diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/testscript.cli | 102 |
1 files changed, 91 insertions, 11 deletions
diff --git a/doc/testscript.cli b/doc/testscript.cli index 9423ca3..4fe6d72 100644 --- a/doc/testscript.cli +++ b/doc/testscript.cli @@ -462,7 +462,6 @@ the above as a single test with some branching and without using the \ : config-empty : -@@ Why no +? if ($cxx.target.class != windows) conf = /dev/null else @@ -853,7 +852,7 @@ buildfile as described in \l{#integration Build System Integration}. A scope also establishes a cleanup context. All cleanups (\l{syntax-cleanup Cleanup}) registered in a scope are performed at the end of that scope's -execution. +execution in the reverse order of their registration. Prior to executing a scope, a nested temporary directory is created with the scope id as its name. This directory then becomes the scope's working @@ -1322,7 +1321,7 @@ and ones that start on the same line describes the syntax inside the line. If a rule contains multiple lines, then each line matches a separate line in the input. -If a multiplier appears in from of a line then it specifies the number of +If a multiplier appears in front of a line then it specifies the number of repetitions of the entire line. For example, from the following three rules, the first describes a single line of multiple literals, the second \- multiple lines of a single literal, and the third \- multiple lines of multiple @@ -1427,7 +1426,7 @@ variable-like: variable-line|variable-if variable-line: - <variable-name> ('='|'+='|'=+') value-attributes? <value> + <variable-name> ('='|'+='|'=+') value-attributes? <value> ';'? value-attributes: '[' <key-value-pairs> ']' @@ -1646,7 +1645,7 @@ variable-like: variable-line|variable-if variable-line: - <variable-name> ('='|'+='|'=+') value-attributes? <value> + <variable-name> ('='|'+='|'=+') value-attributes? <value> ';'? value-attributes: '[' <key-value-pairs> ']' \ @@ -1659,6 +1658,9 @@ args = [strings] foo bar 'fox baz' echo $args # foo bar fox baz \ +The value can only be followed by \c{;} inside a test to signal the test +continuation. + \h#syntax-variable-if|Variable-If| \ @@ -1965,9 +1967,11 @@ continuations. \h#syntax-regex|Output Regex| -The expected result in output here-strings and here-documents can be specified -as a regular expression instead of literal text. To signal the use of regular -expressions the redirect must end with the \c{~} modifier, for example: +Instead of literal text the expected result in output here-strings and +here-documents can be specified as ECMAScript regular expressions (more +specifically, ECMA-262-based C++11 regular expressions). To signal the use of +regular expressions the redirect must end with the \c{~} modifier, for +example: \ $* >~'/fo+/' 2>>~/EOE/ @@ -2186,8 +2190,10 @@ Compare the contents of \i{file1} and \i{file2}. The \c{diff} utility is not a builtin. Instead, the test platform is expected to provide a (reasonably) POSIX-compatible implementation. It should at least -supports the \c{-u} and \c{-U} options. On Windows GNU \c{diff} can be -assumed (provided as part of the \c{build2} toolchain). +supports the \c{-u} (unified output format) and \c{-U} (unified output format +with \i{num} lines of context) options and recognize the \c{-} file name as +an instruction to read from \c{stdin}. On Windows, GNU \c{diff} can be assumed +(provided as part of the \c{build2} toolchain). \h#builtins-echo|\c{echo}| @@ -2276,6 +2282,80 @@ working directory unless the \c{-f} option is specified. is outside the script working directory.|| +\h#builtins-sed|\c{sed}| + +\ +sed [-n] -e <script> [<file>] +\ + +Read text from \i{file}, make editing changes according to \i{script}, and +write the result to \c{stdout}. If \i{file} is not specified or is \c{-}, read +from \c{stdin}. + +Note that this builtin implementation deviates significantly from POSIX +\c{sed} (as described next). Most significantly, the regular expression flavor +is ECMAScript (more specifically, ECMA-262-based C++11 regular expressions). + +\dl| + +\li|\n\c{-n} + + Suppress automatic printing of the pattern space at the end of the script.| + +\li|\n\c{-e <script>}\n + + Editing commands to be executed (required).|| + +To perform the transformation \c{sed} reads each line of input (without the +newline) into the pattern space. It then executes the script commands on +the pattern space. At the end of the script, unless the \c{-n} option is +specified, \c{sed} writes the pattern space to \c{stdout} followed by a +newline. + +Currently, only single-command scripts using the following editing commands +are supported. + +\dl| + +\li|\n\c{s/<regex>/<replacement>/<flags>}\n + + Match \i{regex} against the pattern space. If successful, replace the part + of the pattern space that matched with \i{replacement}. If the \c{g} flag is + present in \i{flags} then continue substituting subsequent matches of + \i{regex} in the same pattern space. If the \c{p} flag is present in + \i{flags} and the replacement has been made, then write the pattern space to + \c{stdout}. If both \c{g} and \c{p} were specified, then write the pattern + space out only after the last substitution. + + Any character other than \c{\\} (backslash) or newline can be used instead + of \c{/} (slash) to delimit \i{regex}, \i{replacement}, and \i{flags}. Note + that no escaping of the delimiter character is supported. + + If \i{regex} starts with \c{^}, then it only matches at the beginning of the + pattern space. Similarly, if it ends with \c{$}, then it only matches at the + end of the pattern space. If the \c{i} flag is present in \i{flags}, then + the match is performed in a case-insensitive manner. + + In \i{replacement}, besides the standard ECMAScript escape sequences + (\c{$1}, \c{$2}, \c{$&}, etc), the following additional sequences are + recognized: + + \ + \N - Nth capture, where N is in the 1-9 range. + + \u - Convert next character to the upper case. + \l - Convert next character to the lower case. + + \U - Convert next characters until \E to the upper case. + \L - Convert next characters until \E to the lower case. + + \\ - Literal backslash. + \ + + Note that unlike POSIX semantics, just \c{&} does not have a special meaning + in \i{replacement}.|| + + \h#builtins-test|\c{test}| \ @@ -2295,7 +2375,7 @@ Test the specified \i{path} according to one of the following options. Succeed Path exists and is to a directory.|| -Note that all tests dereference symbolic links. +Note that tests dereference symbolic links. \h#builtins-touch|\c{touch}| |