Completed
Push — master ( 0cfff3...7d062d )
by Greg
02:05
created

Application::flipProjectsArray()   A

Complexity

Conditions 1
Paths 1

Size

Total Lines 6
Code Lines 4

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 6
rs 9.4285
c 0
b 0
f 0
cc 1
eloc 4
nc 1
nop 1
1
<?php
2
3
namespace Consolidation\Cgr;
4
5
class Application
6
{
7
    protected $outputFile = '';
8
9
    /**
10
     * Run the cgr tool, a safer alternative to `composer global require`.
11
     *
12
     * @param array $argv The global $argv array passed in by PHP
13
     * @param string $home The path to the user's home directory
14
     * @return integer
15
     */
16
    public function run($argv, $home)
17
    {
18
        $optionDefaultValues = $this->getDefaultOptionValues($home);
19
        $optionDefaultValues = $this->overlayEnvironmentValues($optionDefaultValues);
20
21
        list($argv, $options) = $this->parseOutOurOptions($argv, $optionDefaultValues);
22
        $commandList = $this->separateProjectAndGetCommandList($argv, $home, $options);
23
        if (empty($commandList)) {
24
            return 1;
25
        }
26
        return $this->runCommandList($commandList, $options);
0 ignored issues
show
Documentation introduced by
$commandList is of type object<Consolidation\Cgr\CommandToExec>, but the function expects a array.

It seems like the type of the argument is not accepted by the function/method which you are calling.

In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.

We suggest to add an explicit type cast like in the following example:

function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
Loading history...
27
    }
28
29
    /**
30
     * Set up output redirection. Used by tests.
31
     */
32
    public function setOutputFile($outputFile)
33
    {
34
        $this->outputFile = $outputFile;
35
    }
36
37
    /**
38
     * Figure out everything we're going to do, but don't do any of it
39
     * yet, just return the command objects to run.
40
     */
41
    public function parseArgvAndGetCommandList($argv, $home)
42
    {
43
        $optionDefaultValues = $this->getDefaultOptionValues($home);
44
        $optionDefaultValues = $this->overlayEnvironmentValues($optionDefaultValues);
45
46
        list($argv, $options) = $this->parseOutOurOptions($argv, $optionDefaultValues);
47
        return $this->separateProjectAndGetCommandList($argv, $home, $options);
48
    }
49
50
    /**
51
     * Figure out everything we're going to do, but don't do any of it
52
     * yet, just return the command objects to run.
53
     */
54
    public function separateProjectAndGetCommandList($argv, $home, $options)
0 ignored issues
show
Unused Code introduced by
The parameter $home is not used and could be removed.

This check looks from parameters that have been defined for a function or method, but which are not used in the method body.

Loading history...
55
    {
56
        list($command, $projects, $composerArgs) = $this->separateProjectsFromArgs($argv, $options);
57
        $commandList = $this->getCommandsToExec($command, $composerArgs, $projects, $options);
58
        return $commandList;
59
    }
60
61
    /**
62
     * Run all of the commands in a list.  Abort early if any fail.
63
     *
64
     * @param array $commandList An array of CommandToExec
65
     * @return integer
66
     */
67
    public function runCommandList($commandList, $options)
0 ignored issues
show
Unused Code introduced by
The parameter $options is not used and could be removed.

This check looks from parameters that have been defined for a function or method, but which are not used in the method body.

Loading history...
68
    {
69
        foreach ($commandList as $command) {
70
            $exitCode = $command->run($this->outputFile);
71
            if ($exitCode) {
72
                return $exitCode;
73
            }
74
        }
75
        return 0;
76
    }
77
78
    /**
79
     * Return an array containing a list of commands to execute.  Depending on
80
     * the composition of the aguments and projects parameters, this list will
81
     * contain either a single command string to call through to composer (if
82
     * cgr is being used as a composer alias), or it will contain a list of
83
     * appropriate replacement 'composer global require' commands that install
84
     * each project in its own installation directory, while installing each
85
     * projects' binaries in the global Composer bin directory,
86
     * ~/.composer/vendor/bin.
87
     *
88
     * @param array $composerArgs
89
     * @param array $projects
90
     * @param array $options
91
     * @return CommandToExec
92
     */
93
    public function getCommandsToExec($command, $composerArgs, $projects, $options)
94
    {
95
        $execPath = $options['composer-path'];
96
        // If command was not 'global require', 'global update' or
97
        // 'global remove', then call through to the standard composer
98
        // with all of the original args.
99
        if (empty($command)) {
100
            return array(new CommandToExec($execPath, $composerArgs));
0 ignored issues
show
Bug Best Practice introduced by
The return type of return array(new \Consol...cPath, $composerArgs)); (Consolidation\Cgr\CommandToExec[]) is incompatible with the return type documented by Consolidation\Cgr\Application::getCommandsToExec of type Consolidation\Cgr\CommandToExec.

If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.

Let’s take a look at an example:

class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}

Our function my_function expects a Post object, and outputs the author of the post. The base class Post returns a simple string and outputting a simple string will work just fine. However, the child class BlogPost which is a sub-type of Post instead decided to return an object, and is therefore violating the SOLID principles. If a BlogPost were passed to my_function, PHP would not complain, but ultimately fail when executing the strtoupper call in its body.

Loading history...
101
        }
102
        // Call requireCommand, updateCommand, or removeCommand, as appropriate.
103
        $methodName = "{$command}Command";
104
        if (method_exists($this, $methodName)) {
105
            return $this->$methodName($execPath, $composerArgs, $projects, $options);
106
        } else {
107
            // If there is no specific implementation for the requested command, then call 'generalCommand'.
108
            return $this->generalCommand($command, $execPath, $composerArgs, $projects, $options);
0 ignored issues
show
Bug Best Practice introduced by
The return type of return $this->generalCom..., $projects, $options); (array) is incompatible with the return type documented by Consolidation\Cgr\Application::getCommandsToExec of type Consolidation\Cgr\CommandToExec.

If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.

Let’s take a look at an example:

class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}

Our function my_function expects a Post object, and outputs the author of the post. The base class Post returns a simple string and outputting a simple string will work just fine. However, the child class BlogPost which is a sub-type of Post instead decided to return an object, and is therefore violating the SOLID principles. If a BlogPost were passed to my_function, PHP would not complain, but ultimately fail when executing the strtoupper call in its body.

Loading history...
109
        }
110
    }
111
112
    /**
113
     * Return our list of default option values, with paths relative to
114
     * the provided home directory.
115
     * @param string $home The user's home directory
116
     * @return array
117
     */
118
    public function getDefaultOptionValues($home)
119
    {
120
        return array(
121
            'composer' => false,
122
            'composer-path' => 'composer',
123
            'base-dir' => "$home/.composer/global",
124
            'bin-dir' => "$home/.composer/vendor/bin",
125
        );
126
    }
127
128
    /**
129
     * Replace option default values with the corresponding
130
     * environment variable value, if it is set.
131
     */
132
    protected function overlayEnvironmentValues($defaults)
133
    {
134
        foreach ($defaults as $key => $value) {
135
            $envKey = 'CGR_' . strtoupper(strtr($key, '-', '_'));
136
            $envValue = getenv($envKey);
137
            if ($envValue) {
138
                $defaults[$key] = $envValue;
139
            }
140
        }
141
142
        return $defaults;
143
    }
144
145
    /**
146
     * We use our own special-purpose argv parser. The options that apply
147
     * to this tool are identified by a simple associative array, where
148
     * the key is the option name, and the value is its default value.
149
     * The result of this function is an array of two items containing:
150
     *  - An array of the items in $argv not used to set an option value
151
     *  - An array of options containing the user-specified or default values
152
     *
153
     * @param array $argv The global $argv passed in by php
154
     * @param array $optionDefaultValues An associative array
155
     * @return array
156
     */
157
    public function parseOutOurOptions($argv, $optionDefaultValues)
158
    {
159
        $argv0 = array_shift($argv);
160
        $options['composer'] = (strpos($argv0, 'composer') !== false);
0 ignored issues
show
Coding Style Comprehensibility introduced by
$options was never initialized. Although not strictly required by PHP, it is generally a good practice to add $options = array(); before regardless.

Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.

Let’s take a look at an example:

foreach ($collection as $item) {
    $myArray['foo'] = $item->getFoo();

    if ($item->hasBar()) {
        $myArray['bar'] = $item->getBar();
    }

    // do something with $myArray
}

As you can see in this example, the array $myArray is initialized the first time when the foreach loop is entered. You can also see that the value of the bar key is only written conditionally; thus, its value might result from a previous iteration.

This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.

Loading history...
161
        $passAlongArgvItems = array();
162
        $options = array();
163
        while (!empty($argv)) {
164
            $arg = array_shift($argv);
165
            if ((substr($arg, 0, 2) == '--') && array_key_exists(substr($arg, 2), $optionDefaultValues)) {
166
                $options[substr($arg, 2)] = array_shift($argv);
167
            } else {
168
                $passAlongArgvItems[] = $arg;
169
            }
170
        }
171
        return array($passAlongArgvItems, $options + $optionDefaultValues);
172
    }
173
174
    /**
175
     * After our options are removed by parseOutOurOptions, those items remaining
176
     * in $argv will be separated into a list of projects and versions, and
177
     * anything else that is not a project:version. Returns an array of two
178
     * items containing:
179
     *  - An associative array, where the key is the project name and the value
180
     *    is the version (or an empty string, if no version was specified)
181
     *  - The remaining $argv items not used to build the projects array.
182
     *
183
     * @param array $argv The $argv array from parseOutOurOptions()
184
     * @return array
185
     */
186
    public function separateProjectsFromArgs($argv, $options)
187
    {
188
        $cgrCommands = array('require', 'update', 'remove');
189
        $command = 'require';
190
        $composerArgs = array();
191
        $projects = array();
192
        $globalMode = !$options['composer'];
193
        foreach ($argv as $arg) {
194
            if ($arg[0] == '-') {
195
                // Any flags (first character is '-') will just be passed
196
                // through to to composer. Flags interpreted by cgr have
197
                // already been removed from $argv.
198
                $composerArgs[] = $arg;
199
            } elseif (strpos($arg, '/') !== false) {
200
                // Arguments containing a '/' name projects.  We will split
201
                // the project from its version, allowing the separator
202
                // character to be either a '=' or a ':', and then store the
203
                // result in the $projects array.
204
                $projectAndVersion = explode(':', strtr($arg, '=', ':'), 2) + array('', '');
205
                list($project, $version) = $projectAndVersion;
206
                $projects[$project] = $version;
207
            } elseif ($this->isComposerVersion($arg)) {
208
                // If an argument is a composer version, then we will alter
209
                // the last project we saw, attaching this version to it.
210
                // This allows us to handle 'a/b:1.0' and 'a/b 1.0' equivalently.
211
                $keys = array_keys($projects);
212
                $lastProject = array_pop($keys);
213
                unset($projects[$lastProject]);
214
                $projects[$lastProject] = $arg;
215
            } elseif ($arg == 'global') {
216
                // Make note if we see the 'global' command.
217
                $globalMode = true;
218
            } else {
219
                // If we see any command other than 'global [require|update|remove]',
220
                // then we will pass *all* of the arguments through to
221
                // composer unchanged. We return an empty projects array
222
                // to indicate that this should be a pass-through call
223
                // to composer, rather than one or more calls to
224
                // 'composer require' to install global projects.
225
                if ((!$globalMode) || (!in_array($arg, $cgrCommands))) {
226
                    return array('', array(), $argv);
227
                }
228
                // Remember which command we saw
229
                $command = $arg;
230
            }
231
        }
232
        return array($command, $projects, $composerArgs);
233
    }
234
235
    /**
236
     * Provide a safer version of `composer global require`.  Each project
237
     * listed in $projects will be installed into its own project directory.
238
     * The binaries from each project will still be placed in the global
239
     * composer bin directory.
240
     *
241
     * @param string $composerCommand The composer command to run e.g. require
242
     * @param string $execPath The path to composer
243
     * @param array $composerArgs Anything from the global $argv to be passed
244
     *   on to Composer
245
     * @param array $projects A list of projects to install, with the key
246
     *   specifying the project name, and the value specifying its version.
247
     * @param array $options User options from the command line; see
248
     *   $optionDefaultValues in the main() function.
249
     * @return array
250
     */
251
    public function generalCommand($composerCommand, $execPath, $composerArgs, $projects, $options)
252
    {
253
        $globalBaseDir = $options['base-dir'];
254
        $binDir = $options['bin-dir'];
255
        $env = array("COMPOSER_BIN_DIR" => $binDir);
256
        $result = array();
257
        foreach ($projects as $project => $version) {
258
            $installLocation = "$globalBaseDir/$project";
259
            $projectWithVersion = $this->projectWithVersion($project, $version);
260
            $commandToExec = $this->buildGlobalCommand($composerCommand, $execPath, $composerArgs, $projectWithVersion, $env, $installLocation);
261
            $result[] = $commandToExec;
262
        }
263
        return $result;
264
    }
265
266
    /**
267
     * Run `composer global update`. Not only do we want to update the
268
     * "global" Composer project, we also want to update all of the
269
     * "isolated" projects installed via cgr in ~/.composer/global.
270
     *
271
     * @param string $command The path to composer
0 ignored issues
show
Bug introduced by
There is no parameter named $command. Was it maybe removed?

This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.

Consider the following example. The parameter $italy is not defined by the method finale(...).

/**
 * @param array $germany
 * @param array $island
 * @param array $italy
 */
function finale($germany, $island) {
    return "2:1";
}

The most likely cause is that the parameter was removed, but the annotation was not.

Loading history...
272
     * @param array $composerArgs Anything from the global $argv to be passed
273
     *   on to Composer
274
     * @param array $projects A list of projects to update.
275
     * @param array $options User options from the command line; see
276
     *   $optionDefaultValues in the main() function.
277
     * @return array
278
     */
279
    public function updateCommand($execPath, $composerArgs, $projects, $options)
280
    {
281
        // If 'projects' list is empty, make a list of everything currently installed
282
        if (empty($projects)) {
283
            $projects = FileSystemUtils::allInstalledProjectsInBaseDir($options['base-dir']);
284
            $projects = $this->flipProjectsArray($projects);
285
        }
286
        return $this->generalCommand('update', $execPath, $composerArgs, $projects, $options);
287
    }
288
289
    /**
290
     * Convert from an array of projects to an array where the key is the
291
     * project name, and the value (version) is an empty string.
292
     *
293
     * @param string[] $projects
294
     * @return array
295
     */
296
    public function flipProjectsArray($projects)
297
    {
298
        return array_map(function () {
299
            return '';
300
        }, array_flip($projects));
301
    }
302
303
    /**
304
     * Return $project:$version, or just $project if there is no $version.
305
     *
306
     * @param string $project The project to install
307
     * @param string $version The version desired
308
     * @return string
309
     */
310
    public function projectWithVersion($project, $version)
311
    {
312
        if (empty($version)) {
313
            return $project;
314
        }
315
        return "$project:$version";
316
    }
317
318
    /**
319
     * Generate command string to call `composer require` to install one project.
320
     *
321
     * @param string $command The path to composer
0 ignored issues
show
Documentation introduced by
There is no parameter named $command. Did you maybe mean $composerCommand?

This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function. It has, however, found a similar but not annotated parameter which might be a good fit.

Consider the following example. The parameter $ireland is not defined by the method finale(...).

/**
 * @param array $germany
 * @param array $ireland
 */
function finale($germany, $island) {
    return "2:1";
}

The most likely cause is that the parameter was changed, but the annotation was not.

Loading history...
322
     * @param array $composerArgs The arguments to pass to composer
323
     * @param string $projectWithVersion The project:version to install
324
     * @param array $env Environment to set prior to exec
325
     * @param string $installLocation Location to install the project
326
     * @return CommandToExec
327
     */
328
    public function buildGlobalCommand($composerCommand, $execPath, $composerArgs, $projectWithVersion, $env, $installLocation)
329
    {
330
        $projectSpecificArgs = array("--working-dir=$installLocation", $composerCommand, $projectWithVersion);
331
        $arguments = array_merge($composerArgs, $projectSpecificArgs);
332
        return new CommandToExec($execPath, $arguments, $env, $installLocation);
333
    }
334
335
    /**
336
     * Identify an argument that could be a Composer version string.
337
     *
338
     * @param string $arg The argument to test
339
     * @return boolean
340
     */
341
    public function isComposerVersion($arg)
342
    {
343
        $specialVersionChars = array('^', '~', '<', '>');
344
        return is_numeric($arg[0]) || in_array($arg[0], $specialVersionChars);
345
    }
346
}
347