The document discusses issues encountered while using Composer, specifically related to the package 'monolog/monolog' not being found or installable due to potential typos or version availability. It provides insights on troubleshooting installation failures and suggests proper version selection practices. Additionally, it highlights the importance of dependency management, usage examples, and the role of Composer in library publishing and consumer scenarios.

1. Composer
the right way
@rdohms
Rafael Dohms

2. photo: smileymanwithahat

5. photo: Rob Allen

6. photo: 18millionpixels

7. Library Publisher
photo: 18millionpixels

8. Library Publisher
Library Consumer
photo: 18millionpixels

9. Library Publisher
Library
Library Consumer
photo: 18millionpixels

10. Library Publisher
Library
Library Consumer
Packagist
photo: 18millionpixels

11. photo: 18millionpixels

12. {
"require": {
"monolog/monolog": “2.0”
}
}
photo: 18millionpixels

13. {
"require": {
"monolog/monolog": “2.0”
}
}
{
"name": “monolog/monolog”
...
}
photo: 18millionpixels

14. {
"require": {
"monolog/monolog": “2.0”
}
}
{
"name": “monolog/monolog”
...
}
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- The requested package monolog/monolog could not be found in any version, there may be a typo in the package name.
Potential causes:
- A typo in the package name
- The package is not available in a stable-enough version according to your minimum-stability setting
see <https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion> for more details.
Read <http://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.
Installation failed, reverting ./composer.json to its original content.
photo: 18millionpixels

15. {
"require": {
"monolog/monolog": “2.0”
}
}
{
"name": “monolog/monolog”
...
}
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- The requested package monolog/monolog could not be found in any version, there may be a typo in the package name.
Potential causes:
- A typo in the package name
- The package is not available in a stable-enough version according to your minimum-stability setting
see <https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion> for more details.
Read <http://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.
Installation failed, reverting ./composer.json to its original content.
___
~1.1
photo: 18millionpixels

16. {
"require": {
"monolog/monolog": “2.0”
}
}
{
"name": “monolog/monolog”
...
}
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- The requested package monolog/monolog could not be found in any version, there may be a typo in the package name.
Potential causes:
- A typo in the package name
- The package is not available in a stable-enough version according to your minimum-stability setting
see <https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion> for more details.
Read <http://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.
Installation failed, reverting ./composer.json to its original content.
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
- Installing psr/log (1.0.0)
Loading from cache
- Installing monolog/monolog (1.11.0)
Downloading: 100%
monolog/monolog suggests installing graylog2/gelf-php (Allow sending log messages to a GrayLog2 server)
[...]
monolog/monolog suggests installing ext-mongo (Allow sending log messages to a MongoDB server)
monolog/monolog suggests installing aws/aws-sdk-php (Allow sending log messages to AWS services like DynamoDB)
monolog/monolog suggests installing rollbar/rollbar (Allow sending log messages to Rollbar)
Writing lock file
Generating autoload files
___
~1.1
photo: 18millionpixels

17. composer

18. composercomposer.json!

19. composercomposer.json!
composer.lock!

20. composercomposer.json!
composer.lock!

21. discovery Packagist
"
composercomposer.json!
composer.lock!

22. discovery sourcePackagist
"
Repository
#
composercomposer.json!
composer.lock!

23. discovery source
installation
Packagist
"
Vendor
Folder
$
Repository
#
composercomposer.json!
composer.lock!

24. 1 574 456 686

25. 1 574 456 686+

26. 1 574 456 686one billion, five hundred seventy-four million, four
hundred fifty-six thousand, six hundred eighty-six
+

27. $ composer init
Library Publisher

28. $ composer init
Library Publisher
$ composer require <vendor>/<package>
Library Consumer

29. $ composer require monolog/monolog
Tip

30. $ composer require monolog/monolog
Tip
Using version ~1.11 for monolog/monolog

31. $ composer require monolog/monolog --sort-packages
Tip

32. Library Publishers
Composer for

33. Library Publisher Unique vendor names
vendor / package

34. Library Publisher Unique vendor names
pick your own
unique vendor

35. Library Publisher Unique vendor names
or join a collective

36. README!
CHANGELOG%
LICENSE&
Library Publisher What’s in your library?

37. README!
CHANGELOG%
LICENSE&
Library Publisher What’s in your library?
' What problem does it solve?
' Usage examples
' Install instructions
' How can I contribute?

38. README!
CHANGELOG%
LICENSE&
Library Publisher What’s in your library?
' List relevant changes
' Make BC breaks prominent
' Show examples of how to upgrade
' What problem does it solve?
' Usage examples
' Install instructions
' How can I contribute?

39. README!
CHANGELOG%
LICENSE&
Library Publisher What’s in your library?
' List relevant changes
' Make BC breaks prominent
' Show examples of how to upgrade
' Pick one that reflects your values
' choosealicense.com can help
' What problem does it solve?
' Usage examples
' Install instructions
' How can I contribute?

40. Library Publisher Semantic Versioning
1 . 2 3.major minor patch

41. Library Publisher Semantic Versioning
1 . 2 3.major minor patch
Bug Fixes

42. Library Publisher Semantic Versioning
1 . 2 3.major minor patch
New Features Bug Fixes

43. Library Publisher Semantic Versioning
1 . 2 3.major minor patch
API / BC
Breaks
New Features Bug Fixes

44. Library Publisher Tagging
Please, tag your
releases.

45. Library Publisher Tagging
Please, tag your
releases.
often!

46. Library Publisher “I'm out"
photo: nickwebb

47. Library Publisher “I'm out"

48. Library Publisher “I'm out"
Click here and provide an alternative

49. Library Publisher “I'm out"

50. Pick the
correct
version
Library Publisher Pick a Version

51. *the asterisk
Library Publisher Pick a Version

52. *the asterisk○Library Publisher Pick a Version

53. ~the tilde
Library Publisher Pick a Version

54. ~1.2
>=1.2.0, <2.0.0
Library Publisher Pick a Version

55. ~1.2
>=1.2.0, <2.0.0
Library Publisher Pick a Version
)

56. ~1.2.3
>=1.2.3, <1.3
Library Publisher Pick a Version

57. ~1.2.3
>=1.2.3, <1.3
Library Publisher Pick a Version
)

58. "require": {
"zendframework/zend-stdlib": “2.1.*”,
"zendframework/zend-servicemanager": "2.1.*",
},
“require-dev": {
“phpunit/phpunit": “~3.7”
}
Library Publisher Pick a Version
"require": {
"zendframework/zend-stdlib": “~2.3”,
"zendframework/zend-servicemanager": “~2.3",
},
“require-dev": {
“phpunit/phpunit": “~4”
}
3rd party library
Your application

59. "require": {
"zendframework/zend-stdlib": “2.1.*”,
"zendframework/zend-servicemanager": "2.1.*",
},
“require-dev": {
“phpunit/phpunit": “~3.7”
}
Library Publisher Pick a Version
"require": {
"zendframework/zend-stdlib": “~2.3”,
"zendframework/zend-servicemanager": “~2.3",
},
“require-dev": {
“phpunit/phpunit": “~4”
}
3rd party library
Your application
*

60. "require": {
"zendframework/zend-stdlib": “2.1.*”,
"zendframework/zend-servicemanager": "2.1.*",
},
“require-dev": {
“phpunit/phpunit": “~3.7”
}
Library Publisher Pick a Version
"require": {
"zendframework/zend-stdlib": “~2.3”,
"zendframework/zend-servicemanager": “~2.3",
},
“require-dev": {
“phpunit/phpunit": “~4”
}
3rd party library
Your application
*

61. "require": {
"zendframework/zend-stdlib": “2.1.*”,
"zendframework/zend-servicemanager": "2.1.*",
},
“require-dev": {
“phpunit/phpunit": “~3.7”
}
Library Publisher Pick a Version
"require": {
"zendframework/zend-stdlib": “~2.3”,
"zendframework/zend-servicemanager": “~2.3",
},
“require-dev": {
“phpunit/phpunit": “~4”
}
3rd party library
Your application
*
~2.1

62. Yo @rdohms, I’m
really happy for you and
I’m gonna let you finish, but
the tilde operator is
totally old news.

63. ^the caret
Library Publisher Pick a Version

64. 1.2.3
>=1.2.3, <2.0.0
Library Publisher Pick a Version
^

65. 1.2.3
>=1.2.3, <2.0.0
Library Publisher Pick a Version
)
^
)

66. 0.3.0
>=0.3.0, <0.4.0
Library Publisher Pick a Version
^

67. 0.3.0
>=0.3.0, <0.4.0
Library Publisher Pick a Version
^
)

68. 0.3.0
>=0.3.0, <0.4.0
Library Publisher Pick a Version
^
)
Major Version Zero

69. Library Consumers
Composer for

70. Library Consumer Install or update?
install or update?

71. Library Consumer Install or update?
Make sure you have
installed the last
updates from other
developers.
?
install updateor

72. Library Consumer Install or update?
Make sure you have
installed the last
updates from other
developers.
?
install updateor

73. Library Consumer Install or update?
Deploying a new
release of your
application to
production.
?
install updateor

74. Library Consumer Install or update?
Deploying a new
release of your
application to
production.
?
install updateor

75. Library Consumer Install or update?
Checked out a new
project and want to
start coding.
?
install updateor

76. Library Consumer Install or update?
Checked out a new
project and want to
start coding.
?
install updateor

77. Library Consumer Install or update?
Grab new versions for
the dependencies of
your project.
?
install updateor

78. Library Consumer Install or update?
Grab new versions for
the dependencies of
your project.
?
install updateor

79. Your application
$
Public
Repository
#
Library Consumer Install or update?
composer.lock!
composer install
composer update

80. Your application
$
Public
Repository
#
Library Consumer Install or update?
composer.lock!
read
composer install
composer update

81. Your application
$
Public
Repository
#
Library Consumer Install or update?
composer.lock!
read grab version
composer install
composer update

82. Your application
$
Public
Repository
#
Library Consumer Install or update?
composer.lock!
read grab version
check latest compatible release
composer install
composer update

83. Your application
$
Public
Repository
#
Library Consumer Install or update?
composer.lock!
read grab version
check latest compatible release
update
composer install
composer update

84. Library Consumer Install or update?
commit your lock file

85. Pick the
correct
version
Library Consumer Version Selection

86. Library Consumer Version Selection
dev-master

87. Library Consumer Version Selection

88. Library Consumer Version Selection

89. Library Consumer Using forks
found a bug?

90. Library Consumer Using forks
$ composer install --prefer-source
Tip

91. Library Consumer Using forks

92. Library Consumer Using forks
patch it,

93. Library Consumer Using forks
patch it,
fork it,

94. Library Consumer Using forks
patch it,
fork it,
push it…

95. Library Consumer Using forks
patch it,
fork it,
push it…
wait for it.

96. Library Consumer Using forks
patch it,
fork it,
push it…
wait for it.

97. Library Consumer Using forks
symfony/symfony

98. Library Consumer Using forks
symfony/symfony
rdohms/symfony

99. Library Consumer Using forks
symfony/symfony
rdohms/symfony
"repositories": [
{
"type": "vcs",
"url": "https://github.com/rdohms/symfony"
}
]

100. Library Consumer Using forks
symfony/symfony
rdohms/symfony
"repositories": [
{
"type": "vcs",
"url": "https://github.com/rdohms/symfony"
}
]
+

101. Library Consumer Using forks
Do not put
forked repositories
on packagist
,

102. Library Consumer Using forks
"require": {
"symfony/symfony": "dev-my-patch as 2.5.0"
}
Tip

103. Library Consumer Composer and deployments
Composer
and
production

104. Library Consumer Composer and deployments
$ composer install --prefer-dist --no-dev --optimize-autoloader
,

105. Library Consumer Composer and deployments
$ composer install --prefer-dist --no-dev --optimize-autoloader
,

106. Library Consumer Composer and deployments
$ composer install --prefer-dist --no-dev --optimize-autoloader
,
- Install same versions
- Uses information defined in the composer.lock file

107. $ composer install --prefer-dist --no-dev --optimize-autoloader
Library Consumer Composer and deployments
,

108. $ composer install --prefer-dist --no-dev --optimize-autoloader
Library Consumer Composer and deployments
,
- Downloads distribution packages
- Can use local cache for previously downloaded
- No git required

109. $ composer install --prefer-dist --no-dev --optimize-autoloader
Library Consumer Composer and deployments
,

110. $ composer install --prefer-dist --no-dev --optimize-autoloader
Library Consumer Composer and deployments
,
- Avoids download unnecessary developer libraries

111. $ composer install --prefer-dist --no-dev --optimize-autoloader
Library Consumer Composer and deployments
,

112. $ composer install --prefer-dist --no-dev --optimize-autoloader
Library Consumer Composer and deployments
,
- Generates classmap from PSR-0/4 autoloaders
- Speeds up autoloading

113. Library Consumer Licensing
$ composer licenses
Name: __root__
Version: 1.0.0
Licenses: none
Dependencies:
doctrine/annotations v1.2.1 MIT
doctrine/cache v1.3.1 MIT
doctrine/collections v1.2 MIT
doctrine/common v2.4.2 MIT
doctrine/inflector v1.0 MIT
doctrine/lexer v1.0 MIT
psr/log 1.0.0 MIT
symfony/symfony v2.5.6 MIT
twig/twig v1.16.2 BSD-3-Clause
Tip

114. Library Consumer Simulating Environments
Tip
Production
Server
.
Development
Server
.

115. Library Consumer Simulating Environments
Tip
Production
Server
.
Development
Server
.PHP
7.0
PHP
5.6

116. Library Consumer Simulating Environments
"config": {
"platform": {
"php": “5.6.2”,
“ext-mongodb”: “1.1”
}
},
Tip
Production
Server
.
Development
Server
.PHP
7.0
PHP
5.6

117. Library Consumer Simulating Environments
$ composer install —-ignore-platform-reqs
Tip

118. Library Consumer Private Packages and Proxy
Satis and Toran

119. composer Packagist
"
Your application
$
Public
Repository
#
Library Consumer Private Packages and Proxy

120. composer
Packagist
"
Your application
$
Public
Repository
#
Satis / Toran
"
Private
Repository
/
proxy
Library Consumer Private Packages and Proxy

121. Library Consumer Private Packages and Proxy
toranproxy.com
private repos, automatic packagist proxy
and support composer development

122. Library Consumer Tooling
$ composer require jquery/jquery
How many of you?

123. Library Consumer Tooling

124. Library Consumer Tooling

125. Javascript only Developer
Library Consumer Tooling
0 my-js-library
1

126. Javascript only Developer
Library Consumer Tooling
0 my-js-library
! package.json
1

127. Javascript only Developer
Library Consumer Tooling
0 my-js-library
! package.json
! bower.json
1

128. Javascript only Developer
Library Consumer Tooling
0 my-js-library
! composer.json
! package.json
! bower.json
1

129. Javascript only Developer
Library Consumer Tooling
0 my-js-library
! composer.json
! package.json
! bower.json
! .gemspec
1

130. Javascript only Developer
Library Consumer Tooling
0 my-js-library
! composer.json
! package.json
! bower.json
! .gemspec
1
2
2

131. Library Consumer Tooling

132. Library Consumer Tooling
Right tool.
Right job.

133. Library Consumer One last thing
One last thing…

134. Library Consumer pickle!

135. Library Consumer pickle!
$ pickle install memcache
https://wiki.php.net/rfc/pickle
https://github.com/FriendsOfPHP/pickle

136. Thank you.
https://joind.in/talk/6f5e4
https://leanpub.com/
composer-cookbook

137. Thank you.any questions?
3 http://slides.doh.ms
4 http://doh.ms
5 @rdohms
https://joind.in/talk/6f5e4
https://leanpub.com/
composer-cookbook