HookFactory::generateHook() - Code Metrics - stecman/symfony-console-completion - Measure and Improve Code Quality continuously with Scrutinizer

HookFactory::generateHook() A
last analyzed 2020-01-23 21:15 UTC

↳ Parent: HookFactory

Complexity

Conditions	4
Paths	5

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	38
rs	9.312
c	0
b	0
f	0
cc	4
nc	5
nop	4

<?php


namespace Stecman\Component\Symfony\Console\BashCompletion;

final class HookFactory
{
    /**
     * Hook scripts
     *
     * These are shell-specific scripts that pass required information from that shell's
     * completion system to the interface of the completion command in this module.
     *
     * The following placeholders are replaced with their value at runtime:
     *
     *     %%function_name%%      - name of the generated shell function run for completion
     *     %%program_name%%       - command name completion will be enabled for
     *     %%program_path%%       - path to program the completion is for/generated by
     *     %%completion_command%% - command to be run to compute completions
     *
     * NOTE: Comments are stripped out by HookFactory::stripComments as eval reads
     *       input as a single line, causing it to break if comments are included.
     *       While comments work using `... | source /dev/stdin`, existing installations
     *       are likely using eval as it's been part of the instructions for a while.
     *
     * @var array
     */
    protected static $hooks = array(
        // BASH Hook
        'bash' => <<<'END'
# BASH completion for %%program_path%%
function %%function_name%% {

    # Copy BASH's completion variables to the ones the completion command expects
    # These line up exactly as the library was originally designed for BASH
    local CMDLINE_CONTENTS="$COMP_LINE";
    local CMDLINE_CURSOR_INDEX="$COMP_POINT";
    local CMDLINE_WORDBREAKS="$COMP_WORDBREAKS";

    export CMDLINE_CONTENTS CMDLINE_CURSOR_INDEX CMDLINE_WORDBREAKS;

    local RESULT STATUS;

    # Force splitting by newline instead of default delimiters
    local IFS=$'\n';

    RESULT="$(%%completion_command%% </dev/null)";
    STATUS=$?;

    local cur mail_check_backup;

    mail_check_backup=$MAILCHECK;
    MAILCHECK=-1;

    _get_comp_words_by_ref -n : cur;

    # Check if shell provided path completion is requested
    # @see Completion\ShellPathCompletion
    if [ $STATUS -eq 200 ]; then
        # Turn file/dir completion on temporarily and give control back to BASH
        compopt -o default;
        return 0;

    # Bail out if PHP didn't exit cleanly
    elif [ $STATUS -ne 0 ]; then
        echo -e "$RESULT";
        return $?;
    fi;

    COMPREPLY=(`compgen -W "$RESULT" -- $cur`);

    __ltrim_colon_completions "$cur";

    MAILCHECK=mail_check_backup;
};

if [ "$(type -t _get_comp_words_by_ref)" == "function" ]; then
    complete -F %%function_name%% "%%program_name%%";
else
    >&2 echo "Completion was not registered for %%program_name%%:";
    >&2 echo "The 'bash-completion' package is required but doesn't appear to be installed.";
fi;
END

        // ZSH Hook
        , 'zsh' => <<<'END'
# ZSH completion for %%program_path%%
function %%function_name%% {
    local -x CMDLINE_CONTENTS="$words";
    local -x CMDLINE_CURSOR_INDEX;
    (( CMDLINE_CURSOR_INDEX = ${#${(j. .)words[1,CURRENT]}} ));

    local RESULT STATUS;
    RESULT=("${(@f)$( %%completion_command%% )}");
    STATUS=$?;

    # Check if shell provided path completion is requested
    # @see Completion\ShellPathCompletion
    if [ $STATUS -eq 200 ]; then
        _path_files;
        return 0;

    # Bail out if PHP didn't exit cleanly
    elif [ $STATUS -ne 0 ]; then
        echo -e "$RESULT";
        return $?;
    fi;

    compadd -- $RESULT;
};

compdef %%function_name%% "%%program_name%%";
END
    );

    /**
     * Return the names of shells that have hooks
     *
     * @return string[]
     */
    public static function getShellTypes()
    {
        return array_keys(self::$hooks);
    }

    /**
     * Return a completion hook for the specified shell type
     *
     * @param string $type - a key from self::$hooks
     * @param string $programPath
     * @param string $programName
     * @param bool   $multiple
     *
     * @return string
     */
    public function generateHook($type, $programPath, $programName = null, $multiple = false)
    {
        if (!isset(self::$hooks[$type])) {
            throw new \RuntimeException(sprintf(
                "Cannot generate hook for unknown shell type '%s'. Available hooks are: %s",
                $type,
                implode(', ', self::getShellTypes())
            ));
        }

        // Use the program path if an alias/name is not given
        $programName = $programName ?: $programPath;

        if ($multiple) {
            $completionCommand = '$1 _completion';
        } else {
            $completionCommand = $programPath . ' _completion';
        }

        // Pass shell type during completion so output can be encoded if the shell requires it
        $completionCommand .= " --shell-type $type";

        return str_replace(
            array(
                '%%function_name%%',
                '%%program_name%%',
                '%%program_path%%',
                '%%completion_command%%',
            ),
            array(
                $this->generateFunctionName($programPath, $programName),
                $programName,
                $programPath,
                $completionCommand
            ),
            $this->stripComments(self::$hooks[$type])
        );
    }

    /**
     * Generate a function name that is unlikely to conflict with other generated function names in the same shell
     */
    protected function generateFunctionName($programPath, $programName)
    {
        return sprintf(
            '_%s_%s_complete',
            $this->sanitiseForFunctionName(basename($programName)),
            substr(md5($programPath), 0, 16)
        );
    }


    /**
     * Make a string safe for use as a shell function name
     *
     * @param string $name
     * @return string
     */
    protected function sanitiseForFunctionName($name)
    {
        $name = str_replace('-', '_', $name);
        return preg_replace('/[^A-Za-z0-9_]+/', '', $name);
    }

    /**
     * Strip '#' style comments from a string
     *
     * BASH's eval doesn't work with comments as it removes line breaks, so comments have to be stripped out
     * for this method of sourcing the hook to work. Eval seems to be the most reliable method of getting a
     * hook into a shell, so while it would be nice to render comments, this stripping is required for now.
     *
     * @param string $script
     * @return string
     */
    protected function stripComments($script)
    {
        return preg_replace('/(^\s*\#.*$)/m', '', $script);
    }
}


1			<?php
2
3
4			namespace Stecman\Component\Symfony\Console\BashCompletion;
5
6			final class HookFactory
7			{
8			/**
9			* Hook scripts
10			*
11			* These are shell-specific scripts that pass required information from that shell's
12			* completion system to the interface of the completion command in this module.
13			*
14			* The following placeholders are replaced with their value at runtime:
15			*
16			* %%function_name%% - name of the generated shell function run for completion
17			* %%program_name%% - command name completion will be enabled for
18			* %%program_path%% - path to program the completion is for/generated by
19			* %%completion_command%% - command to be run to compute completions
20			*
21			* NOTE: Comments are stripped out by HookFactory::stripComments as eval reads
22			* input as a single line, causing it to break if comments are included.
23			* While comments work using `... \| source /dev/stdin`, existing installations
24			* are likely using eval as it's been part of the instructions for a while.
25			*
26			* @var array
27			*/
28			protected static $hooks = array(
29			// BASH Hook
30			'bash' => <<<'END'
31			# BASH completion for %%program_path%%
32			function %%function_name%% {
33
34			# Copy BASH's completion variables to the ones the completion command expects
35			# These line up exactly as the library was originally designed for BASH
36			local CMDLINE_CONTENTS="$COMP_LINE";
37			local CMDLINE_CURSOR_INDEX="$COMP_POINT";
38			local CMDLINE_WORDBREAKS="$COMP_WORDBREAKS";
39
40			export CMDLINE_CONTENTS CMDLINE_CURSOR_INDEX CMDLINE_WORDBREAKS;
41
42			local RESULT STATUS;
43
44			# Force splitting by newline instead of default delimiters
45			local IFS=$'\n';
46
47			RESULT="$(%%completion_command%% </dev/null)";
48			STATUS=$?;
49
50			local cur mail_check_backup;
51
52			mail_check_backup=$MAILCHECK;
53			MAILCHECK=-1;
54
55			_get_comp_words_by_ref -n : cur;
56
57			# Check if shell provided path completion is requested
58			# @see Completion\ShellPathCompletion
59			if [ $STATUS -eq 200 ]; then
60			# Turn file/dir completion on temporarily and give control back to BASH
61			compopt -o default;
62			return 0;
63
64			# Bail out if PHP didn't exit cleanly
65			elif [ $STATUS -ne 0 ]; then
66			echo -e "$RESULT";
67			return $?;
68			fi;
69
70			COMPREPLY=(`compgen -W "$RESULT" -- $cur`);
71
72			__ltrim_colon_completions "$cur";
73
74			MAILCHECK=mail_check_backup;
75			};
76
77			if [ "$(type -t _get_comp_words_by_ref)" == "function" ]; then
78			complete -F %%function_name%% "%%program_name%%";
79			else
80			>&2 echo "Completion was not registered for %%program_name%%:";
81			>&2 echo "The 'bash-completion' package is required but doesn't appear to be installed.";
82			fi;
83			END
84
85			// ZSH Hook
86			, 'zsh' => <<<'END'
87			# ZSH completion for %%program_path%%
88			function %%function_name%% {
89			local -x CMDLINE_CONTENTS="$words";
90			local -x CMDLINE_CURSOR_INDEX;
91			(( CMDLINE_CURSOR_INDEX = ${#${(j. .)words[1,CURRENT]}} ));
92
93			local RESULT STATUS;
94			RESULT=("${(@f)$( %%completion_command%% )}");
95			STATUS=$?;
96
97			# Check if shell provided path completion is requested
98			# @see Completion\ShellPathCompletion
99			if [ $STATUS -eq 200 ]; then
100			_path_files;
101			return 0;
102
103			# Bail out if PHP didn't exit cleanly
104			elif [ $STATUS -ne 0 ]; then
105			echo -e "$RESULT";
106			return $?;
107			fi;
108
109			compadd -- $RESULT;
110			};
111
112			compdef %%function_name%% "%%program_name%%";
113			END
114			);
115
116			/**
117			* Return the names of shells that have hooks
118			*
119			* @return string[]
120			*/
121			public static function getShellTypes()
122			{
123			return array_keys(self::$hooks);
124			}
125
126			/**
127			* Return a completion hook for the specified shell type
128			*
129			* @param string $type - a key from self::$hooks
130			* @param string $programPath
131			* @param string $programName
132			* @param bool $multiple
133			*
134			* @return string
135			*/
136			public function generateHook($type, $programPath, $programName = null, $multiple = false)
137			{
138			if (!isset(self::$hooks[$type])) {
139			throw new \RuntimeException(sprintf(
140			"Cannot generate hook for unknown shell type '%s'. Available hooks are: %s",
141			$type,
142			implode(', ', self::getShellTypes())
143			));
144			}
145
146			// Use the program path if an alias/name is not given
147			$programName = $programName ?: $programPath;
148
149			if ($multiple) {
150			$completionCommand = '$1 _completion';
151			} else {
152			$completionCommand = $programPath . ' _completion';
153			}
154
155			// Pass shell type during completion so output can be encoded if the shell requires it
156			$completionCommand .= " --shell-type $type";
157
158			return str_replace(
159			array(
160			'%%function_name%%',
161			'%%program_name%%',
162			'%%program_path%%',
163			'%%completion_command%%',
164			),
165			array(
166			$this->generateFunctionName($programPath, $programName),
167			$programName,
168			$programPath,
169			$completionCommand
170			),
171			$this->stripComments(self::$hooks[$type])
172			);
173			}
174
175			/**
176			* Generate a function name that is unlikely to conflict with other generated function names in the same shell
177			*/
178			protected function generateFunctionName($programPath, $programName)
179			{
180			return sprintf(
181			'_%s_%s_complete',
182			$this->sanitiseForFunctionName(basename($programName)),
183			substr(md5($programPath), 0, 16)
184			);
185			}
186
187
188			/**
189			* Make a string safe for use as a shell function name
190			*
191			* @param string $name
192			* @return string
193			*/
194			protected function sanitiseForFunctionName($name)
195			{
196			$name = str_replace('-', '_', $name);
197			return preg_replace('/[^A-Za-z0-9_]+/', '', $name);
198			}
199
200			/**
201			* Strip '#' style comments from a string
202			*
203			* BASH's eval doesn't work with comments as it removes line breaks, so comments have to be stripped out
204			* for this method of sourcing the hook to work. Eval seems to be the most reliable method of getting a
205			* hook into a shell, so while it would be nice to render comments, this stripping is required for now.
206			*
207			* @param string $script
208			* @return string
209			*/
210			protected function stripComments($script)
211			{
212			return preg_replace('/(^\s\#.$)/m', '', $script);
213			}
214			}
215

stecman / symfony-console-completion

HookFactory::generateHook() A last analyzed 2020-01-23 21:15 UTC

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HookFactory::generateHook() A
last analyzed 2020-01-23 21:15 UTC