Implement support for bash & completion flow generation

extras/completion/completion.bash

@@ -0,0 +1,53 @@
+METHODS=("GET" "POST" "PUT" "DELETE" "HEAD" "OPTIONS" "PATCH" "TRACE" "CONNECT" )
+NORMARG=1 # TO-DO: dynamically calculate this?
+
+_http_complete() {
+    local cur_word=${COMP_WORDS[COMP_CWORD]}
+    local prev_word=${COMP_WORDS[COMP_CWORD - 1]}
+
+    if [[ "$cur_word" == -* ]]; then
+        _http_complete_options "$cur_word"
+    else
+        if (( COMP_CWORD == NORMARG + 0 )); then
+            _http_complete_methods "$cur_word"
+        fi
+        if (( COMP_CWORD == NORMARG + 0 )); then
+            _http_complete_url "$cur_word"
+        fi
+        if (( COMP_CWORD == NORMARG + 1 )) && [[ " ${METHODS[*]} " =~ " ${prev_word} " ]]; then
+            _http_complete_url "$cur_word"
+        fi
+        if (( COMP_CWORD >= NORMARG + 2 )); then
+            _httpie_complete_request_item "$cur_word"
+        fi
+        if (( COMP_CWORD >= NORMARG + 1 )) && ! [[ " ${METHODS[*]} " =~ " ${prev_word} " ]]; then
+            _httpie_complete_request_item "$cur_word"
+        fi
+        
+    fi
+}
+
+complete -o default -F _http_complete http httpie.http httpie.https https
+
+_http_complete_methods() {
+    local cur_word=$1
+    local options="GET POST PUT DELETE HEAD OPTIONS PATCH TRACE CONNECT"
+    COMPREPLY+=( $( compgen -W "$options" -- "$cur_word" ) )
+}
+
+_http_complete_url() {
+    local cur_word=$1
+    local options="http:// https://"
+    COMPREPLY+=( $( compgen -W "$options" -- "$cur_word" ) )
+}
+
+_httpie_complete_request_item() {
+    local cur_word=$1
+    COMPREPLY+=("==" "=" ":=" ":=@")
+}
+
+_http_complete_options() {
+    local cur_word=$1
+    local options="--json -j --form -f --multipart --boundary --raw --compress -x --pretty --style -s --unsorted --sorted --response-charset --response-mime --format-options --print -p --headers -h --meta -m --body -b --verbose -v --all --stream -S --output -o --download -d --continue -c --quiet -q --session --session-read-only --auth -a --auth-type -A --ignore-netrc --offline --proxy --follow -F --max-redirects --max-headers --timeout --check-status --path-as-is --chunked --verify --ssl --ciphers --cert --cert-key --cert-key-pass --ignore-stdin -I --help --manual --version --traceback --default-scheme --debug "
+    COMPREPLY=( $( compgen -W "$options" -- "$cur_word" ) )
+}

extras/completion/completion.zsh

@@ -27,6 +27,7 @@ fi
         if (( CURRENT >= NORMARG + 1 )) && ! [[ ${METHODS[(ie)$predecessor]} -le ${#METHODS} ]]; then
             _httpie_request_item && ret=0
         fi
+        
     fi
 
     return $ret

extras/completion/templates/completion.bash.j2

@@ -0,0 +1,40 @@
+METHODS=({% for method in methods -%} "{{ method }}" {% endfor -%})
+NORMARG=1 # TO-DO: dynamically calculate this?
+
+_http_complete() {
+    local cur_word=${COMP_WORDS[COMP_CWORD]}
+    local prev_word=${COMP_WORDS[COMP_CWORD - 1]}
+
+    if [[ "$cur_word" == -* ]]; then
+        _http_complete_options "$cur_word"
+    else
+        {% for flow_item in generate_flow() -%}
+            {{ compile_bash(flow_item) | indent(width=8) }}
+        {% endfor %}
+    fi
+}
+
+complete -o default -F _http_complete http httpie.http httpie.https https
+
+_http_complete_methods() {
+    local cur_word=$1
+    local options="{{' '.join(methods)}}"
+    COMPREPLY+=( $( compgen -W "$options" -- "$cur_word" ) )
+}
+
+_http_complete_url() {
+    local cur_word=$1
+    local options="http:// https://"
+    COMPREPLY+=( $( compgen -W "$options" -- "$cur_word" ) )
+}
+
+_httpie_complete_request_item() {
+    local cur_word=$1
+    COMPREPLY+=("==" "=" ":=" ":=@")
+}
+
+_http_complete_options() {
+    local cur_word=$1
+    local options="{% for argument in arguments -%} {{ ' '.join(argument.aliases) }} {% endfor -%}"
+    COMPREPLY=( $( compgen -W "$options" -- "$cur_word" ) )
+}

extras/completion/templates/completion.zsh.j2

@@ -13,8 +13,8 @@ _httpie_params () {
 
     if ! [[ $current == -* ]]; then
         {% for flow_item in generate_flow() -%}
-            {{ compile_zsh(flow_item) }}
-        {% endfor -%}
+            {{ compile_zsh(flow_item) | indent(width=8) }}
+        {% endfor %}
     fi
 
     return $ret

extras/httpie-completion.bash

@@ -1,20 +0,0 @@
-_http_complete() {
-    local cur_word=${COMP_WORDS[COMP_CWORD]}
-    local prev_word=${COMP_WORDS[COMP_CWORD - 1]}
-
-    if [[ "$cur_word" == -* ]]; then
-        _http_complete_options "$cur_word"
-    fi
-}
-
-complete -o default -F _http_complete http httpie.http httpie.https https
-
-_http_complete_options() {
-    local cur_word=$1
-    local options="-j --json -f --form --pretty -s --style -p --print
-    -v --verbose -h --headers -b --body -S --stream -o --output -d --download
-    -c --continue --session --session-read-only -a --auth --auth-type --proxy
-    --follow --verify --cert --cert-key --timeout --check-status --ignore-stdin
-    --help --version --traceback --debug --raw"
-    COMPREPLY=( $( compgen -W "$options" -- "$cur_word" ) )
-}

extras/scripts/completion/bash.py

@@ -0,0 +1,83 @@
+from enum import Enum
+from functools import singledispatch
+
+from completion_flow import (
+    And,
+    Check,
+    Condition,
+    If,
+    Node,
+    Not,
+    Suggest,
+    Suggestion,
+    Variable,
+    generate_flow,
+)
+
+
+class BashVariable(str, Enum):
+    CURRENT = 'COMP_CWORD'
+    NORMARG = 'NORMARG'
+    CURRENT_WORD = 'cur_word'
+    PREDECESSOR = 'prev_word'
+    METHODS = 'METHODS'
+
+
+SUGGESTION_TO_FUNCTION = {
+    Suggestion.METHOD: '_http_complete_methods',
+    Suggestion.URL: '_http_complete_url',
+    Suggestion.REQUEST_ITEM: '_httpie_complete_request_item',
+}
+
+
+@singledispatch
+def compile_bash(node: Node) -> ...:
+    raise NotImplementedError(f'{type(node)} is not supported')
+
+
+@compile_bash.register(If)
+def compile_if(node: If) -> str:
+    check = compile_bash(node.check)
+    action = compile_bash(node.action)
+    return f'if {check}; then\n    {action}\nfi'
+
+
+@compile_bash.register(Check)
+def compile_check(node: Check) -> str:
+    args = [
+        BashVariable(arg.name) if isinstance(arg, Variable) else arg
+        for arg in node.args
+    ]
+
+    if node.condition is Condition.POSITION_EQ:
+        return f'(( {BashVariable.CURRENT} == {BashVariable.NORMARG} + {args[0]} ))'
+    elif node.condition is Condition.POSITION_GE:
+        return f'(( {BashVariable.CURRENT} >= {BashVariable.NORMARG} + {args[0]} ))'
+    elif node.condition is Condition.CONTAINS_PREDECESSOR:
+        parts = [
+            '[[ ',
+            '" ${',
+            BashVariable.METHODS,
+            '[*]} " =~ " ${',
+            BashVariable.PREDECESSOR,
+            '} " ]]',
+        ]
+        return ''.join(parts)
+
+
+@compile_bash.register(And)
+def compile_and(node: And) -> str:
+    return ' && '.join(compile_bash(check) for check in node.checks)
+
+
+@compile_bash.register(Not)
+def compile_not(node: Not) -> str:
+    return f'! {compile_bash(node.check)}'
+
+
+@compile_bash.register(Suggest)
+def compile_suggest(node: Suggest) -> str:
+    return (
+        SUGGESTION_TO_FUNCTION[node.suggestion]
+        + f' "${BashVariable.CURRENT_WORD}"'
+    )

extras/scripts/completion/completion_flow.py

@@ -1,6 +1,6 @@
 from dataclasses import dataclass, field
 from enum import Enum, auto
-from typing import List, Iterator
+from typing import Iterator, List
 
 
 class Condition(Enum):

extras/scripts/completion/generate_completion.py

@@ -1,18 +1,17 @@
-from atexit import register
 import functools
 import string
 import textwrap
-
-from jinja2 import Template
+from atexit import register
 from pathlib import Path
-from typing import Any, Dict, Callable, TypeVar
+from typing import Any, Callable, Dict, TypeVar
+
+from completion_flow import generate_flow
+from jinja2 import Template
 
 from httpie.cli.constants import SEPARATOR_FILE_UPLOAD
 from httpie.cli.definition import options
 from httpie.cli.options import Argument, ParserSpec
 
-from completion_flow import generate_flow
-
 T = TypeVar('T')
 
 EXTRAS_DIR = Path(__file__).parent.parent.parent
@@ -202,7 +201,7 @@ def zsh_completer(spec: ParserSpec) -> Dict[str, Any]:
     return {
         'escape_zsh': escape_zsh,
         'serialize_argument_to_zsh': serialize_argument_to_zsh,
-        'compile_zsh': compile_zsh
+        'compile_zsh': compile_zsh,
     }
 
 
@@ -213,6 +212,15 @@ def fish_completer(spec: ParserSpec) -> Dict[str, Any]:
     }
 
 
+@use_template('bash')
+def fish_completer(spec: ParserSpec) -> Dict[str, Any]:
+    from bash import compile_bash
+
+    return {
+        'compile_bash': compile_bash,
+    }
+
+
 def main():
     for shell_type, completer in COMPLETERS.items():
         print(f'Generating {shell_type} completer.')

extras/scripts/completion/zsh.py

@@ -1,17 +1,16 @@
-from functools import singledispatch
 from enum import Enum
-from lib2to3.pgen2.pgen import generate_grammar
+from functools import singledispatch
+
 from completion_flow import (
-    Node,
-    Check,
-    Suggest,
-    Variable,
-    Condition,
-    Suggestion,
-    If,
     And,
+    Check,
+    Condition,
+    If,
+    Node,
     Not,
-    generate_flow,
+    Suggest,
+    Suggestion,
+    Variable,
 )