# Factor
+![Build](https://github.com/factor/factor/actions/workflows/build.yml/badge.svg)
+
Factor is a [concatenative](https://www.concatenative.org), stack-based
programming language with [high-level
features](https://concatenative.org/wiki/view/Factor/Features/The%20language)
To check out Factor:
-* `git clone git://factorcode.org/git/factor.git`
+* `git clone git://github.com/factor/factor.git`
* `cd factor`
To build the latest complete Factor system from git, either use the
* Unix: `./build.sh update`
* Windows: `build.cmd`
+* M1 macOS: `arch -x86_64 ./build.sh update`
or download the correct boot image for your system from
-http://downloads.factorcode.org/images/master/, put it in the factor
+https://downloads.factorcode.org/images/master/, put it in the `factor`
directory and run:
* Unix: `make` and then `./factor -i=boot.unix-x86.64.image`
Now you should have a complete Factor system ready to run.
+Factor does not yet work on arm64 cpus. There is an arm64 assembler
+in `cpu.arm.assembler` and we are working on a port and also looking for
+contributors.
+
More information on [building factor](https://concatenative.org/wiki/view/Factor/Building%20Factor)
and [system requirements](https://concatenative.org/wiki/view/Factor/Requirements).
{ 4 8 15 16 23 42 } [ 2 * ] map .
-1000 [1,b] sum .
+1000 [1..b] sum .
4 <iota> [
"Happy Birthday " write
-run=listener run terminal listener
-run=ui.tools run Factor development UI
-e=<code> evaluate <code>
+ -ea=<code> evaluate <code> with auto-use
-no-user-init suppress loading of .factor-rc
-roots=<paths> a list of path-delimited extra vocab roots
* `misc/` - editor modes, icons, etc
* `unmaintained/` - now at [factor-unmaintained](https://github.com/factor/factor-unmaintained)
+## Source History
+
+During Factor's lifetime, sourcecode has lived in many repositories. Unfortunately, the first import in Git did not keep history. History has been partially recreated from what could be salvaged. Due to the nature of Git, it's only possible to add history without disturbing upstream work, by using replace objects. These need to be manually fetched, or need to be explicitly added to your git remote configuration.
+
+Use:
+`git fetch origin 'refs/replace/*:refs/replace/*'`
+
+or add the following line to your configuration file
+
+```
+[remote "origin"]
+ url = ...
+ fetch = +refs/heads/*:refs/remotes/origin/*
+ ...
+ fetch = +refs/replace/*:refs/replace/*
+```
+
+Then subsequent fetches will automatically update any replace objects.
+
## Community
-Factor developers meet in the `#concatenative` channel on
-[irc.freenode.net](http://freenode.net). Drop by if you want to discuss
+Factor developers used to meet in the `#concatenative` channel on
+[irc.libera.chat](http://libera.chat). Drop by if you want to discuss
anything related to Factor or language design in general.
* [Factor homepage](https://factorcode.org)
* [Concatenative languages wiki](https://concatenative.org)
+* [Join the mailing list](https://concatenative.org/wiki/view/Factor/Mailing%20list)
+* [Join the Factor Discord](http://discord.gg/QxJYZx3QDf)
+* Search for "factorcode" on [Gitter](https://gitter.im/)
Have fun!