Permission Denied from rust-analyzer

[DaneSlattery]

Rust analyzer cannot write to the target directory.

I am running docker on Ubuntu 24.

When using this image idf-rust:esp32_latest, with the dev container definition from the template, I see the following error from rust-analyzer

error: failed to create directory `/home/esp/ppm/target/xtensa-esp32-espidf/debug/.fingerprint/ppm-17e5cca47ed3fd90`

Caused by:
  Permission denied (os error 13)

From the command line on the container, the workspace is mounted as root.:

esp@9927be9ce188:~/ppm$ ls -l
total 132
-rw-rw-r-- 1 root root 64347 Jul 26 12:56 Cargo.lock
-rw-rw-r-- 1 root root   323 Jul 26 09:32 Cargo.toml
-rw-rw-r-- 1 root root  3223 Jul 26 09:32 README.md
-rw-rw-r-- 1 root root  1568 Jul 26 09:32 azure-pipelines.yml
-rw-rw-r-- 1 root root   413 Jul 26 10:33 components_esp32.lock
drwxrwxr-x 2 root root  4096 Jul 26 09:32 docs
-rw-rw-r-- 1 root root  3072 Jul 26 09:32 partitions.bin
drwxrwxr-x 3 root root  4096 Jul 26 10:33 ppm
drwxrwxr-x 3 root root  4096 Jul 26 10:33 ppm-arduino
drwxrwxr-x 3 root root  4096 Jul 26 13:10 ppm-esp32
drwxrwxr-x 4 root root  4096 Jul 26 09:32 ppm-web
-rw-rw-r-- 1 root root   101 Jul 26 10:32 rust-toolchain.toml
drwxrwxr-x 5 root root  4096 Jul 26 10:33 rust-web
drwxrwxr-x 2 root root  4096 Jul 26 09:32 scripts
-rw-rw-r-- 1 root root   923 Jul 26 12:55 sdkconfig.defaults
drwxrwxr-x 4 root root  4096 Jul 26 10:33 stpm3x
drwxrwxr-x 5 root root  4096 Jul 26 12:56 target
drwxrwxr-x 4 root root  4096 Jul 26 09:32 win_stpm3x

, while locally, the files are owned by my user:

dane@dane-Latitude-5531  ~/dev/PolarPowerMeter   website ±  ls -l
total 132
-rw-rw-r-- 1 dane dane  1568 Jul 26 11:32 azure-pipelines.yml
-rw-rw-r-- 1 dane dane 64347 Jul 26 14:56 Cargo.lock
-rw-rw-r-- 1 dane dane   323 Jul 26 11:32 Cargo.toml
-rw-rw-r-- 1 dane dane   413 Jul 26 12:33 components_esp32.lock
drwxrwxr-x 2 dane dane  4096 Jul 26 11:32 docs
-rw-rw-r-- 1 dane dane  3072 Jul 26 11:32 partitions.bin
drwxrwxr-x 3 dane dane  4096 Jul 26 12:33 ppm
drwxrwxr-x 3 dane dane  4096 Jul 26 12:33 ppm-arduino
drwxrwxr-x 3 dane dane  4096 Jul 26 15:10 ppm-esp32
drwxrwxr-x 4 dane dane  4096 Jul 26 11:32 ppm-web
-rw-rw-r-- 1 dane dane  3223 Jul 26 11:32 README.md
-rw-rw-r-- 1 dane dane   101 Jul 26 12:32 rust-toolchain.toml
drwxrwxr-x 5 dane dane  4096 Jul 26 12:33 rust-web
drwxrwxr-x 2 dane dane  4096 Jul 26 11:32 scripts
-rw-rw-r-- 1 dane dane   923 Jul 26 14:55 sdkconfig.defaults
drwxrwxr-x 4 dane dane  4096 Jul 26 12:33 stpm3x
drwxrwxr-x 5 dane dane  4096 Jul 26 14:56 target
drwxrwxr-x 4 dane dane  4096 Jul 26 11:32 win_stpm3x

The docker user has the following id:

uid=1000(esp) gid=1000(esp) groups=1000(esp)

My local user has the following id:

uid=1000(dane) gid=1000(dane) groups=1000(dane),4(adm),20(dialout),24(cdrom),27(sudo),30(dip),46(plugdev),100(users),114(lpadmin),984(docker)

I have tried:

1. Setting "remoteUser":"esp" in devcontainer.json.
2. Adding this to the Dockerfile after adduser --disabled-password --gecos "" ${CONTAINER_USER}:

   https://code.visualstudio.com/remote/advancedcontainers/add-nonroot-user#_change-the-uidgid-of-an-existing-container-user

What seems to have worked is to change the ownership of the mounted files on the container:

chown -R esp .

I'm wondering if this is something that we can address, either in the container or in the template.

[DaneSlattery]

Further investigation to this: changing the ownership of the mounted files prevents files from being used by the local user. For example, the built artifacts cannot be deployed using web-flash.

[DaneSlattery]

Even more days down this rabbit hole: Docker Desktop mounts this with root:root ownership. Docker CE mounts with the correct ownership!