refactor(map): compound matchers like parsing with libmatchers

This commit is contained in:
Daniel Dehennin 2021-01-11 17:41:20 +01:00
parent 7ecb24bdc1
commit 925c86ea69
2 changed files with 240 additions and 105 deletions

208
openssh/libmatchers.jinja Normal file
View File

@ -0,0 +1,208 @@
{#- -*- coding: utf-8 -*- #}
{#- vim: ft=jinja #}
{#- Get the `tplroot` from `tpldir` #}
{%- set tplroot = tpldir.split("/")[0] %}
{%- from tplroot ~ "/libsaltcli.jinja" import cli %}
{%- set query_map = {
"C": "config.get",
"G": "grains.get",
"I": "pillar.get",
} %}
{#- When no part before `@` is provided: #}
{#- - define a filename path, noted `F` #}
{#- - use `salt["config.get"]`, noted `C` #}
{%- set _defaults = {
"type": "F",
"query_type": "C",
} %}
{%- macro parse_matchers(
matchers,
config_get_strategy=None,
log_prefix="libmatchers: "
) %}
{#- matcher format is `[<TYPE>[:<OPTION>]@]<KEY>` #}
{#- each matcher has a type: #}
{#- - `F` to build a file name (the default when no type is set) #}
{#- - `C` to lookup values with `config.get` #}
{#- - `G` to lookup values with `grains.get` #}
{#- - `I` to lookup values with `pillar.get` #}
{#- The `FILE` type option can define query type to build the file name: #}
{#- - `C` for query with `config.get` (the default when to query type is set) #}
{#- - `G` for query with `grains.get` #}
{#- - `I` for query with `pillar.get` #}
{%- set parsed_matchers = [] %}
{%- for matcher in matchers %}
{%- do salt["log.debug"](
log_prefix
~ "process matcher: '"
~ matcher
~ "'"
) %}
{%- set parsed = {} %}
{%- set matcher_parts = matcher.split('@') %}
{%- if matcher_parts | length == 1 %}
{#- By default we load YAML files for config looked up by `config.get` #}
{%- do parsed.update(
{
"type": _defaults["type"],
"option": None,
"query_method": query_map[_defaults["query_type"]],
"query": matcher
}
) %}
{%- do salt["log.debug"](
log_prefix
~ "use built-in defaults for matcher:\n"
~ parsed
| yaml(False)
| indent(4, True)
) %}
{%- else %}
{%- do salt["log.debug"](
log_prefix
~ "parse matcher: '"
~ matcher
~ "'"
) %}
{%- set metadatas = matcher_parts[0].split(":") %}
{%- do parsed.update(
{
"query": matcher_parts[1]
}
) %}
{%- if metadatas | length == 1 %}
{%- do parsed.update(
{
"type": metadatas[0],
"option": "C",
}
) %}
{%- do salt["log.debug"](
log_prefix
~ "parse as 1 metadata matcher:\n"
~ parsed
| yaml(False)
| indent(4, True)
) %}
{%- elif metadatas | length == 2 %}
{%- do parsed.update(
{
"type": metadatas[0],
"option": metadatas[1],
}
) %}
{%- do salt["log.debug"](
log_prefix
~ "parse as 2 metadata matcher:\n"
~ parsed
| yaml(False)
| indent(4, True)
) %}
{%- elif metadatas | length == 3 %}
{%- do parsed.update(
{
"type": metadatas[0],
"option": metadatas[1],
}
) %}
{%- do salt["log.debug"](
log_prefix
~ "parse as 3 metadata matcher:\n"
~ parsed
| yaml(False)
| indent(4, True)
) %}
{%- elif metadatas | length == 4 %}
{%- do parsed.update(
{
"type": metadatas[0],
"option": metadatas[1],
}
) %}
{%- do salt["log.debug"](
log_prefix
~ "parse as 4 metadata matcher:\n"
~ parsed
| yaml(False)
| indent(4, True)
) %}
{%- endif %}
{%- endif %}
{#- The `<OPTION>` has different meaning based on type #}
{%- if query_map.get(parsed.type, False) %}
{%- do parsed.update(
{
"query_method": query_map[parsed.type]
}
) %}
{%- else %}
{%- do parsed.update(
{
"query_method": query_map[
parsed.option
| default("C", boolean=True)
]
}
) %}
{%- endif %}
{#- Add `merge:` option to `salt["config.get"]` if configured #}
{%- if cli in ["minion", "local"] and parsed.query_method == "config.get" and config_get_strategy %}
{%- set merge_opt = {"merge": config_get_strategy} %}
{%- set merge_msg = (
", merge: strategy='"
~ config_get_strategy
~ "'"
) %}
{%- else %}
{%- if cli not in ["minion", "local"] %}
{%- do salt["log.error"](
log_prefix
~ "the 'merge' option of 'config.get' is skipped when the salt command type is '"
~ cli
~ "'"
) %}
{%- endif %}
{%- set merge_opt = {} %}
{%- set merge_msg = "" %}
{%- endif %}
{%- do salt["log.debug"](
log_prefix
~ "lookup '"
~ parsed.query
~ "' with '"
~ parsed.query_method
~ "'"
~ merge_msg
) %}
{%- set values = salt[parsed.query_method](
parsed.query,
default=[],
**merge_opt
) %}
{%- do parsed.update(
{
"value": values
}
) %}
{%- do parsed_matchers.append(parsed) %}
{%- endfor %}
{%- do salt["log.debug"](
log_prefix
~ "parsed matchers:\n"
~ parsed_matchers
| yaml(False)
| indent(4, True)
) %}
{{ parsed_matchers | yaml }}
{%- endmacro %}

View File

@ -3,7 +3,7 @@
{#- Get the `tplroot` from `tpldir` #}
{%- set tplroot = tpldir.split("/")[0] %}
{%- from tplroot ~ "/libsaltcli.jinja" import cli with context %}
{%- from tplroot ~ "/libmatchers.jinja" import parse_matchers, query_map %}
{#- Where to lookup parameters source files #}
{%- set map_sources_dir = tplroot ~ "/parameters" %}
@ -114,93 +114,24 @@
"merge_lists": salt["config.get"](tplroot ~ ":merge_lists", False),
} %}
{#- the `config.get` merge option only works for `minion` or `local` salt command types #}
{%- if cli in ["minion", "local"] %}
{%- do _config.update(
{
"merge_opt": {"merge": _config["merge_strategy"]},
"merge_msg": ", merge: strategy='" ~ _config["merge_strategy"] ~ "'",
}
) %}
{#- the `config.get` merge option is not available for `ssh` or `unknown` salt command types #}
{%- else %}
{%- if _config["merge_strategy"] %}
{%- do salt["log.error"](
"map.jinja: the 'merge' option of 'config.get' is skipped when the salt command type is '"
~ cli
~ "'"
) %}
{%- endif %}
{%- do _config.update(
{
"merge_opt": {},
"merge_msg": "",
}
) %}
{%- endif %}
{#- `parse_matchers` returns a `list` of `dict` with #}
{#- - type: `F` to load file, `C`, `G`, `I` for lookup #}
{#- - option: specific to the type #}
{#- - query: which key is requested #}
{#- - query_method: the salt method doing the query `config.get`, `pillar.get` and `grains.get` #}
{#- - value: the result of the `salt[<query_method>](<query>)` #}
{%- set map_matchers = parse_matchers(
matchers=map_sources,
config_get_strategy=_config["merge_strategy"],
log_prefix="map.jinja: "
)
| load_yaml %}
{%- set query_map = {
"C": "config.get",
"G": "grains.get",
"I": "pillar.get",
} %}
{%- for matcher in map_matchers %}
{#- Process each `map.jinja` source #}
{#- each source has a type: #}
{#- - `Y` to load values from YAML files (the default when no type is set) #}
{#- - `C` to lookup values with `config.get` #}
{#- - `G` to lookup values with `grains.get` #}
{#- - `I` to lookup values with `pillar.get` #}
{#- The YAML type option can define query type to build the file name: #}
{#- - `C` for query with `config.get` (the default when to query type is set) #}
{#- - `G` for query with `grains.get` #}
{#- - `I` for query with `pillar.get` #}
{#- The `C`, `G` or `I` types can define the `SUB` option #}
{#- to merge values in the sub key `mapdata.<key>` instead of directly in `mapdata` #}
{%- for map_source in map_sources %}
{%- set source_parts = map_source.split('@') %}
{%- if source_parts|length == 1 %}
{#- By default we load YAML files for config looked up by `config.get` #}
{%- set source_type = "Y" %}
{%- set query_type = "C" %}
{%- set source_key = map_source %}
{%- elif source_parts[0][0] == "Y" %}
{%- set source_type = "Y" %}
{%- set query_type = source_parts[0].split(':')[1] | default("C") %}
{%- set source_key = source_parts[1] %}
{%- elif source_parts[0][0] in query_map.keys() %}
{%- set source_type = source_parts[0].split(':') | first %}
{%- set query_type = source_type %}
{%- set is_sub_key = source_parts[0].split(':')[1] | default(False) == "SUB" %}
{%- set source_key = source_parts[1] %}
{%- endif %}
{%- set query_method = query_map[query_type] %}
{%- if source_type in query_map.keys() %}
{#- Lookup source `<QUERY_METHOD>@key:to:query` #}
{%- if source_type == "C" %}
{%- set merge_opts = _config["merge_opt"] %}
{%- set merge_msg = _config["merge_msg"] %}
{%- else %}
{#- No merging strategy supported for `grains.get` and `pillar.get` #}
{%- set merge_opts = {} %}
{%- set merge_msg = "" %}
{%- endif %}
{%- do salt["log.debug"](
"map.jinja: retrieve '"
~ source_key
~ "' with '"
~ query_method
~ "'"
~ merge_msg
) %}
{%- set _config_get = salt[query_method](
source_key,
default={},
**merge_opts
) %}
{%- if matcher.type in query_map.keys() %}
{#- Merge in `mapdata.<query>` instead of directcly in `mapdata` #}
{%- set is_sub_key = matcher.option | default(False) == "SUB" %}
{#- `slsutil.merge` defaults to `smart` instead of `None` for `config.get` #}
{%- set _strategy = _config["merge_strategy"] | default("smart", boolean=True) %}
@ -208,9 +139,9 @@
"map.jinja: merge "
~ "sub key " * is_sub_key
~ "'"
~ source_key
~ matcher.query
~ "' retrieved with '"
~ query_method
~ matcher.query_method
~ "', merge: strategy='"
~ _strategy
~ "', lists='"
@ -218,15 +149,17 @@
~ "'"
) %}
{#- empty value is an empty list, it must be an empty dict for `.update` #}
{%- set value = matcher.value | default({}, boolean=True) %}
{%- if is_sub_key %}
{#- Merge values with `mapdata.<key>`, `<key>` and `<key>:lookup` are merged together #}
{%- set _config_get = { source_key.rstrip(':lookup'): _config_get } %}
{%- set value = { matcher.query | regex_replace("(:lookup)?$", ""): value } %}
{%- endif %}
{%- do _config.update(
{
"stack": salt["slsutil.merge"](
_config["stack"],
_config_get,
value,
strategy=_strategy,
merge_lists=_config["merge_lists"],
)
@ -235,20 +168,14 @@
{%- else %}
{#- Load YAML file matching the grain/pillar/... #}
{#- Fallback to use the source name as a direct filename #}
{%- do salt["log.debug"](
"map.jinja: lookup '"
~ source_key
~ "' with '"
~ query_method
~ "'"
) %}
{%- set map_values = salt[query_method](source_key, []) %}
{#- Mangle `source_key` to use it as literal path #}
{%- if map_values | length == 0 %}
{%- set map_source_parts = source_key.split("/") %}
{%- set source_key = map_source_parts[0:-1] | join("/") %}
{%- set map_values = map_source_parts[-1].rstrip(".yaml") %}
{%- if matcher.value | length == 0 %}
{%- set query_parts = matcher.query.split("/") %}
{%- set map_dirname = query_parts[0:-1] | join("/") %}
{%- set map_values = query_parts[-1] | regex_replace("(\.yaml)?$", ".yaml") %}
{%- else %}
{%- set map_dirname = matcher.query %}
{%- set map_values = matcher.value %}
{%- endif %}
{#- Some configuration return list #}
@ -256,10 +183,10 @@
{%- set map_values = [map_values] %}
{%- endif %}
{#- `source_key` can be an empty string with literal path like `myconf.yaml` #}
{#- `map_dirname` can be an empty string with literal path like `myconf.yaml` #}
{%- set yaml_dir = [
map_sources_dir,
source_key
map_dirname
]
| select
| join("/") %}