Initial release [0.1.0]

 * implemented conversion algorithm to convert `:=` (walrus) operations / **assignment expressions** to pre-3.8 compatible codes
 * implemented auto detection of line seperator and tab size based on source code context

Author: JarryShaw

Makefile

@@ -1,5 +1,7 @@
+export PIPENV_VERBOSITY=-1
+
 # get version string
-version  = $(shell cat poseur.py | grep "^__version__" | sed "s/__version__ = '\(.*\)'/\1/")
+version  = $(shell cat walrus.py | grep "^__version__" | sed "s/__version__ = '\(.*\)'/\1/")
 
 after: git-after
 clean: pypi-clean
@@ -25,8 +27,8 @@ formula: setup-formula
 	set -ae
 	cd Tap
 	git pull
-	git add Formula/poseur.rb
-	git commit -S -m "poseur: $(version)"
+	git add Formula/walrus.rb
+	git commit -S -m "walrus: $(version)"
 	git push
 
 test:
@@ -91,7 +93,7 @@ setup-formula: setup-version pipenv-update
 	pipenv run python scripts/setup-formula.py
 
 setup-manual: setup-version
-	pipenv run rst2man.py share/poseur.rst > share/poseur.1
+	pipenv run rst2man.py share/walrus.rst > share/walrus.1
 
 git-upload:
 	git pull
@@ -108,7 +110,7 @@ git-after:
 git-release:
 	go run github.com/aktau/github-release release \
 	    --user JarryShaw \
-	    --repo poseur \
+	    --repo walrus \
 	    --tag "v$(version)" \
-	    --name "poseur v$(version)" \
+	    --name "walrus v$(version)" \
 	    --description "$$(git log -1 --pretty=%B)"

Pipfile.lock

@@ -18,8 +18,6 @@ intelligent, yet imperfect, solution of a **backport compiler** by replacing *as
 old-fashioned assignment-then-conditional syntax, which guarantees you to always write *assignment expressions* in
 Python 3.8 flavour then compile for compatibility later.
 
-**NB**: `walrus` currently can only support *assignment expressions* used in `if` statements.
-
 ## Installation
 
 > Note that `walrus` only supports Python versions __since 3.3__ 🐍
@@ -73,7 +71,7 @@ optional arguments:
 archive options:
   duplicate original files in case there's any issue
 
-  -n, --no-archive      do not archive original files
+  -na, --no-archive     do not archive original files
   -p PATH, --archive-path PATH
                         path to archive original files (${CWD}/archive)
 
@@ -87,6 +85,8 @@ convert options:
   -s SEP, --linesep SEP
                         line separator to process source files (${OS_LINESEP})
   -nl, --no-linting     do not lint converted codes
+  -t INDENT, --tabsize INDENT
+                        indentation tab size (4)
 ```
 
   `walrus` will read then convert all *assignment expressions* syntax in every Python
@@ -108,6 +108,7 @@ such functions to check assignment expressions at runtime, if `-nl` not set.
 - `WALRUS_ENCODING` -- encoding to open source files (same as `--encoding` option in CLI)
 - `WALRUS_LINESEP` -- line separator to process source files (same as `--linesep` option in CLI)
 - `WALRUS_LINTING` -- lint converted codes (same as `--linting` option in CLI)
+- `WALRUS_TABSIZE` -- indentation tab size (same as `--tabsize` option in CLI)
 
 ### APIs
 
@@ -128,6 +129,7 @@ Envs:
 - `WALRUS_VERSION`-- convert against Python version (same as `--python` option in CLI)
 - `WALRUS_LINESEP` -- line separator to process source files (same as `--linesep` option in CLI)
 - `WALRUS_LINTING` -- lint converted codes (same as `--linting` option in CLI)
+- `WALRUS_TABSIZE` -- indentation tab size (same as `--tabsize` option in CLI)
 
 Raises:
 
@@ -149,6 +151,7 @@ Envs:
 - `WALRUS_VERSION`-- convert against Python version (same as `--python` option in CLI)
 - `WALRUS_LINESEP` -- line separator to process source files (same as `--linesep` option in CLI)
 - `WALRUS_LINTING` -- lint converted codes (same as `--linting` option in CLI)
+- `WALRUS_TABSIZE` -- indentation tab size (same as `--tabsize` option in CLI)
 
 Returns:
 
@@ -167,7 +170,7 @@ class ConvertError(SyntaxError):
 
 ## Test
 
-  See [`test.py`](https://github.com/JarryShaw/walrus/blob/master/scripts/test.py).
+  See [`tests`](https://github.com/JarryShaw/walrus/blob/master/tests) folder.
 
 ## Contribution
 

README.md

@@ -0,0 +1 @@
+/usr/local/Homebrew/Library/Taps/jarryshaw/homebrew-tap/Generator/scripts/walrus.py

scripts/setup-formula.py

@@ -15,7 +15,7 @@
     long_desc = file.read()
 
 # version string
-__version__ = '0.0.0.dev0'
+__version__ = '0.1.0'
 
 # set-up script for pip distribution
 setup(

setup.py

@@ -0,0 +1,133 @@
+.\" Man page generated from reStructuredText.
+.
+.TH WALRUS 1 "November 25, 2019" "v0.1.0" ""
+.SH NAME
+walrus \- back-port compiler for Python 3.8 assignment expression
+.
+.nr rst2man-indent-level 0
+.
+.de1 rstReportMargin
+\\$1 \\n[an-margin]
+level \\n[rst2man-indent-level]
+level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
+-
+\\n[rst2man-indent0]
+\\n[rst2man-indent1]
+\\n[rst2man-indent2]
+..
+.de1 INDENT
+.\" .rstReportMargin pre:
+. RS \\$1
+. nr rst2man-indent\\n[rst2man-indent-level] \\n[an-margin]
+. nr rst2man-indent-level +1
+.\" .rstReportMargin post:
+..
+.de UNINDENT
+. RE
+.\" indent \\n[an-margin]
+.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]]
+.nr rst2man-indent-level -1
+.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
+.in \\n[rst2man-indent\\n[rst2man-indent-level]]u
+..
+.SH SYNOPSIS
+.sp
+walrus [\fIoptions\fP] <\fIpython source files and folders\fP> ...
+.SH DESCRIPTION
+.sp
+Since PEP 572, Python introduced \fIassignment expressions\fP syntax in
+version __3.8__. For those who wish to use \fIassignment expressions\fP
+in their code, \fIwalrus\fP provides an intelligent, yet imperfect,
+solution of a \fBbackport compiler\fP by replacing \fIassignment expressions\fP
+syntax with old\-fashioned assignment\-then\-conditional syntax, which
+guarantees you to always write \fIassignment expressions\fP in Python 3.8
+flavour then compile for compatibility later.
+.SH OPTIONS
+.SS positional arguments
+.INDENT 0.0
+.TP
+.B SOURCE
+python source files and folders to be converted
+.UNINDENT
+.SS optional arguments
+.INDENT 0.0
+.TP
+.B \-h\fP,\fB  \-\-help
+show this help message and exit
+.TP
+.B \-V\fP,\fB  \-\-version
+show program\(aqs version number and exit
+.TP
+.B \-q\fP,\fB  \-\-quiet
+run in quiet mode
+.UNINDENT
+.SS archive options
+.sp
+duplicate original files in case there\(aqs any issue
+.INDENT 0.0
+.TP
+.BI \-n\fB a\fP,\fB \ \-\-no\-archive
+do not archive original files
+.UNINDENT
+.INDENT 0.0
+.TP
+.B \-p \fIPATH\fP, \-\-archive\-path \fIPATH\fP
+path to archive original files
+.UNINDENT
+.SS convert options
+.sp
+compatibility configuration for none\-unicode files
+.INDENT 0.0
+.TP
+.B \-c \fICODING\fP, \-\-encoding \fICODING\fP
+encoding to open source files
+.TP
+.B \-v \fIVERSION\fP, \-\-python \fIVERSION\fP
+convert against Python version
+.TP
+.B \-s \fISEP\fP, \-\-linesep \fISEP\fP
+line separator to process source files
+.UNINDENT
+.INDENT 0.0
+.TP
+.BI \-n\fB l\fP,\fB \ \-\-no\-linting
+do not lint converted codes
+.UNINDENT
+.INDENT 0.0
+.TP
+.B \-t \fIINDENT\fP, \-\-tabsize \fIINDENT\fP
+indentation tab size
+.UNINDENT
+.SH ENVIRONMENT
+.sp
+\fBwalrus\fP currently supports two environment variables.
+.INDENT 0.0
+.TP
+.B WALRUS_QUIET
+run in quiet mode
+.TP
+.B WALRUS_ENCODING
+encoding to open source files
+.TP
+.B WALRUS_VERSION
+convert against Python version
+.TP
+.B WALRUS_LINESEP
+line separator to process source files
+.TP
+.B WALRUS_LINTING
+lint converted codes
+.TP
+.B WALRUS_TABSIZE
+indentation tab size
+.UNINDENT
+.SH SEE ALSO
+.sp
+babel(1), f2format(1), poseur(1), vermin(1)
+.SH AUTHOR
+Jarry Shaw, a newbie programmer, is the author, owner and maintainer
+of walrus. Please contact me at [email protected].
+.SH COPYRIGHT
+walrus is licensed under the MIT License.
+.\" Generated by docutils manpage writer.
+.

share/walrus.1

@@ -6,8 +6,8 @@ walrus
 back-port compiler for Python 3.8 assignment expression
 -------------------------------------------------------
 
-:Version: v0.3.1
-:Date: October 24, 2019
+:Version: v0.1.0
+:Date: November 25, 2019
 :Manual section: 1
 :Author:
     Jarry Shaw, a newbie programmer, is the author, owner and maintainer
@@ -23,7 +23,13 @@ walrus [*options*] <*python source files and folders*> ...
 DESCRIPTION
 ===========
 
-
+Since PEP 572, Python introduced *assignment expressions* syntax in
+version __3.8__. For those who wish to use *assignment expressions*
+in their code, `walrus` provides an intelligent, yet imperfect,
+solution of a **backport compiler** by replacing *assignment expressions*
+syntax with old-fashioned assignment-then-conditional syntax, which
+guarantees you to always write *assignment expressions* in Python 3.8
+flavour then compile for compatibility later.
 
 OPTIONS
 =======
@@ -66,6 +72,9 @@ compatibility configuration for none-unicode files
 
 -nl, --no-linting     do not lint converted codes
 
+-t *INDENT*, --tabsize *INDENT*
+                      indentation tab size
+
 ENVIRONMENT
 ===========
 
@@ -76,6 +85,7 @@ ENVIRONMENT
 :WALRUS_VERSION:      convert against Python version
 :WALRUS_LINESEP:      line separator to process source files
 :WALRUS_LINTING:      lint converted codes
+:WALRUS_TABSIZE:      indentation tab size
 
 SEE ALSO
 ========