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Pervasives defines the objects that are defined in all
programs. The following objects are defined.
Parent objects: none.
The Object object is the root object.
Every class is a subclass of Object.
It provides the following fields:
$(o.object-length): the number of fields and methods in the object.
$(o.object-mem <var>): returns true iff the <var> is a field
or method of the object.
$(o.object-add <var>, <value>): adds the field to the object,
returning a new object.
$(o.object-find <var>): fetches the field or method from the object;
it is equivalent to $(o.<var>), but the variable can be non-constant.
$(o.object-map <fun>): maps a function over the object. The function
should take two arguments; the first is a field name, the second is the
value of that field. The result is a new object constructed from the
values returned by the function.
o.object-foreach: the object-foreach form is equivalent to object-map,
but with altered syntax. o.object-foreach(<var1>, <var2>) =>
<body>
For example, the following function prints all the fields of an
object o.
PrintObject(o) =
o.object-foreach(v, x) =>
println($(v) = $(x))
The export form is valid in a object-foreach body. The following
function collects just the field names of an object.
FieldNames(o) =
names[] =
o.object-foreach(v, x) =>
names[] += $(v)
export
return $(names)
Parent objects: Object.
A Map object is a dictionary from values to values. The <key>
values are restricted to simple values: integers, floating-point numbers,
strings, files, directories, and arrays of simple values.
The Map object provides the following methods.
$(o.length): the number of items in the map.
$(o.mem <key>): returns true iff the <key> is defined
in the map.
$(o.add <key>, <value>): adds the field to the map,
returning a new map.
$(o.find <key>): fetches the field from the map.
$(o.keys): fetches an array of all the keys in the map, in alphabetical order.
$(o.values): fetches an array of all the values in the map,
in the alphabetical order of the corresponding keys.
$(o.map <fun>): maps a function over the map. The function
should take two arguments; the first is a field name, the second is the
value of that field. The result is a new object constructed from the
values returned by the function.
o.foreach: the foreach form is equivalent to map,
but with altered syntax. o.foreach(<var1>, <var2>) =>
<body>
For example, the following function prints all the fields of a
map o.
PrintMap(o) =
o.foreach(v, x) =>
println($(v) = $(x))
The export form is valid in a foreach body. The following
function reimplements the key method.
FieldNames(o) =
names =
o.foreach(v, x) =>
names += $(v)
export
return $(names)
There is also simpler syntax when the key is a string. The table can be
defined using definitions with the form $|key|
(the number of pipe symbols | is allowed to vary).
$|key 1| = value1
$||key1|key2|| = value2 # The key is key1|key2
X = $|key 1| # Define X to be the value of field $|key 1|
The usual modifiers are also allowed. The expression $`|key| represents
lazy evaluation of the key, and $,|key| is normal evaluation.
Parent objects: Object.
The Number object is the parent object for integers
and floating-point numbers.
Parent objects: Number.
The Int object represents integer values.
Parent objects: Number.
The Float object represents floating-point numbers.
Parent objects: Object.
The Sequence object represents a generic object containing
sequential elements. It provides the following methods.
$(s.length): the number of elements in the sequence.
$(s.is-nonempty): true iff the expression $(s.nth 0)
will complete without failure.
$(s.nth <i>): return the n’th element of the sequence.
$(s.nth-tl <i>): return the n’th tail of the sequence.
$(s.map <fun>): maps a function over the fields in the sequence.
The function should take one argument. The result is a new sequence
constructed from the values returned by the function.
s.foreach: the foreach form is equivalent to map,
but with altered syntax. s.foreach(<var>) =>
<body>
For example, the following function prints all the elements of the sequence.
PrintSequence(s) =
s.foreach(x) =>
println(Elem = $(x))
The export form is valid in a foreach body. The following
function counts the number of zeros in the sequence.
Zeros(s) =
count = $(int 0)
s.foreach(v) =>
if $(equal $(v), 0)
count = $(add $(count), 1)
export
export
return $(count)
$(s.forall <fun>): tests whether each element of the sequence
satifies a predicate.
$(s.exists <fun>): tests whether the sequence contains an element
that satisfies a predicate.
$(s.sort <fun>): sorts a sequence. The <fun> is a comparison
function. It takes two elements (x, y) of the sequence, compares them, and returns
a negative number if x < y, a positive number if x > y, and zero if the two elements
are equal.osh> items = $(int 0 3 -2) osh> items.forall(x => $(gt $x, 0)) - : bool = false osh> items.exists(x => $(gt $x, 0)) - : bool = true osh> items.sort($(compare)) - : Array = -2 3 0
Parent objects: Sequence.
The Array is a random-access sequence.
It provides the following additional methods.
$(s.nth <i>): returns element i of the sequence.
$(s.rev <i>): returns the reversed sequence.
Parent objects: Array.
Parent objects: Object.
The Fun object provides the following methods.
$(f.arity): the arity if the function.
Parent objects: Object.
The Rule object represents a build rule.
It does not currently have any methods.
Parent object: Object.
The Target object contains information collected for
a specific target file.
target: the target file.
effects: the files that may be modified by a
side-effect when this target is built.
scanner_deps: static dependencies that must be built
before this target can be scanned.
static-deps: statically-defined build dependencies
of this target.
build-deps: all the build dependencies for the target,
including static and scanned dependencies.
build-values: all the value dependencies associated
with the build.
build-commands: the commands to build the target.
output-file: if output was diverted to a file,
with one of the --output-* options A,
this field names that file. Otherwise it is false.
The object supports the following methods.
find(file): returns a Target object for the given file.
Raises a RuntimeException if the specified target is
not part of the project.
find-optional(file): returns a Target object
for the given file, or false if the file is not
part of the project.
NOTE: the information for a target is constructed dynamically,
so it is possible that the Target object for a node will
contain different values in different contexts. The easiest way
to make sure that the Target information is complete is
to compute it within a rule body, where the rule depends on
the target file, or the dependencies of the target file.
Parent objects: Object.
The Node object is the parent object for files and directories.
It supports the following operations.
$(node.stat): returns a stat object for the file. If the
file is a symbolic link, the stat information is for the destination of
the link, not the link itself.$(node.lstat): returns a stat object for the file or symbolic link.
$(node.unlink): removes the file.
$(node.rename <file>): renames the file.
$(node.link <file>): creates a hard link <dst> to this file.
$(node.symlink <file>): create a symbolic link <dst> to this file.
$(node.chmod <perm>): change the permission of this file.
$(node.chown <uid>, <gid>): change the owner and group id of this file.
Parent objects: Node.
The file object represents the name of a file.
Parent objects: Node.
The Dir object represents the name of a directory.
Parent objects: Object.
A Channel is a generic IO channel.
It provides the following methods.
$(o.close): close the channel.
$(o.name): returns the file name associated with the channel.
Parent objects: Channel.
A InChannel is an input channel. The variable stdin is the
standard input channel.
It provides the following methods.
$(InChannel.fopen <file>): open a new input channel.
$(InChannel.of-string <string>): open a new input channel,
using a string as input.
$(o.read <number>): reads the given number of characters from the channel
$(o.readln): reads a line from the channel
Parent object: Channel.
A OutChannel is an output channel. The variables stdout
and stderr are the standard output and error channels.
It provides the following methods.
$(OutChannel.fopen <file>): open a new output channel.
$(OutChannel.string): open a new output channel,
writing to a string.
$(OutChannel.to-string): get the current string of
output, for an output channel created as OutChannel.open-string.
$(OutChannel.append <file>): opens a new output channel,
appending to the file.
$(c.flush): flush the output channel.
$(c.print <string>): print a string to the channel.
$(c.println <string>): print a string to the channel,
followed by a line terminator.
Parent objects: Location.
The Location object represents a location in a file.
Parent objects: Object.
The Exception object is used as the base object for exceptions.
It has no fields.
Parent objects: Exception.
The RuntimeException object represents an exception from the
runtime system. It has the following fields.
position: a string representing the location where the
exception was raised.
message: a string containing the exception message.
Parent objects: Exception.
The UnbuildableException object should be used to signal that a target
is not buildable. It will be caught by functions such as
target-exists.
This exception has the following fields:
target: indicates which target is not buildable.
message: a string containing the exception message.
Parent objects: Object.
The Shell object contains the collection of builtin functions
available as shell commands.
You can define aliases by extending this object with additional methods. All methods in this class are called with one argument: a single array containing an argument list.
echoThe echo function prints its arguments to the standard output channel.
jobsThe jobs method prints the status of currently running commands.
cdThe cd function changes the current directory.
Note that the current directory follows the usual scoping
rules. For example, the following program lists the
files in the foo directory, but the current
directory is not changed.
section
echo Listing files in the foo directory...
cd foo
ls
echo Listing files in the current directory...
ls
bgThe bg method places a job in the background.
The job is resumed if it has been suspended.
fgThe fg method brings a job to the foreground.
The job is resumed if it has been suspended.
stopThe stop method suspends a running job.
waitThe wait function waits for a running job to terminate.
It is not possible to wait for a suspended job.
The job is not brought to the foreground. If the wait
is interrupted, the job continues to run in the background.
killThe kill function signal a job.
kill [signal] <pid...>.
The signals are either numeric, or symbolic. The symbolic signals are named as follows.
ABRT, ALRM, HUP, ILL, KILL, QUIT, SEGV, TERM, USR1, USR2, CHLD, STOP, TSTP, TTIN, TTOU, VTALRM, PROF.
exitThe exit function terminates the current session.
which, whereSee the documentation for the corresponding functions.
rehashReset the search path.
ln-or-cp src dstLinks or copies src to dst, overwriting dst. Namely, ln-or-cp would first
delete the dst file (unless it is a directory), if it exists. Next it would try to create
a symbolic link dst poiting to src (it will make all the necessary adjustmnents of
relative paths). If symbolic link can not be created (e.g. the OS or the filesystem does
not support symbolic links), it will try to create a hard link. If that fails too, it will try
to forcibly copy src to dst.
historyPrint the current command-line history.
digestPrint the digests of the given files.
Win32 doesn’t provide very many programs for scripting, except
for the functions that are builtin to the DOS cmd.exe.
The following functions are defined on Win32 and only on Win32.
On other systems, it is expected that these programs already
exist.
grepgrep [-q] [-n] [-v] [-h] pattern files...
The grep alias calls the omake’s internal grep function.
By default, omake uses internal versions of the following commands:
cp, mv, cat, rm, mkdir, chmod,
test, find.
If you really want to use the standard system versions of these
commands, set the USE_SYSTEM_COMMANDS as one of the first
definitions in your OMakeroot file.
pwdpwd
The pwd alias would print the absolute path to current directory.
mkdirmkdir [-m <mode>] [-p] files
The mkdir function is used to create directories.
The -verb+-m+ option can be used to specify the permission
mode of the created directory. If the -p option
is specified, the full path is created.
cp, mv cp [-f] [-i] [-v] src dst
cp [-f] [-i] [-v] files dst
mv [-f] [-i] [-v] src dst
mv [-f] [-i] [-v] files dst
The cp function copies a src file to
a dst file, overwriting it if it already exists.
If more than one source file is specified, the final file
must be a directory, and the source files are copied
into the directory.
rmrm [-f] [-i] [-v] [-r] files rmdir [-f] [-i] [-v] [-r] dirs
The rm function removes a set of files.
No warnings are issued if the files do not exist, or if
they cannot be removed.
Options:
chmodchmod [-r] [-v] [-f] mode files
The chmod function changes the permissions on a set of
files or directories. This function does nothing on Win32.
The mode may be specified as an octal number,
or in symbolic form [ugoa]*[-=][rwxXstugo]+.
See the man page for chmod for details.
Options:
catcat files...
The cat function prints the contents of the files to stdout
testtest expression
[ expression +]+
[ --help
[ --version
See the documentation for the test function.
findfind expression
See the documentation for the find function.
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| Index: | All • Variables • Functions • Objects • Targets • Options |
