118 lines
4.3 KiB
Markdown
118 lines
4.3 KiB
Markdown
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---
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title: "Site Update: I Fixed the Patron Page"
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date: 2022-05-18
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---
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So I fixed [the patron page](https://christine.website/patrons) and the
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underlying issue was stupid enough that I feel like explaining it so you all can
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learn from my mistake.
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<xeblog-conv name="Numa" mood="delet">For those of you playing the christine dot
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website home game, look
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[here](https://github.com/Xe/site/commit/e2b9f384bf4033eddf321b5b5020ac4847609b37)
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to see the fix and play along!</xeblog-conv>
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My blog is basically a thin wrapper around two basic things:
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1. Markdown files (such as for this article you are reading right now)
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2. Static files (such as for the CSS that is making this article look nice)
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When I create a package out of my blog's code, I have a layout that resembles
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the directory structure in my git repo:
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```console
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$ ls -l /nix/store/crc94hqyb546w3w9fzdyr8zvz3xf3p1j-xesite-2.4.0
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total 64
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dr-xr-xr-x 2 root root 4096 Dec 31 1969 bin/
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dr-xr-xr-x 2 root root 20480 Dec 31 1969 blog/
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-r--r--r-- 24 root root 8663 Dec 31 1969 config.dhall
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dr-xr-xr-x 2 root root 4096 Dec 31 1969 css/
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dr-xr-xr-x 2 root root 4096 Dec 31 1969 gallery/
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-r--r--r-- 52 root root 5902 Dec 31 1969 signalboost.dhall
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dr-xr-xr-x 12 root root 4096 Dec 31 1969 static/
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dr-xr-xr-x 2 root root 4096 Dec 31 1969 talks/
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```
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Here is my git repo for comparison:
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```console
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$ ls -l
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total 188
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drwxr-xr-x 2 cadey users 20480 May 18 20:21 blog/
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-rw-r--r-- 1 cadey users 77521 May 18 20:15 Cargo.lock
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-rw-r--r-- 1 cadey users 1795 May 18 20:15 Cargo.toml
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-rw-r--r-- 1 cadey users 198 Oct 30 2020 CHANGELOG.md
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-rw-r--r-- 1 cadey users 2779 Apr 5 20:32 config.dhall
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drwxr-xr-x 2 cadey users 4096 Apr 16 11:56 css/
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-rw-r--r-- 1 cadey users 1325 Jan 15 2021 default.nix
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drwxr-xr-x 2 cadey users 4096 Mar 15 2020 docs/
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drwxr-xr-x 2 cadey users 4096 Mar 21 20:23 examples/
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-rw-r--r-- 1 cadey users 1882 Apr 30 16:13 flake.lock
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-rw-r--r-- 1 cadey users 6547 Apr 24 20:35 flake.nix
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drwxr-xr-x 2 cadey users 4096 Jun 17 2020 gallery/
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drwxr-xr-x 6 cadey users 4096 Mar 21 20:23 lib/
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-rw-r--r-- 1 cadey users 887 Jan 1 2021 LICENSE
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drwxr-xr-x 2 cadey users 4096 Dec 18 00:06 nix/
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-rw-r--r-- 1 cadey users 1467 Feb 21 20:39 README.md
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drwxr-xr-x 2 cadey users 4096 Mar 21 21:21 scripts/
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-rw-r--r-- 1 cadey users 5902 May 18 16:44 signalboost.dhall
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drwxr-xr-x 5 cadey users 4096 Apr 5 20:32 src/
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drwxr-xr-x 12 cadey users 4096 Jan 10 17:22 static/
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drwxr-xr-x 2 cadey users 4096 Nov 10 2021 talks/
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drwxr-xr-x 4 cadey users 4096 Apr 16 09:56 target/
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drwxr-xr-x 2 cadey users 4096 May 15 07:59 templates/
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```
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The main problem is that my site expects all of this to be in the current
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working directory. In my site's systemd unit I have a launch script that looks
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like this:
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```nix
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script = let site = packages.default;
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in ''
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export SOCKPATH=${cfg.sockPath}
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export DOMAIN=${toString cfg.domain}
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cd ${site}
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exec ${site}/bin/xesite
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'';
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```
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However the Nix store isn't writable by user code. My patreon API client looked
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for its credentials in the current working directory. When I set it up on the
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target server I put the credentials in `/srv/within/xesite/.patreon.json`,
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thinking that the `WorkingDirectory` setting would make it Just Work:
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```nix
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WorkingDirectory = "/srv/within/xesite";
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```
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But this was immediately blown away by the `cd` command on line 4 of the script.
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I have fixed this by making my Patreon client put its credentials in the home
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directory explicitly with this fragment of code:
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```rust
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let mut p = dirs::home_dir().unwrap_or(".".into());
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p.push(".patreon.json");
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```
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This will make the Patreon credentials get properly stored in the service's home
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directory (which is writable). This will also make the patrons page work
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persistently without having to manually rotate secrets every month.
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Here's a good lesson for you all, make sure to print out the absolute path of
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everything in error messages. For the longest time I had to debug this from this
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error message:
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```
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patrons: xesite::app: ".patreon.json" does not exist
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```
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I was looking at the directory `/srv/within/xesite` and I saw it existing right
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in front of my eyes. This made me feel like I was going crazy and I've been
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putting off fixing it because of that. However, it's a simple fix and I was
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blind.
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<xeblog-conv name="Cadey"
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mood="coffee">aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</xeblog-conv>
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