arguments. This puts the content from the
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# template directly into an eval statement. Use with extreme
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# care.
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# MO_FUNCTION_ARGS - Arguments passed to the function
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# MO_FAIL_ON_FUNCTION - If a function returns a non-zero status code, abort
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# with an error.
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# MO_FAIL_ON_UNSET - When set to a non-empty value, expansion of an unset env
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# variable will be aborted with an error.
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# MO_FALSE_IS_EMPTY - When set to a non-empty value, the string "false" will be
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# treated as an empty value for the purposes of conditionals.
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# MO_ORIGINAL_COMMAND - Used to find the `mo` program in order to generate a
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# help message.
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#
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# Returns nothing.
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mo() (
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# This function executes in a subshell so IFS is reset.
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# Namespace this variable so we don't conflict with desired values.
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local moContent f2source files doubleHyphens
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IFS=$' \n\t'
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files=()
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doubleHyphens=false
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if [[ $# -gt 0 ]]; then
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for arg in "$@"; do
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if $doubleHyphens; then
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#: After we encounter two hyphens together, all the rest
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#: of the arguments are files.
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files=("${files[@]}" "$arg")
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else
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case "$arg" in
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-h|--h|--he|--hel|--help|-\?)
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moUsage "$0"
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exit 0
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;;
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--allow-function-arguments)
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# shellcheck disable=SC2030
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MO_ALLOW_FUNCTION_ARGUMENTS=true
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;;
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-u | --fail-not-set)
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# shellcheck disable=SC2030
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MO_FAIL_ON_UNSET=true
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;;
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-x | --fail-on-function)
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# shellcheck disable=SC2030
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MO_FAIL_ON_FUNCTION=true
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;;
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-e | --false)
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# shellcheck disable=SC2030
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MO_FALSE_IS_EMPTY=true
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;;
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-s=* | --source=*)
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if [[ "$arg" == --source=* ]]; then
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f2source="${arg#--source=}"
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else
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f2source="${arg#-s=}"
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fi
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if [[ -f "$f2source" ]]; then
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# shellcheck disable=SC1090
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. "$f2source"
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else
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echo "No such file: $f2source" >&2
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exit 1
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fi
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;;
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--)
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#: Set a flag indicating we've encountered double hyphens
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doubleHyphens=true
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;;
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*)
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#: Every arg that is not a flag or a option should be a file
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files=(${files[@]+"${files[@]}"} "$arg")
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;;
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esac
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fi
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done
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fi
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moGetContent moContent "${files[@]}" || return 1
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moParse "$moContent" "" true
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)
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# Internal: Call a function.
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#
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# $1 - Variable for output
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# $2 - Function to call
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# $3 - Content to pass
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# $4 - Additional arguments as a single string
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#
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# This can be dangerous, especially if you are using tags like
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# {{someFunction ; rm -rf / }}
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#
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# Returns nothing.
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moCallFunction() {
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local moArgs moContent moFunctionArgs moFunctionResult
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moArgs=()
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moTrimWhitespace moFunctionArgs "$4"
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# shellcheck disable=SC2031
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if [[ -n "${MO_ALLOW_FUNCTION_ARGUMENTS-}" ]]; then
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# Intentionally bad behavior
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# shellcheck disable=SC2206
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moArgs=($4)
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fi
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moContent=$(echo -n "$3" | MO_FUNCTION_ARGS="$moFunctionArgs" eval "$2" "${moArgs[@]}") || {
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moFunctionResult=$?
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# shellcheck disable=SC2031
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if [[ -n "${MO_FAIL_ON_FUNCTION-}" && "$moFunctionResult" != 0 ]]; then
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echo "Function '$2' with args (${moArgs[*]+"${moArgs[@]}"}) failed with status code $moFunctionResult"
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exit "$moFunctionResult"
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fi
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}
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# shellcheck disable=SC2031
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local "$1" && moIndirect "$1" "$moContent"
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}
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# Internal: Scan content until the right end tag is found. Creates an array
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# with the following members:
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#
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# [0] = Content before end tag
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# [1] = End tag (complete tag)
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# [2] = Content after end tag
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#
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# Everything using this function uses the "standalone tags" logic.
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#
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# $1 - Name of variable for the array
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# $2 - Content
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# $3 - Name of end tag
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# $4 - If -z, do standalone tag processing before finishing
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#
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# Returns nothing.
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moFindEndTag() {
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local content remaining scanned standaloneBytes tag
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#: Find open tags
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scanned=""
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moSplit content "$2" '{{' '}}'
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while [[ "${#content[@]}" -gt 1 ]]; do
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moTrimWhitespace tag "${content[1]}"
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#: Restore content[1] before we start using it
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content[1]='{{'"${content[1]}"'}}'
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case $tag in
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'#'* | '^'*)
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#: Start another block
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scanned="${scanned}${content[0]}${content[1]}"
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moTrimWhitespace tag "${tag:1}"
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moFindEndTag content "${content[2]}" "$tag" "loop"
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scanned="${scanned}${content[0]}${content[1]}"
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remaining=${content[2]}
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;;
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'/'*)
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#: End a block - could be ours
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moTrimWhitespace tag "${tag:1}"
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scanned="$scanned${content[0]}"
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if [[ "$tag" == "$3" ]]; then
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#: Found our end tag
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if [[ -z "${4-}" ]] && moIsStandalone standaloneBytes "$scanned" "${content[2]}" true; then
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#: This is also a standalone tag - clean up whitespace
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#: and move those whitespace bytes to the "tag" element
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# shellcheck disable=SC2206
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standaloneBytes=( $standaloneBytes )
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content[1]="${scanned:${standaloneBytes[0]}}${content[1]}${content[2]:0:${standaloneBytes[1]}}"
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scanned="${scanned:0:${standaloneBytes[0]}}"
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content[2]="${content[2]:${standaloneBytes[1]}}"
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fi
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local "$1" && moIndirectArray "$1" "$scanned" "${content[1]}" "${content[2]}"
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return 0
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fi
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scanned="$scanned${content[1]}"
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remaining=${content[2]}
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;;
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*)
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#: Ignore all other tags
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scanned="${scanned}${content[0]}${content[1]}"
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remaining=${content[2]}
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;;
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esac
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moSplit content "$remaining" '{{' '}}'
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done
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#: Did not find our closing tag
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scanned="$scanned${content[0]}"
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local "$1" && moIndirectArray "$1" "${scanned}" "" ""
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}
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# Internal: Find the first index of a substring. If not found, sets the
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# index to -1.
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#
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# $1 - Destination variable for the index
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# $2 - Haystack
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# $3 - Needle
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#
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# Returns nothing.
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moFindString() {
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local pos string
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string=${2%%$3*}
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[[ "$string" == "$2" ]] && pos=-1 || pos=${#string}
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local "$1" && moIndirect "$1" "$pos"
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}
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# Internal: Generate a dotted name based on current context and target name.
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#
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# $1 - Target variable to store results
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# $2 - Context name
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# $3 - Desired variable name
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#
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# Returns nothing.
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moFullTagName() {
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if [[ -z "${2-}" ]] || [[ "$2" == *.* ]]; then
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local "$1" && moIndirect "$1" "$3"
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else
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local "$1" && moIndirect "$1" "${2}.${3}"
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fi
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}
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# Internal: Fetches the content to parse into a variable. Can be a list of
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# partials for files or the content from stdin.
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#
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# $1 - Variable name to assign this content back as
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# $2-@ - File names (optional)
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#
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# Returns nothing.
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moGetContent() {
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local moContent moFilename moTarget
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moTarget=$1
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shift
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if [[ "${#@}" -gt 0 ]]; then
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moContent=""
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for moFilename in "$@"; do
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#: This is so relative paths work from inside template files
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moContent="$moContent"'{{>'"$moFilename"'}}'
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done
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else
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moLoadFile moContent || return 1
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fi
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local "$moTarget" && moIndirect "$moTarget" "$moContent"
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}
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# Internal: Indent a string, placing the indent at the beginning of every
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# line that has any content.
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#
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# $1 - Name of destination variable to get an array of lines
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# $2 - The indent string
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# $3 - The string to reindent
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#
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# Returns nothing.
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moIndentLines() {
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local content fragment len posN posR result trimmed
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result=""
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#: Remove the period from the end of the string.
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len=$((${#3} - 1))
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content=${3:0:$len}
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if [[ -z "${2-}" ]]; then
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local "$1" && moIndirect "$1" "$content"
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return 0
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fi
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moFindString posN "$content" $'\n'
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moFindString posR "$content" $'\r'
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while [[ "$posN" -gt -1 ]] || [[ "$posR" -gt -1 ]]; do
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if [[ "$posN" -gt -1 ]]; then
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fragment="${content:0:$posN + 1}"
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content=${content:$posN + 1}
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else
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fragment="${content:0:$posR + 1}"
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content=${content:$posR + 1}
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fi
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moTrimChars trimmed "$fragment" false true " " $'\t' $'\n' $'\r'
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if [[ -n "$trimmed" ]]; then
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|
fragment="$2$fragment"
|
||
|
|
fi
|
||
|
|
|
||
|
|
result="$result$fragment"
|
||
|
|
|
||
|
|
moFindString posN "$content" $'\n'
|
||
|
|
moFindString posR "$content" $'\r'
|
||
|
|
|
||
|
|
# If the content ends in a newline, do not indent.
|
||
|
|
if [[ "$posN" -eq ${#content} ]]; then
|
||
|
|
# Special clause for \r\n
|
||
|
|
if [[ "$posR" -eq "$((posN - 1))" ]]; then
|
||
|
|
posR=-1
|
||
|
|
fi
|
||
|
|
|
||
|
|
posN=-1
|
||
|
|
fi
|
||
|
|
|
||
|
|
if [[ "$posR" -eq ${#content} ]]; then
|
||
|
|
posR=-1
|
||
|
|
fi
|
||
|
|
done
|
||
|
|
|
||
|
|
moTrimChars trimmed "$content" false true " " $'\t'
|
||
|
|
|
||
|
|
if [[ -n "$trimmed" ]]; then
|
||
|
|
content="$2$content"
|
||
|
|
fi
|
||
|
|
|
||
|
|
result="$result$content"
|
||
|
|
|
||
|
|
local "$1" && moIndirect "$1" "$result"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Send a variable up to the parent of the caller of this function.
|
||
|
|
#
|
||
|
|
# $1 - Variable name
|
||
|
|
# $2 - Value
|
||
|
|
#
|
||
|
|
# Examples
|
||
|
|
#
|
||
|
|
# callFunc () {
|
||
|
|
# local "$1" && moIndirect "$1" "the value"
|
||
|
|
# }
|
||
|
|
# callFunc dest
|
||
|
|
# echo "$dest" # writes "the value"
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moIndirect() {
|
||
|
|
unset -v "$1"
|
||
|
|
printf -v "$1" '%s' "$2"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Send an array as a variable up to caller of a function
|
||
|
|
#
|
||
|
|
# $1 - Variable name
|
||
|
|
# $2-@ - Array elements
|
||
|
|
#
|
||
|
|
# Examples
|
||
|
|
#
|
||
|
|
# callFunc () {
|
||
|
|
# local myArray=(one two three)
|
||
|
|
# local "$1" && moIndirectArray "$1" "${myArray[@]}"
|
||
|
|
# }
|
||
|
|
# callFunc dest
|
||
|
|
# echo "${dest[@]}" # writes "one two three"
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moIndirectArray() {
|
||
|
|
unset -v "$1"
|
||
|
|
|
||
|
|
# IFS must be set to a string containing space or unset in order for
|
||
|
|
# the array slicing to work regardless of the current IFS setting on
|
||
|
|
# bash 3. This is detailed further at
|
||
|
|
# https://github.com/fidian/gg-core/pull/7
|
||
|
|
eval "$(printf "IFS= %s=(\"\${@:2}\") IFS=%q" "$1" "$IFS")"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Determine if a given environment variable exists and if it is
|
||
|
|
# an array.
|
||
|
|
#
|
||
|
|
# $1 - Name of environment variable
|
||
|
|
#
|
||
|
|
# Be extremely careful. Even if strict mode is enabled, it is not honored
|
||
|
|
# in newer versions of Bash. Any errors that crop up here will not be
|
||
|
|
# caught automatically.
|
||
|
|
#
|
||
|
|
# Examples
|
||
|
|
#
|
||
|
|
# var=(abc)
|
||
|
|
# if moIsArray var; then
|
||
|
|
# echo "This is an array"
|
||
|
|
# echo "Make sure you don't accidentally use \$var"
|
||
|
|
# fi
|
||
|
|
#
|
||
|
|
# Returns 0 if the name is not empty, 1 otherwise.
|
||
|
|
moIsArray() {
|
||
|
|
# Namespace this variable so we don't conflict with what we're testing.
|
||
|
|
local moTestResult
|
||
|
|
|
||
|
|
moTestResult=$(declare -p "$1" 2>/dev/null) || return 1
|
||
|
|
[[ "${moTestResult:0:10}" == "declare -a" ]] && return 0
|
||
|
|
[[ "${moTestResult:0:10}" == "declare -A" ]] && return 0
|
||
|
|
|
||
|
|
return 1
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Determine if the given name is a defined function.
|
||
|
|
#
|
||
|
|
# $1 - Function name to check
|
||
|
|
#
|
||
|
|
# Be extremely careful. Even if strict mode is enabled, it is not honored
|
||
|
|
# in newer versions of Bash. Any errors that crop up here will not be
|
||
|
|
# caught automatically.
|
||
|
|
#
|
||
|
|
# Examples
|
||
|
|
#
|
||
|
|
# moo () {
|
||
|
|
# echo "This is a function"
|
||
|
|
# }
|
||
|
|
# if moIsFunction moo; then
|
||
|
|
# echo "moo is a defined function"
|
||
|
|
# fi
|
||
|
|
#
|
||
|
|
# Returns 0 if the name is a function, 1 otherwise.
|
||
|
|
moIsFunction() {
|
||
|
|
local functionList functionName
|
||
|
|
|
||
|
|
functionList=$(declare -F)
|
||
|
|
# shellcheck disable=SC2206
|
||
|
|
functionList=( ${functionList//declare -f /} )
|
||
|
|
|
||
|
|
for functionName in "${functionList[@]}"; do
|
||
|
|
if [[ "$functionName" == "$1" ]]; then
|
||
|
|
return 0
|
||
|
|
fi
|
||
|
|
done
|
||
|
|
|
||
|
|
return 1
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Determine if the tag is a standalone tag based on whitespace
|
||
|
|
# before and after the tag.
|
||
|
|
#
|
||
|
|
# Passes back a string containing two numbers in the format "BEFORE AFTER"
|
||
|
|
# like "27 10". It indicates the number of bytes remaining in the "before"
|
||
|
|
# string (27) and the number of bytes to trim in the "after" string (10).
|
||
|
|
# Useful for string manipulation:
|
||
|
|
#
|
||
|
|
# $1 - Variable to set for passing data back
|
||
|
|
# $2 - Content before the tag
|
||
|
|
# $3 - Content after the tag
|
||
|
|
# $4 - true/false: is this the beginning of the content?
|
||
|
|
#
|
||
|
|
# Examples
|
||
|
|
#
|
||
|
|
# moIsStandalone RESULT "$before" "$after" false || return 0
|
||
|
|
# RESULT_ARRAY=( $RESULT )
|
||
|
|
# echo "${before:0:${RESULT_ARRAY[0]}}...${after:${RESULT_ARRAY[1]}}"
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moIsStandalone() {
|
||
|
|
local afterTrimmed beforeTrimmed char
|
||
|
|
|
||
|
|
moTrimChars beforeTrimmed "$2" false true " " $'\t'
|
||
|
|
moTrimChars afterTrimmed "$3" true false " " $'\t'
|
||
|
|
char=$((${#beforeTrimmed} - 1))
|
||
|
|
char=${beforeTrimmed:$char}
|
||
|
|
|
||
|
|
# If the content before didn't end in a newline
|
||
|
|
if [[ "$char" != $'\n' ]] && [[ "$char" != $'\r' ]]; then
|
||
|
|
# and there was content or this didn't start the file
|
||
|
|
if [[ -n "$char" ]] || ! $4; then
|
||
|
|
# then this is not a standalone tag.
|
||
|
|
return 1
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
char=${afterTrimmed:0:1}
|
||
|
|
|
||
|
|
# If the content after doesn't start with a newline and it is something
|
||
|
|
if [[ "$char" != $'\n' ]] && [[ "$char" != $'\r' ]] && [[ -n "$char" ]]; then
|
||
|
|
# then this is not a standalone tag.
|
||
|
|
return 2
|
||
|
|
fi
|
||
|
|
|
||
|
|
if [[ "$char" == $'\r' ]] && [[ "${afterTrimmed:1:1}" == $'\n' ]]; then
|
||
|
|
char="$char"$'\n'
|
||
|
|
fi
|
||
|
|
|
||
|
|
local "$1" && moIndirect "$1" "$((${#beforeTrimmed})) $((${#3} + ${#char} - ${#afterTrimmed}))"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Join / implode an array
|
||
|
|
#
|
||
|
|
# $1 - Variable name to receive the joined content
|
||
|
|
# $2 - Joiner
|
||
|
|
# $3-$* - Elements to join
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moJoin() {
|
||
|
|
local joiner part result target
|
||
|
|
|
||
|
|
target=$1
|
||
|
|
joiner=$2
|
||
|
|
result=$3
|
||
|
|
shift 3
|
||
|
|
|
||
|
|
for part in "$@"; do
|
||
|
|
result="$result$joiner$part"
|
||
|
|
done
|
||
|
|
|
||
|
|
local "$target" && moIndirect "$target" "$result"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Read a file into a variable.
|
||
|
|
#
|
||
|
|
# $1 - Variable name to receive the file's content
|
||
|
|
# $2 - Filename to load - if empty, defaults to /dev/stdin
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moLoadFile() {
|
||
|
|
local content len
|
||
|
|
|
||
|
|
# The subshell removes any trailing newlines. We forcibly add
|
||
|
|
# a dot to the content to preserve all newlines.
|
||
|
|
# As a future optimization, it would be worth considering removing
|
||
|
|
# cat and replacing this with a read loop.
|
||
|
|
|
||
|
|
content=$(cat -- "${2:-/dev/stdin}" && echo '.') || return 1
|
||
|
|
len=$((${#content} - 1))
|
||
|
|
content=${content:0:$len} # Remove last dot
|
||
|
|
|
||
|
|
local "$1" && moIndirect "$1" "$content"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Process a chunk of content some number of times. Writes output
|
||
|
|
# to stdout.
|
||
|
|
#
|
||
|
|
# $1 - Content to parse repeatedly
|
||
|
|
# $2 - Tag prefix (context name)
|
||
|
|
# $3-@ - Names to insert into the parsed content
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moLoop() {
|
||
|
|
local content context contextBase
|
||
|
|
|
||
|
|
content=$1
|
||
|
|
contextBase=$2
|
||
|
|
shift 2
|
||
|
|
|
||
|
|
while [[ "${#@}" -gt 0 ]]; do
|
||
|
|
moFullTagName context "$contextBase" "$1"
|
||
|
|
moParse "$content" "$context" false
|
||
|
|
shift
|
||
|
|
done
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Parse a block of text, writing the result to stdout.
|
||
|
|
#
|
||
|
|
# $1 - Block of text to change
|
||
|
|
# $2 - Current name (the variable NAME for what {{.}} means)
|
||
|
|
# $3 - true when no content before this, false otherwise
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moParse() {
|
||
|
|
# Keep naming variables mo* here to not overwrite needed variables
|
||
|
|
# used in the string replacements
|
||
|
|
local moArgs moBlock moContent moCurrent moIsBeginning moNextIsBeginning moTag
|
||
|
|
|
||
|
|
moCurrent=$2
|
||
|
|
moIsBeginning=$3
|
||
|
|
|
||
|
|
# Find open tags
|
||
|
|
moSplit moContent "$1" '{{' '}}'
|
||
|
|
|
||
|
|
while [[ "${#moContent[@]}" -gt 1 ]]; do
|
||
|
|
moTrimWhitespace moTag "${moContent[1]}"
|
||
|
|
moNextIsBeginning=false
|
||
|
|
|
||
|
|
case $moTag in
|
||
|
|
'#'*)
|
||
|
|
# Loop, if/then, or pass content through function
|
||
|
|
# Sets context
|
||
|
|
moStandaloneAllowed moContent "${moContent[@]}" "$moIsBeginning"
|
||
|
|
moTrimWhitespace moTag "${moTag:1}"
|
||
|
|
|
||
|
|
# Split arguments from the tag name. Arguments are passed to
|
||
|
|
# functions.
|
||
|
|
moArgs=$moTag
|
||
|
|
moTag=${moTag%% *}
|
||
|
|
moTag=${moTag%%$'\t'*}
|
||
|
|
moArgs=${moArgs:${#moTag}}
|
||
|
|
moFindEndTag moBlock "$moContent" "$moTag"
|
||
|
|
moFullTagName moTag "$moCurrent" "$moTag"
|
||
|
|
|
||
|
|
if moTest "$moTag"; then
|
||
|
|
# Show / loop / pass through function
|
||
|
|
if moIsFunction "$moTag"; then
|
||
|
|
moCallFunction moContent "$moTag" "${moBlock[0]}" "$moArgs"
|
||
|
|
moParse "$moContent" "$moCurrent" false
|
||
|
|
moContent="${moBlock[2]}"
|
||
|
|
elif moIsArray "$moTag"; then
|
||
|
|
eval "moLoop \"\${moBlock[0]}\" \"$moTag\" \"\${!${moTag}[@]}\""
|
||
|
|
else
|
||
|
|
moParse "${moBlock[0]}" "$moCurrent" true
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
moContent="${moBlock[2]}"
|
||
|
|
;;
|
||
|
|
|
||
|
|
'>'*)
|
||
|
|
# Load partial - get name of file relative to cwd
|
||
|
|
moPartial moContent "${moContent[@]}" "$moIsBeginning" "$moCurrent"
|
||
|
|
moNextIsBeginning=${moContent[1]}
|
||
|
|
moContent=${moContent[0]}
|
||
|
|
;;
|
||
|
|
|
||
|
|
'/'*)
|
||
|
|
# Closing tag - If hit in this loop, we simply ignore
|
||
|
|
# Matching tags are found in moFindEndTag
|
||
|
|
moStandaloneAllowed moContent "${moContent[@]}" "$moIsBeginning"
|
||
|
|
;;
|
||
|
|
|
||
|
|
'^'*)
|
||
|
|
# Display section if named thing does not exist
|
||
|
|
moStandaloneAllowed moContent "${moContent[@]}" "$moIsBeginning"
|
||
|
|
moTrimWhitespace moTag "${moTag:1}"
|
||
|
|
moFindEndTag moBlock "$moContent" "$moTag"
|
||
|
|
moFullTagName moTag "$moCurrent" "$moTag"
|
||
|
|
|
||
|
|
if ! moTest "$moTag"; then
|
||
|
|
moParse "${moBlock[0]}" "$moCurrent" false "$moCurrent"
|
||
|
|
fi
|
||
|
|
|
||
|
|
moContent="${moBlock[2]}"
|
||
|
|
;;
|
||
|
|
|
||
|
|
'!'*)
|
||
|
|
# Comment - ignore the tag content entirely
|
||
|
|
# Trim spaces/tabs before the comment
|
||
|
|
moStandaloneAllowed moContent "${moContent[@]}" "$moIsBeginning"
|
||
|
|
;;
|
||
|
|
|
||
|
|
.)
|
||
|
|
# Current content (environment variable or function)
|
||
|
|
moStandaloneDenied moContent "${moContent[@]}"
|
||
|
|
moShow "$moCurrent" "$moCurrent"
|
||
|
|
;;
|
||
|
|
|
||
|
|
'=')
|
||
|
|
# Change delimiters
|
||
|
|
# Any two non-whitespace sequences separated by whitespace.
|
||
|
|
# This tag is ignored.
|
||
|
|
moStandaloneAllowed moContent "${moContent[@]}" "$moIsBeginning"
|
||
|
|
;;
|
||
|
|
|
||
|
|
'{'*)
|
||
|
|
# Unescaped - split on }}} not }}
|
||
|
|
moStandaloneDenied moContent "${moContent[@]}"
|
||
|
|
moContent="${moTag:1}"'}}'"$moContent"
|
||
|
|
moSplit moContent "$moContent" '}}}'
|
||
|
|
moTrimWhitespace moTag "${moContent[0]}"
|
||
|
|
moArgs=$moTag
|
||
|
|
moTag=${moTag%% *}
|
||
|
|
moTag=${moTag%%$'\t'*}
|
||
|
|
moArgs=${moArgs:${#moTag}}
|
||
|
|
moFullTagName moTag "$moCurrent" "$moTag"
|
||
|
|
moContent=${moContent[1]}
|
||
|
|
|
||
|
|
# Now show the value
|
||
|
|
# Quote moArgs here, do not quote it later.
|
||
|
|
moShow "$moTag" "$moCurrent" "$moArgs"
|
||
|
|
;;
|
||
|
|
|
||
|
|
'&'*)
|
||
|
|
# Unescaped
|
||
|
|
moStandaloneDenied moContent "${moContent[@]}"
|
||
|
|
moTrimWhitespace moTag "${moTag:1}"
|
||
|
|
moFullTagName moTag "$moCurrent" "$moTag"
|
||
|
|
moShow "$moTag" "$moCurrent"
|
||
|
|
;;
|
||
|
|
|
||
|
|
*)
|
||
|
|
# Normal environment variable or function call
|
||
|
|
moStandaloneDenied moContent "${moContent[@]}"
|
||
|
|
moArgs=$moTag
|
||
|
|
moTag=${moTag%% *}
|
||
|
|
moTag=${moTag%%$'\t'*}
|
||
|
|
moArgs=${moArgs:${#moTag}}
|
||
|
|
moFullTagName moTag "$moCurrent" "$moTag"
|
||
|
|
|
||
|
|
# Quote moArgs here, do not quote it later.
|
||
|
|
moShow "$moTag" "$moCurrent" "$moArgs"
|
||
|
|
;;
|
||
|
|
esac
|
||
|
|
|
||
|
|
moIsBeginning=$moNextIsBeginning
|
||
|
|
moSplit moContent "$moContent" '{{' '}}'
|
||
|
|
done
|
||
|
|
|
||
|
|
echo -n "${moContent[0]}"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Process a partial.
|
||
|
|
#
|
||
|
|
# Indentation should be applied to the entire partial.
|
||
|
|
#
|
||
|
|
# This sends back the "is beginning" flag because the newline after a
|
||
|
|
# standalone partial is consumed. That newline is very important in the middle
|
||
|
|
# of content. We send back this flag to reset the processing loop's
|
||
|
|
# `moIsBeginning` variable, so the software thinks we are back at the
|
||
|
|
# beginning of a file and standalone processing continues to work.
|
||
|
|
#
|
||
|
|
# Prefix all variables.
|
||
|
|
#
|
||
|
|
# $1 - Name of destination variable. Element [0] is the content, [1] is the
|
||
|
|
# true/false flag indicating if we are at the beginning of content.
|
||
|
|
# $2 - Content before the tag that was not yet written
|
||
|
|
# $3 - Tag content
|
||
|
|
# $4 - Content after the tag
|
||
|
|
# $5 - true/false: is this the beginning of the content?
|
||
|
|
# $6 - Current context name
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moPartial() {
|
||
|
|
# Namespace variables here to prevent conflicts.
|
||
|
|
local moContent moFilename moIndent moIsBeginning moPartial moStandalone moUnindented
|
||
|
|
|
||
|
|
if moIsStandalone moStandalone "$2" "$4" "$5"; then
|
||
|
|
# shellcheck disable=SC2206
|
||
|
|
moStandalone=( $moStandalone )
|
||
|
|
echo -n "${2:0:${moStandalone[0]}}"
|
||
|
|
moIndent=${2:${moStandalone[0]}}
|
||
|
|
moContent=${4:${moStandalone[1]}}
|
||
|
|
moIsBeginning=true
|
||
|
|
else
|
||
|
|
moIndent=""
|
||
|
|
echo -n "$2"
|
||
|
|
moContent=$4
|
||
|
|
moIsBeginning=$5
|
||
|
|
fi
|
||
|
|
|
||
|
|
moTrimWhitespace moFilename "${3:1}"
|
||
|
|
|
||
|
|
# Execute in subshell to preserve current cwd and environment
|
||
|
|
(
|
||
|
|
# It would be nice to remove `dirname` and use a function instead,
|
||
|
|
# but that's difficult when you're only given filenames.
|
||
|
|
cd "$(dirname -- "$moFilename")" || exit 1
|
||
|
|
moUnindented="$(
|
||
|
|
moLoadFile moPartial "${moFilename##*/}" || exit 1
|
||
|
|
moParse "${moPartial}" "$6" true
|
||
|
|
|
||
|
|
# Fix bash handling of subshells and keep trailing whitespace.
|
||
|
|
# This is removed in moIndentLines.
|
||
|
|
echo -n "."
|
||
|
|
)" || exit 1
|
||
|
|
moIndentLines moPartial "$moIndent" "$moUnindented"
|
||
|
|
echo -n "$moPartial"
|
||
|
|
) || exit 1
|
||
|
|
|
||
|
|
# If this is a standalone tag, the trailing newline after the tag is
|
||
|
|
# removed and the contents of the partial are added, which typically
|
||
|
|
# contain a newline. We need to send a signal back to the processing
|
||
|
|
# loop that the moIsBeginning flag needs to be turned on again.
|
||
|
|
#
|
||
|
|
# [0] is the content, [1] is that flag.
|
||
|
|
local "$1" && moIndirectArray "$1" "$moContent" "$moIsBeginning"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Show an environment variable or the output of a function to
|
||
|
|
# stdout.
|
||
|
|
#
|
||
|
|
# Limit/prefix any variables used.
|
||
|
|
#
|
||
|
|
# $1 - Name of environment variable or function
|
||
|
|
# $2 - Current context
|
||
|
|
# $3 - Arguments string if $1 is a function
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moShow() {
|
||
|
|
# Namespace these variables
|
||
|
|
local moJoined moNameParts moContent
|
||
|
|
|
||
|
|
if moIsFunction "$1"; then
|
||
|
|
moCallFunction moContent "$1" "" "$3"
|
||
|
|
moParse "$moContent" "$2" false
|
||
|
|
return 0
|
||
|
|
fi
|
||
|
|
|
||
|
|
moSplit moNameParts "$1" "."
|
||
|
|
|
||
|
|
if [[ -z "${moNameParts[1]-}" ]]; then
|
||
|
|
if moIsArray "$1"; then
|
||
|
|
eval moJoin moJoined "," "\${$1[@]}"
|
||
|
|
echo -n "$moJoined"
|
||
|
|
else
|
||
|
|
# shellcheck disable=SC2031
|
||
|
|
if moTestVarSet "$1"; then
|
||
|
|
echo -n "${!1}"
|
||
|
|
elif [[ -n "${MO_FAIL_ON_UNSET-}" ]]; then
|
||
|
|
echo "Env variable not set: $1" >&2
|
||
|
|
exit 1
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
else
|
||
|
|
# Further subindexes are disallowed
|
||
|
|
eval "echo -n \"\${${moNameParts[0]}[${moNameParts[1]%%.*}]}\""
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Split a larger string into an array.
|
||
|
|
#
|
||
|
|
# $1 - Destination variable
|
||
|
|
# $2 - String to split
|
||
|
|
# $3 - Starting delimiter
|
||
|
|
# $4 - Ending delimiter (optional)
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moSplit() {
|
||
|
|
local pos result
|
||
|
|
|
||
|
|
result=( "$2" )
|
||
|
|
moFindString pos "${result[0]}" "$3"
|
||
|
|
|
||
|
|
if [[ "$pos" -ne -1 ]]; then
|
||
|
|
# The first delimiter was found
|
||
|
|
result[1]=${result[0]:$pos + ${#3}}
|
||
|
|
result[0]=${result[0]:0:$pos}
|
||
|
|
|
||
|
|
if [[ -n "${4-}" ]]; then
|
||
|
|
moFindString pos "${result[1]}" "$4"
|
||
|
|
|
||
|
|
if [[ "$pos" -ne -1 ]]; then
|
||
|
|
# The second delimiter was found
|
||
|
|
result[2]="${result[1]:$pos + ${#4}}"
|
||
|
|
result[1]="${result[1]:0:$pos}"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
local "$1" && moIndirectArray "$1" "${result[@]}"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Handle the content for a standalone tag. This means removing
|
||
|
|
# whitespace (not newlines) before a tag and whitespace and a newline after
|
||
|
|
# a tag. That is, assuming, that the line is otherwise empty.
|
||
|
|
#
|
||
|
|
# $1 - Name of destination "content" variable.
|
||
|
|
# $2 - Content before the tag that was not yet written
|
||
|
|
# $3 - Tag content (not used)
|
||
|
|
# $4 - Content after the tag
|
||
|
|
# $5 - true/false: is this the beginning of the content?
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moStandaloneAllowed() {
|
||
|
|
local bytes
|
||
|
|
|
||
|
|
if moIsStandalone bytes "$2" "$4" "$5"; then
|
||
|
|
# shellcheck disable=SC2206
|
||
|
|
bytes=( $bytes )
|
||
|
|
echo -n "${2:0:${bytes[0]}}"
|
||
|
|
local "$1" && moIndirect "$1" "${4:${bytes[1]}}"
|
||
|
|
else
|
||
|
|
echo -n "$2"
|
||
|
|
local "$1" && moIndirect "$1" "$4"
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Handle the content for a tag that is never "standalone". No
|
||
|
|
# adjustments are made for newlines and whitespace.
|
||
|
|
#
|
||
|
|
# $1 - Name of destination "content" variable.
|
||
|
|
# $2 - Content before the tag that was not yet written
|
||
|
|
# $3 - Tag content (not used)
|
||
|
|
# $4 - Content after the tag
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moStandaloneDenied() {
|
||
|
|
echo -n "$2"
|
||
|
|
local "$1" && moIndirect "$1" "$4"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Determines if the named thing is a function or if it is a
|
||
|
|
# non-empty environment variable. When MO_FALSE_IS_EMPTY is set to a
|
||
|
|
# non-empty value, then "false" is also treated is an empty value.
|
||
|
|
#
|
||
|
|
# Do not use variables without prefixes here if possible as this needs to
|
||
|
|
# check if any name exists in the environment
|
||
|
|
#
|
||
|
|
# $1 - Name of environment variable or function
|
||
|
|
# $2 - Current value (our context)
|
||
|
|
# MO_FALSE_IS_EMPTY - When set to a non-empty value, this will say the
|
||
|
|
# string value "false" is empty.
|
||
|
|
#
|
||
|
|
# Returns 0 if the name is not empty, 1 otherwise. When MO_FALSE_IS_EMPTY
|
||
|
|
# is set, this returns 1 if the name is "false".
|
||
|
|
moTest() {
|
||
|
|
# Test for functions
|
||
|
|
moIsFunction "$1" && return 0
|
||
|
|
|
||
|
|
if moIsArray "$1"; then
|
||
|
|
# Arrays must have at least 1 element
|
||
|
|
eval "[[ \"\${#${1}[@]}\" -gt 0 ]]" && return 0
|
||
|
|
else
|
||
|
|
# If MO_FALSE_IS_EMPTY is set, then return 1 if the value of
|
||
|
|
# the variable is "false".
|
||
|
|
# shellcheck disable=SC2031
|
||
|
|
[[ -n "${MO_FALSE_IS_EMPTY-}" ]] && [[ "${!1-}" == "false" ]] && return 1
|
||
|
|
|
||
|
|
# Environment variables must not be empty
|
||
|
|
[[ -n "${!1-}" ]] && return 0
|
||
|
|
fi
|
||
|
|
|
||
|
|
return 1
|
||
|
|
}
|
||
|
|
|
||
|
|
# Internal: Determine if a variable is assigned, even if it is assigned an empty
|
||
|
|
# value.
|
||
|
|
#
|
||
|
|
# $1 - Variable name to check.
|
||
|
|
#
|
||
|
|
# Returns true (0) if the variable is set, 1 if the variable is unset.
|
||
|
|
moTestVarSet() {
|
||
|
|
[[ "${!1-a}" == "${!1-b}" ]]
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Trim the leading whitespace only.
|
||
|
|
#
|
||
|
|
# $1 - Name of destination variable
|
||
|
|
# $2 - The string
|
||
|
|
# $3 - true/false - trim front?
|
||
|
|
# $4 - true/false - trim end?
|
||
|
|
# $5-@ - Characters to trim
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moTrimChars() {
|
||
|
|
local back current front last target varName
|
||
|
|
|
||
|
|
target=$1
|
||
|
|
current=$2
|
||
|
|
front=$3
|
||
|
|
back=$4
|
||
|
|
last=""
|
||
|
|
shift 4 # Remove target, string, trim front flag, trim end flag
|
||
|
|
|
||
|
|
while [[ "$current" != "$last" ]]; do
|
||
|
|
last=$current
|
||
|
|
|
||
|
|
for varName in "$@"; do
|
||
|
|
$front && current="${current/#$varName}"
|
||
|
|
$back && current="${current/%$varName}"
|
||
|
|
done
|
||
|
|
done
|
||
|
|
|
||
|
|
local "$target" && moIndirect "$target" "$current"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Trim leading and trailing whitespace from a string.
|
||
|
|
#
|
||
|
|
# $1 - Name of variable to store trimmed string
|
||
|
|
# $2 - The string
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moTrimWhitespace() {
|
||
|
|
local result
|
||
|
|
|
||
|
|
moTrimChars result "$2" true true $'\r' $'\n' $'\t' " "
|
||
|
|
local "$1" && moIndirect "$1" "$result"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Internal: Displays the usage for mo. Pulls this from the file that
|
||
|
|
# contained the `mo` function. Can only work when the right filename
|
||
|
|
# comes is the one argument, and that only happens when `mo` is called
|
||
|
|
# with `$0` set to this file.
|
||
|
|
#
|
||
|
|
# $1 - Filename that has the help message
|
||
|
|
#
|
||
|
|
# Returns nothing.
|
||
|
|
moUsage() {
|
||
|
|
grep '^#/' "${MO_ORIGINAL_COMMAND}" | cut -c 4-
|
||
|
|
echo ""
|
||
|
|
echo "MO_VERSION=$MO_VERSION"
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# Save the original command's path for usage later
|
||
|
|
MO_ORIGINAL_COMMAND="$(cd "${BASH_SOURCE[0]%/*}" || exit 1; pwd)/${BASH_SOURCE[0]##*/}"
|
||
|
|
MO_VERSION="2.2.0"
|
||
|
|
|
||
|
|
# If sourced, load all functions.
|
||
|
|
# If executed, perform the actions as expected.
|
||
|
|
if [[ "$0" == "${BASH_SOURCE[0]}" ]] || [[ -z "${BASH_SOURCE[0]}" ]]; then
|
||
|
|
mo "$@"
|
||
|
|
fi
|