Chris McDonough mcdonc

Here is a simple footnote¹. With some additional text after it.

We again reference the same footnote¹. With some additional text after it.

My reference. ↩ ↩²

I am using a project that uses skopeo under the hood. It generates a image json file that represents some Nix software that should be copied into a container image.

I noticed a problem when I attempted to generate a particular container image. I debugged it to the point that I was able to know what command was "failing", and this turned out to be a skopeo copy command. When I run that skopeo copy command, it actually appears to succeed fine, but nothing winds up in the target container registry (the local :docker-daemon).

I know skopeo is working in general on this system to generate images from Nix because I am totally able to generate a different container image within a different configuration, it works fine.

`writeTextFile`, `writeText`, `writeTextDir`, `writeScript`, `writeScriptBin` {#trivial-builder-writeText}

These functions write text to a file within the Nix store. This is useful for creating files from Nix expressions, which may be scripts or just non-executable text files, depending on the function used and its arguments.

writeTextFile takes an attribute set and expects two arguments, name and text. name corresponds to the name used in the Nix store path. text will be the contents of the file. You can also set executable to true to make this file have the executable bit set.

Many more commands wrap writeTextFile including writeText, writeTextDir, writeScript, and writeScriptBin. These are convenience functions over writeTextFile.

Here are a few examples:

	{
	description = "Langusta - link aggregator in Elixir";

	inputs.nixpkgs.url = "flake:nixpkgs";
	inputs.flake-parts.url = "github:hercules-ci/flake-parts";

	inputs.devenv = {
	url = "github:cachix/devenv/python-rewrite";
	inputs.nixpkgs.follows = "nixpkgs";
	};

	#!/usr/bin/env python3
	import os
	import re
	import sys

	envvar_pattern = r'\$\{([^\}]+)\}'

	def replace_envvars(text, file_path):
	def replace(match):
	env_var = match.group(1)

	- github secrets

	- github integration (devcontainer)

	- VS code integration

	- analyze data sources

	- mongo

	❯ nix log /nix/store/8kivy1daix570b3g6yky3zf9cvsdmxa6-python3.11-vncdo-1.1.0.drv
	warning: The interpretation of store paths arguments ending in `.drv` recently changed. If this command is now failing try again with '/nix/store/8kivy1daix570b3g6yky3zf9cvsdmxa6-python3.11-vncdo-1.1.0.drv^*'
	Sourcing python-remove-tests-dir-hook
	Sourcing python-catch-conflicts-hook.sh
	Sourcing python-remove-bin-bytecode-hook.sh
	Sourcing setuptools-build-hook
	Using setuptoolsBuildPhase
	Using setuptoolsShellHook
	Sourcing pypa-install-hook
	Using pypaInstallPhase

	zlib zlibmodule.c -lz
	readline readline.c -lreadline
	_lzma _lzmamodule.c -llzma
	_sqlite3 _sqlite/cache.c _sqlite/connection.c _sqlite/cursor.c _sqlite/microprotocols.c _sqlite/module.c _sqlite/prepare_protocol.c _sqlite/row.c _sqlite/statement.c _sqlite/util.c -lsqlite3 -IModules/_sqlite
	_curses _cursesmodule.c -lncurses
	_bz2 _bz2module.c -lbz2
	_lzma _lzmamodule.c -llzma
	_ctypes _ctypes/callbacks.c _ctypes/cfield.c _ctypes/_ctypes_test.c _ctypes/malloc_closure.c _ctypes/callproc.c _ctypes/_ctypes.c _ctypes/stgdict.c -I_ctypes/ctypes_dlfcn.h -I_ctypes/ctypes.h -I_ctypes/_ctypes_test.h -lffi
	_hashlib _hashopenssl.c -lssl -lcrypto
	_ssl _ssl.c -lssl -lcrypto


	The state of open source nonlinear video editing on Linux is pretty good. Your needs are pretty basic. Two reasonably good editors exist that I have a lot of experience with. Kadin Live and Olive, these both work fine.



	But Kadin Live's UI is strange. It can be a little crashy. Olive's no longer maintained by its author. I hope somebody else picks that up. I really like Olive. There's a number of other contenders, but they all have one fatal flaw or another.



	Of course I knew about DaVinci Resolve. I'd even used it to make one video a year or two ago on Linux.

	nix-shell -p gcc libunistring libidn2 bash tzdata zlib zlib.dev readline readline.dev bzip2 bzip2.dev ncurses ncurses.dev \
	sqlite sqlite.dev openssl openssl.dev libuuid libuuid.dev gdbm lzlib tk tk.dev libffi libffi.dev expat expat.dev mailcap xz \
	xz.dev

Chris McDonough mcdonc

Footnotes

writeTextFile, writeText, writeTextDir, writeScript, writeScriptBin {#trivial-builder-writeText}

`writeTextFile`, `writeText`, `writeTextDir`, `writeScript`, `writeScriptBin` {#trivial-builder-writeText}