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Diffstat (limited to 'source')
3 files changed, 162 insertions, 2 deletions
diff --git a/source/blog/2014-12-23-mpv-launcher.md b/source/blog/2014-12-23-mpv-launcher.md index c8c2aee2..b377aa1d 100644 --- a/source/blog/2014-12-23-mpv-launcher.md +++ b/source/blog/2014-12-23-mpv-launcher.md @@ -8,7 +8,7 @@ date-display: December 23, 2014 I just noticed that `daemonize` doesn't play too well with the OS; in particular, when you use dark menu bar on OS X Yosemite, apps launched with `daemonize` won't conform to that. So a native shell solution would be using `/bin/zsh` and run ```zsh -mpv "$@" >/dev/null 2>&1 </dev/null &! +mpv $@ &>/dev/null </dev/null &! ``` instead. diff --git a/source/blog/2015-05-19-bash-the-special-slash-character-in-filename-expansion.md b/source/blog/2015-05-19-bash-the-special-slash-character-in-filename-expansion.md index 0b2b0949..7e6c6e3a 100644 --- a/source/blog/2015-05-19-bash-the-special-slash-character-in-filename-expansion.md +++ b/source/blog/2015-05-19-bash-the-special-slash-character-in-filename-expansion.md @@ -19,7 +19,7 @@ bash-4.3$ [[ /usr/bin == /usr@(/bin|/lib) ]] && echo matching matching ``` -As seen from this example, patterns with slash simply doesn't work (in filename expansion) when place in an extended glob pattern list, and there's no error whatsoever. I looked up the [Bash Reference Manual](https://www.gnu.org/software/bash/manual/html_node/Pattern-Matching.html#Pattern-Matching) and the [Bash Guide](http://mywiki.wooledge.org/BashGuide/Patterns) but neither mentioned this behavior. One might need to delve into the source code to say for sure what exactly is going on. +As seen from this example, patterns with slash simply doesn't work (in filename expansion) when placed in an extended glob pattern list, and there's no error whatsoever. I looked up the [Bash Reference Manual](https://www.gnu.org/software/bash/manual/html_node/Pattern-Matching.html#Pattern-Matching) and the [Bash Guide](http://mywiki.wooledge.org/BashGuide/Patterns) but neither mentioned this behavior. One might need to delve into the source code to say for sure what exactly is going on. In comparison, Zsh and its [docs](http://zsh.sourceforge.net/Doc/Release/Expansion.html#Filename-Generation) are much more up front about this issue: diff --git a/source/blog/2015-05-22-using-a-command-table-as-wallpaper.md b/source/blog/2015-05-22-using-a-command-table-as-wallpaper.md new file mode 100644 index 00000000..85be7658 --- /dev/null +++ b/source/blog/2015-05-22-using-a-command-table-as-wallpaper.md @@ -0,0 +1,160 @@ +--- +title: "Using a command table as wallpaper" +date: 2015-05-22T00:48:19-07:00 +date-display: May 22, 2015 +--- +Recently I cleaned up my source code directory, removed a lot of rarely-used, dated scripts, and grouped the remaining standalone scripts into a central place (`~/dev/scripts`)[^dev]. One thing I learned in this process is that I tend to write a reusable script but rarely actually reuse it (even if it sits on `PATH`), sometimes implementing the same functionality twice or typing a long command line over and over again. + +[^dev]: The `~/dev` directory stands for development, and contains all my source code and almost all local builds. The point is by having a `~/dev` directory, I no longer need to have `bin`, `include`, `lib`, and `share` in my `HOME`, thus saving a few slots. Backing up and restoring is also slightly easier. + +To remind myself of which scripts are at my fingertip, I decided to use a command table as wallpaper on my secondary display. So I wrote a shitty Python script[^shitty] (depending on XeLaTeX and ImageMagick) to automate the generation of such a wallpaper. It's pretty customizable, and anyone may grab it and do whatever they want to with it (also [available as a gist](https://gist.github.com/zmwangx/b06aa923abf061b33fc9)): + +[^shitty]: Yeah, I know it's a shitty script, so don't nitpick on style problems. + +```python +#!/usr/bin/env python + +"""Generate command table.""" + +import argparse +import os +import shlex +import subprocess +import sys +import tempfile + +# pylint: disable=wildcard-import,unused-wildcard-import + +from zmwangx.colorout import * + +DEFAULT_COLUMN_WIDTH = 120 +DEFAULT_FOREGROUND_COLOR = "white" +DEFAULT_BACKGROUND_COLOR = "black" +DEFAULT_FONT = "Consolas" +DEFAULT_BORDER = 20 +DEFAULT_DENSITY = 300 +DEFAULT_SIZE = "1280x800" + +HERE = os.path.dirname(os.path.realpath(sys.argv[0])) +XELATEX_PROGRAM = (r""" +\documentclass[varwidth=\maxdimen,border={border}pt]{{standalone}} +\usepackage{{color}} +\pagecolor{{{background}}} +\color{{{foreground}}} +\usepackage{{fontspec}} +\setmonofont{{{font}}} + +\begin{{document}} +\begin{{verbatim}} +{table} +\end{{verbatim}} +\end{{document}} +""") + +def text_table(**kwargs): + """Generate the text version of the table.""" + width = kwargs["width"] if "width" in kwargs else DEFAULT_COLUMN_WIDTH + directory = kwargs["directory"] if "directory" in kwargs else HERE + command_line = (r"find {directory} -maxdepth 1 -type f -perm -u=x -exec basename {{}} \; " + "| column -c {width} | expand".format( + directory=shlex.quote(directory), width=width)) + ccommand(command_line) + return subprocess.check_output(command_line, shell=True).decode("utf-8") + +def pdf_table(**kwargs): + """Generate the PDF version of the table. + + Returns 0 on success or 1 on failure. Generated PDF is "table.pdf" + in the current working directory. + + """ + border = kwargs["border"] if "border" in kwargs else DEFAULT_BORDER + foreground = kwargs["foreground"] if "foreground" in kwargs else DEFAULT_FOREGROUND_COLOR + background = kwargs["background"] if "background" in kwargs else DEFAULT_BACKGROUND_COLOR + font = kwargs["font"] if "font" in kwargs else DEFAULT_FONT + program = XELATEX_PROGRAM.format(table=text_table(**kwargs).strip(), + font=font, border=border, + foreground=foreground, background=background) + with open("table.tex", "w") as texfileobj: + texfileobj.write(program) + try: + ccommand("xelatex table.tex") + subprocess.check_call(["xelatex", "table.tex"], + stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL) + return 0 + except subprocess.CalledProcessError: + cerror("xelatex failed on the following program:") + cerrnewline() + cerrwrite("default", program) + return 1 + +def png_table(**kwargs): + """Generate the PNG version of the table. + + Returns 0 on success or 1 on failure. Generated PNG is "table.png" + in the current working directory. + + """ + if pdf_table(**kwargs) == 1: + return 1 + density = kwargs["density"] if "density" in kwargs else DEFAULT_DENSITY + size = kwargs["size"] if "size" in kwargs else DEFAULT_SIZE + background = kwargs["background"] if "background" in kwargs else DEFAULT_BACKGROUND_COLOR + command_line = ("convert -density {density} table.pdf -resize {size} -size {size} " + "xc:{background} +swap -gravity center -composite table.png".format( + density=density, size=size, background=background)) + try: + ccommand(command_line) + subprocess.check_call(shlex.split(command_line)) + return 0 + except subprocess.CalledProcessError: + cerror("the following ImageMagick command failed:") + cerrprint("default", command_line) + return 1 + +def main(): + """CLI.""" + description = "Generate a PNG table of all executable commands in a directory." + parser = argparse.ArgumentParser(description=description) + parser.add_argument("--width", type=int, default=DEFAULT_COLUMN_WIDTH, + help="""line width, default is 120""") + parser.add_argument("--directory", + help="""directory containing executables, default is + the directory containing this command""") + parser.add_argument("--border", type=int, default=DEFAULT_BORDER, + help="""default is 20pt""") + parser.add_argument("--foreground", default=DEFAULT_FOREGROUND_COLOR, + help="""foreground color, default is white""") + parser.add_argument("--background", default=DEFAULT_BACKGROUND_COLOR, + help="""background color, default is black""") + parser.add_argument("--font", default=DEFAULT_FONT, + help="""default is Consolas""") + parser.add_argument("--density", default=DEFAULT_DENSITY, + help="""used for the -density argument of convert, + default is 300""") + parser.add_argument("--size", default=DEFAULT_SIZE, + help="""size of image, default is 1280x800""") + args = parser.parse_args() + kwargs = {k: v for (k, v) in args.__dict__.items() if v is not None} + + fd, tmpfilepath = tempfile.mkstemp(suffix=".png", prefix="table-") + os.close(fd) + with tempfile.TemporaryDirectory(prefix="table-") as working_directory: + os.chdir(working_directory) + if png_table(**kwargs) == 1: + cerror("execution failed") + os.remove(tmpfilepath) + else: + os.rename("table.png", tmpfilepath) + cprogress("saved to:") + print(tmpfilepath) + +if __name__ == "__main__": + main() +``` + +By the way, the `zmwangx.colorout` module is [here](https://github.com/zmwangx/pyzmwangx/blob/41b0bffaad9439888d68097a85c7aed594240283/zmwangx/colorout.py), just to ease the printing of progress and errors to tty. You may safely remove all the `ccommand`, `cerr*` and `cprogress` calls. + +Here is an example wallpaper reflecting my current `~/dev/scripts`: + + |