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10 changed files with 52 additions and 52 deletions
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@ -1971,7 +1971,7 @@ void complete( const wchar_t *cmd,
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error_max=0;
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/**
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If we are completing a variable name or a tilde expantion user
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If we are completing a variable name or a tilde expansion user
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name, we do that and return. No need for any other competions.
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*/
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@ -16,7 +16,7 @@ the user does not have to worry about an array containing elements
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such as dashes. \c fish performs a special check when invoking the
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count program, and if the user uses a help option, this help page is
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displayed, but if a help option is contained inside of a variable or
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is the result of expantion, it will be passed on to the count program.
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is the result of expansion, it will be passed on to the count program.
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\subsection count-example Example
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@ -68,7 +68,7 @@ and <a href="#escapes">character escapes</a> get in the way. When that
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happens, the user can write a parameter within quotes, either '
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(single quote) or " (double quote). There is one important difference
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between single quoted and double quoted strings: When using double
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quoted string, <a href='#expand-variable'>variable expantion</a> still
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quoted string, <a href='#expand-variable'>variable expansion</a> still
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takes place. Other than that, a quoted parameter will not be
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parameter expanded, may contain spaces, and escape sequences are
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ignored. Single quotes have no special meaning withing double quotes
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@ -283,8 +283,8 @@ the \c -a switch. If \c myprog accepts the arguments start and stop,
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this can be specified as <tt>complete -c myprog -a 'start
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stop'</tt>. The argument to the \c -a switch is always a single
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string. At completion time, it will be tokenized on spaces and tabs,
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and variable expantion, command substitution and other forms of
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parameter expantion will take place.
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and variable expansion, command substitution and other forms of
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parameter expansion will take place.
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Fish has a special syntax to support specifying switches accepted by a
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command. The switches \c -s, \c -l and \c -o are used to specify a
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@ -319,7 +319,7 @@ href='mailto: fish-users@lists.sf.net'>the fish mailinglist</a>.
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\section expand Parameter expansion (Globbing)
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When an argument for a program is given on the commandline, it
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undergoes the process of parameter expantion before it is sent on to
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undergoes the process of parameter expansion before it is sent on to
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the command. There are many ways in which the user can specify a
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parameter to be expanded. These include:
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@ -344,7 +344,7 @@ warning will also be printed.
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\subsection expand-command-substitution Command substitution
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If a parameter contains a set of parenthesis, the text enclosed by the
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parentesis will be interpreted as a list of commands. Om expantion,
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parentesis will be interpreted as a list of commands. Om expansion,
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this list is executed, and substituted by the output. If the output is
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more than one line long, each line will be expanded to a new
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parameter.
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@ -393,27 +393,27 @@ shells allow you to specify a variable name using '$VARNAME' or
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'${VARNAME}'. Fish only supports the former, but has no support
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whatsoever for the latter or anything remotely like it. So what is
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'{$VARNAME}' then? Well, '{WHATEVER}' is <a href='#brace'>brace
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expantion</a>, the same as supported by Posix shells, i.e. 'a{b,c}d'
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expansion</a>, the same as supported by Posix shells, i.e. 'a{b,c}d'
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-> 'abd acd' works both in bash and on fish. So '{$VARNAME}' is a
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bracket-expantion with only a single element, i.e. it becomes
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bracket-expansion with only a single element, i.e. it becomes
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expanded to '$VARNAME', which will be variable expanded to the value
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of the variable 'VARNAME'. So you might think that the brackets don't
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actually do anything, and that is nearly the truth. The snag is that
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there once along the way was a '}' in there somewhere, and } is not a
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valid character in a variable name. So anything after the otherwise
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pointless bracket expantion becomes NOT a part of the variable name,
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pointless bracket expansion becomes NOT a part of the variable name,
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even if it happens to be a legal variable name character. That's why
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'{$USER}san' works. A case of one syntax just lending itself so nicely
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to solving an unrelated problem in it's spare time.
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Variable expantion is the only type of expantion performed on double
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Variable expansion is the only type of expansion performed on double
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quoted strings. There is, however, an important difference in how
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variables are expanded when quoted and when unquoted. An unquoted
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variable expantion will result in a variable number of arguments. For
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variable expansion will result in a variable number of arguments. For
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example, if the variable $foo has zero elements or is undefined, the
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argument $foo will expand to zero elements. If the variable $foo is an
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array of five elements, the argument $foo will expand to five
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elements. When quoted, like "$foo", a variable expantion will always
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elements. When quoted, like "$foo", a variable expansion will always
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result in exactly one argument. Undefined variables will expand to the
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empty string, and array variables will be concatenated using the space
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character.
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@ -429,7 +429,7 @@ directory of the process owner.
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\subsection expand-process Process expansion
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The \% (percent) character at the beginning of a parameter followed by
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a string is expanded into a process id. The following expantions are
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a string is expanded into a process id. The following expansions are
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performed:
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- If the string is the entire word \c self, the shells pid is the result
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@ -471,7 +471,7 @@ The concept of environment variables are central to any
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shell. Environment variables are variables, whose values can be set
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and used by the user. For information on how to use the current value
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of a variable, see the section on <a href='#expand-variable'>variable
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expantion</a>.
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expansion</a>.
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To set a variable value, use the <a href="builtins.html#set"> \c set
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command</a>.
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@ -1159,7 +1159,7 @@ language will often be rather low-level.
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Examples:
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- There should only be one type of input to the shell, lists of commands. Loops, conditionals and variable assignments are all performed through regular commands.
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- The differences between builtin commands, shellscript functions and builtin commands should be made as small as possible. Builtins and shellscript functions should have exactly the same types of argument expantion as other commands, should be possible to use in any position in a pipeline, and should support any io redirection.
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- The differences between builtin commands, shellscript functions and builtin commands should be made as small as possible. Builtins and shellscript functions should have exactly the same types of argument expansion as other commands, should be possible to use in any position in a pipeline, and should support any io redirection.
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- Instead of forking when performing command substitution to provide a fake variable scope, all fish commands are performed from the same process, and fish instead supports true scoping
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- All blocks end with the \c end builtin
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14
expand.c
14
expand.c
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@ -68,7 +68,7 @@ parameter expansion.
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#define COMPLETE_LAST_DESC COMPLETE_SEP_STR L"Last background job"
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#define COMPLETE_VAR_DESC L"Variable name is zero characters long."
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#define COMPLETE_VAR2_DESC L" Did you mean {$VARIABLE}? For information on how variable expantion in fish differs from Posix variable expantion, see the manual section on variable expantion by typing 'help expand-variable'."
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#define COMPLETE_VAR2_DESC L" Did you mean {$VARIABLE}? For information on how variable expansion in fish differs from Posix variable expansion, see the manual section on variable expansion by typing 'help expand-variable'."
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/**
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String in process expansion denoting ourself
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@ -95,8 +95,8 @@ parameter expansion.
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any tokens which need to be expanded or otherwise altered. Clean
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strings can be passed through expand_string and expand_one without
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changing them. About 90% of all strings are clean, so skipping
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expantion on them actually does save a small amount of time, since
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it avoids multiple memory allocations during the expantion process.
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expansion on them actually does save a small amount of time, since
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it avoids multiple memory allocations during the expansion process.
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*/
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static int is_clean( const wchar_t *in )
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{
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if( c == VARIABLE_EXPAND )
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{
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/*
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Regular expantion, i.e. expand this argument to nothing
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Regular expansion, i.e. expand this argument to nothing
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*/
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empty = 1;
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}
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else
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{
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/*
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Expantion to single argument.
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Expansion to single argument.
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*/
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string_buffer_t res;
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sb_init( &res );
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/**
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The real expantion function. expand_one is just a wrapper around this one.
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The real expansion function. expand_one is just a wrapper around this one.
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*/
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int expand_string( wchar_t *str,
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array_list_t *end_out,
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if( *next == PROCESS_EXPAND )
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{
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/*
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If process expantion matches, we are not
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If process expansion matches, we are not
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interested in other completions, so we
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short-circut and return
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*/
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30
expand.h
30
expand.h
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@ -1,7 +1,7 @@
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/**\file expand.h
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Prototypes for string expantion functions. These functions perform
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several kinds of parameter expantion. There are a lot of issues
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Prototypes for string expansion functions. These functions perform
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several kinds of parameter expansion. There are a lot of issues
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with regards to memory allocation. Overall, these functions would
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benefit from using a more clever memory allocation scheme, perhaps
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an evil combination of talloc, string buffers and reference
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#include "util.h"
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/**
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Flag specifying that subshell expantion should be skipped
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Flag specifying that subshell expansion should be skipped
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*/
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#define EXPAND_SKIP_SUBSHELL 1
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/**
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Flag specifying that variable expantion should be skipped
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Flag specifying that variable expansion should be skipped
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*/
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#define EXPAND_SKIP_VARIABLES 2
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/**
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Flag specifying that wildcard expantion should be skipped
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Flag specifying that wildcard expansion should be skipped
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*/
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#define EXPAND_SKIP_WILDCARDS 4
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/** Character represeting a home directory */
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HOME_DIRECTORY = EXPAND_RESERVED,
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/** Character represeting process expantion */
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/** Character represeting process expansion */
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PROCESS_EXPAND,
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/** Character representing variable expantion */
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/** Character representing variable expansion */
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VARIABLE_EXPAND,
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/** Character rpresenting variable expantion into a single element*/
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/** Character rpresenting variable expansion into a single element*/
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VARIABLE_EXPAND_SINGLE,
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/** Character representing the start of a bracket expantion */
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/** Character representing the start of a bracket expansion */
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BRACKET_BEGIN,
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/** Character representing the end of a bracket expantion */
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/** Character representing the end of a bracket expansion */
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BRACKET_END,
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/** Character representing separation between two bracket elements */
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Perform various forms of expansion on in, such as tilde expansion
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(~USER becomes the users home directory), variable expansion
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($VAR_NAME becomes the value of the environment variable VAR_NAME),
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subshell expantion and wildcard expansion. The results are inserted
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subshell expansion and wildcard expansion. The results are inserted
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into the list out.
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If the parameter does not need expansion, it is copied into the list
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newly allocated strings are inserted into the list out.
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\param in The parameter to expand
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\param flag Specifies if any expantion pass should be skipped. Legal values are any combination of EXPAND_SKIP_SUBSHELL EXPAND_SKIP_VARIABLES and EXPAND_SKIP_WILDCARDS
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\param flag Specifies if any expansion pass should be skipped. Legal values are any combination of EXPAND_SKIP_SUBSHELL EXPAND_SKIP_VARIABLES and EXPAND_SKIP_WILDCARDS
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\param out The list to which the result will be appended.
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\return One of EXPAND_OK, EXPAND_ERROR, EXPAND_WILDCARD_MATCH and EXPAND_WILDCARD_NO_MATCH
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*/
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names.
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\param in The parameter to expand
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\param flag Specifies if any expantion pass should be skipped. Legal values are any combination of EXPAND_SKIP_SUBSHELL EXPAND_SKIP_VARIABLES and EXPAND_SKIP_WILDCARDS
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\param flag Specifies if any expansion pass should be skipped. Legal values are any combination of EXPAND_SKIP_SUBSHELL EXPAND_SKIP_VARIABLES and EXPAND_SKIP_WILDCARDS
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\return The expanded parameter, or 0 on failiure
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*/
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wchar_t *expand_one( wchar_t *in, int flag );
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/**
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Perform tilde expantion and nothing else on the specified string.
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Perform tilde expansion and nothing else on the specified string.
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If tilde expantion is needed, the original string is freed and a
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If tilde expansion is needed, the original string is freed and a
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new string, allocated using malloc, is returned.
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*/
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wchar_t *expand_tilde(wchar_t *in);
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10
fish_tests.c
10
fish_tests.c
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@ -518,7 +518,7 @@ static void test_parser()
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}
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/**
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Perform parameter expantion and test if the output equals the zero-terminated parameter list supplied.
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Perform parameter expansion and test if the output equals the zero-terminated parameter list supplied.
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\param in the string to expand
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\param flags the flags to send to expand_string
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}
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/**
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Test globbing and other parameter expantion
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Test globbing and other parameter expansion
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*/
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static void test_expand()
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{
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say( L"Testing parameter expantion" );
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say( L"Testing parameter expansion" );
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if( !expand_test( L"foo", 0, L"foo", 0 ))
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{
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if( !expand_test( L"a{b,c,d}e", 0, L"abe", L"ace", L"ade", 0 ) )
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{
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err( L"Bracket expantion is broken" );
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err( L"Bracket expansion is broken" );
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}
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if( !expand_test( L"a*", EXPAND_SKIP_WILDCARDS, L"a*", 0 ) )
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{
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err( L"Cannot skip wildcard expantion" );
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err( L"Cannot skip wildcard expansion" );
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}
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}
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@ -22,7 +22,6 @@ complete -c help -x -a prompt -d "Help on how to set the prompt"
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complete -c help -x -a title -d "Help on how to set the titlebar message"
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complete -c help -x -a killring -d "Help on how to copy and paste"
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complete -c help -x -a editor -d "Help on editor shortcuts"
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complete -c help -x -a globbing -d "Help on parameter expantion (Globbing)"
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complete -c help -x -a variables -d "Help on environment variables"
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complete -c help -x -a color -d "Help on setting syntax highlighting colors"
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complete -c help -x -a prompt -d "Help on changing the prompt"
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@ -30,10 +29,11 @@ complete -c help -x -a title -d "Help on changing the titlebar messages"
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complete -c help -x -a builtin-overview -d "A short summary of all builtin commands"
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complete -c help -x -a changes -d "The changelog"
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complete -c help -x -a expand -d "Help on parameter expantion (Globbing)"
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complete -c help -x -a globbing -d "Help on parameter expansion (Globbing)"
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complete -c help -x -a expand -d "Help on parameter expansion (Globbing)"
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complete -c help -x -a expand-variable -d "Help on variable exapantion \$VARNAME"
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complete -c help -x -a expand-home -d "Help on home directory expantion ~USER"
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complete -c help -x -a expand-brace -d "Help on brace expantion {a,b,c}"
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complete -c help -x -a expand-wildcard -d "Help on wildcard expantion *.*"
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complete -c help -x -a expand-home -d "Help on home directory expansion ~USER"
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complete -c help -x -a expand-brace -d "Help on brace expansion {a,b,c}"
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complete -c help -x -a expand-wildcard -d "Help on wildcard expansion *.*"
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complete -c help -x -a expand-command-substitution -d "Help on command substututions (SUBCOMMAND)"
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complete -c help -x -a expand-process -d "Help on process expantion %JOB"
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complete -c help -x -a expand-process -d "Help on process expansion %JOB"
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@ -1005,3 +1005,4 @@ function delete-or-exit --key-binding
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exit
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end
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end
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@ -307,7 +307,7 @@ void get_desc( wchar_t *fn, string_buffer_t *sb, int is_cmd )
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/*
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Test if the file specified by the given filename matches the
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expantion flags specified. flags can be a combination of
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expansion flags specified. flags can be a combination of
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EXECUTABLES_ONLY and DIRECTORIES_ONLY.
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*/
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static int test_flags( wchar_t *filename,
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@ -1,8 +1,7 @@
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/** \file wildcard.h
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My own globbing implementation. Needed to implement this instead
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of using libs globbing to support tab-expantion of globbed
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of using libs globbing to support tab-expansion of globbed
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paramaters.
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*/
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