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Hi there, |
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I worked through the current PMS and tried to formalize the grammar for |
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DEPEND a little better. Maybe someone could have a look at it and check |
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it for correctness. It could even become part of the gentoo |
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development docs or be an appendix to the PMS. The other grammars |
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(SRC_URI etc.) should be fairly easy. |
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|
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Any comments? |
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|
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Have Fun, |
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|
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Björn |
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= EAPI 0/1 package dependency specification in Backus-Naur-Form = |
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The terminals are described as regular expressions. |
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The nonterminal <dependencies> is what is allowed in the DEPENDs. |
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terminals: |
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<category name> ::= "[A-Za-z0-9+_][A-Za-z0-9+_.-]*" |
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<close parenthesis> ::= "[)]" |
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<colon> ::= ":" (not in EAPI0) |
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<dependency group or operator> ::= "[|][|]" |
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<empty> ::= "" |
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<equal> ::= "=" |
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<exclamation mark> ::= "!" |
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<general package operator> ::= "<|<=|~|>|>=" |
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<open parenthesis> ::= "[(]" |
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<package name> ::= "[A-Za-z0-9+_-]*([A-Za-z+_-]|[A-Za-z+_][0-9]+)" |
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<package version alpha part> ::= "[a-z]" |
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<package version number part> ::= "[0-9]+([.][0-9]+)*" |
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<package version suffix> ::= "_(alpha|beta|pre|rc|p)[0-9]*" |
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<question mark> ::= "?" |
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<slash> ::= "/" |
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<slot name> ::= "[A-Za-z0-9+_][A-Za-z0-9+_.-]*" (not in EAPI0) |
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<space> ::= " " |
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<star> ::= "*" |
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<useflag name> ::= "[A-Za-z0-9][A-Za-z0-9+_@-]*" |
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|
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non-terminals: |
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<all-of group> ::= <open parenthesis><space><group contents><space><close parenthesis> |
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<any-of group> ::= <dependency group or operator><space><all-of group> |
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<blocked package dependency> ::= <exclamation mark><package dependency> |
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<dependencies> ::= <empty>|<group contents> |
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<dependency item> ::= <blocked package dependency>|<package dependency>|<all-of group>|<any-of group>|<use conditional group> |
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<group contents> ::= <dependency item>|<group contents><space><dependency item> |
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<limited package dependency> ::= <dependency operator><package with version> |
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<limited package dependency likeness> ::= <equal><package with version>|<equal><package with version><star> |
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<package dependency> ::= <unslotted package dependency>|<slotted package dependency> |
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<package version> ::= <package version number part><package version alpha part><package version suffix part> |
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<package version suffix part> ::= <empty>|<package version suffix part><package version suffix> |
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<package with version> ::= <qualified package name>-<package version> |
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<qualified package name> ::= <category name><slash><package name> |
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<slotted package dependency> ::= <unslotted package dependency><colon><slot name> (not in EAPI0) |
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<unslotted package dependency> ::= <qualified package name>|<limited package dependency>|<limited package dependency likeness> |
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<use conditional group> ::= <use conditional><space><any-of group> |
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<use condition> ::= <useflag name>|<exclamation mark><useflag name> |
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