Implement projects

.gitattributes

@@ -3,3 +3,9 @@
 # checked out on. A CRLF checkout of repositories.R broke profile marker
 # matching on Windows (see src/hardcoded.rs).
 src/data/repositories.R text eol=lf
+
+# Same for the shim R package source: it is byte-hashed by
+# `cargo xtask gen-rvenv-shim`, so a CRLF checkout would look like a source
+# change and fail the CI drift check. The built packages are binary.
+src/data/rvenv-pkg/** text eol=lf
+src/data/rvenv-shim/*.tar.gz binary

.github/workflows/test.yaml

@@ -79,6 +79,7 @@ jobs:
         cargo test
         cargo test -p xtask
         cargo xtask gen-help --check
+        cargo xtask gen-rvenv-shim --check
 
     - name: Build rig
       run: |

Cargo.toml

@@ -97,6 +97,8 @@ serde = { version = "1.0", features = ["derive"] }
 serde_derive = "1.0"
 serde_json = "1.0"
 serde_yaml = "0.9"
+# rproj.lock (multi-target project lockfile)
+toml = "0.8"
 # hash url to get target path, for macOS installers
 sha2 = "0.9.8"
 # expand ~ in paths, e.g. in R_LIBS env vars, env vars for RStudio

Makefile

@@ -307,6 +307,15 @@ fonts-asset:
 help:
 	cargo xtask gen-help
 
+# Rebuild the pre-built shim R packages in src/data/rvenv-shim (one per R
+# version bracket) from the package source in src/data/rvenv-pkg. `rig proj
+# init` seeds one of them into a project's .rvenv/lib/rig. Needs the R
+# versions listed in xtask/src/rvenv_shim.rs and installs them with `rig add`
+# if they are missing, so this is a maintainer-only task; CI only runs
+# `cargo xtask gen-rvenv-shim --check`, which needs no R.
+rvenv-shim:
+	cargo xtask gen-rvenv-shim
+
 readme: README.md
 
 # Regenerate the command-line reference (website/reference/_commands.md) from

NEWS.md

@@ -26,6 +26,12 @@
 
 * New `rig proj tree` shows the dependency closure of a project as a tree.
 
+* `rig run` now uses the project environment, if you call it in a project
+  directory: it starts `.rvenv/bin/R`, with the project's package library
+  and the R version the project's lock file names, and it syncs the project
+  first if the environment is missing or out of date. Use `--no-project`
+  (or `--r-version`) to run the default R version instead.
+
 * `rig library add`, `rig library default`, `rig library list` and
   `rig library rm` have a new `--r-version` (`-r`) option, to operate on
   the libraries of an R version other than the default one.