Suggest stringr as needed by starter::create_project()

[yihui]

Previously this soft dependency doesn't need to be explicitly declared because rmarkdown has been suggested, which requires stringr (which in turn requires stringi). Now the dependency is no longer guaranteed in rmarkdown (rstudio/rmarkdown#2530), so starter has to explicitly declare the dependency, otherwise it will fail R CMD check:

── Failure ('test-create_project.R:6:3'): create_project() works ───────────────
    `create_project(...)` threw an unexpected error.
    Message: there is no package called 'stringr'
    Class:   packageNotFoundError/error/condition
    Backtrace:
         ▆
      1. ├─testthat::expect_error(...) at test-create_project.R:6:3
      2. │ └─testthat:::expect_condition_matching(...)
      3. │   └─testthat:::quasi_capture(...)
      4. │     ├─testthat (local) .capture(...)
      5. │     │ └─base::withCallingHandlers(...)
      6. │     └─rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
      7. └─starter::create_project(...)
      8.   └─starter:::evaluate_project_template(...)
      9.     └─base::tryCatch(...)
     10.       └─base (local) tryCatchList(expr, classes, parentenv, handlers)
     11.         └─base (local) tryCatchOne(...)
     12.           └─value[[3L]](cond)
    ── Failure ('test-create_project.R:19:3'): create_project() works ──────────────
    `create_project(...)` threw an unexpected error.
    Message: there is no package called 'stringr'
    Class:   packageNotFoundError/error/condition
    Backtrace:
         ▆
      1. ├─testthat::expect_error(...) at test-create_project.R:19:3
      2. │ └─testthat:::expect_condition_matching(...)
      3. │   └─testthat:::quasi_capture(...)
      4. │     ├─testthat (local) .capture(...)
      5. │     │ └─base::withCallingHandlers(...)
      6. │     └─rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
      7. └─starter::create_project(...)
      8.   └─starter:::evaluate_project_template(...)
      9.     └─base::tryCatch(...)
     10.       └─base (local) tryCatchList(expr, classes, parentenv, handlers)
     11.         └─base (local) tryCatchOne(...)
     12.           └─value[[3L]](cond)
    ── Failure ('test-create_project.R:32:3'): create_project() works ──────────────
    `create_project(...)` threw an unexpected error.
    Message: there is no package called 'stringr'
    Class:   packageNotFoundError/error/condition
    Backtrace:
         ▆
      1. ├─testthat::expect_error(...) at test-create_project.R:32:3
      2. │ └─testthat:::expect_condition_matching(...)
      3. │   └─testthat:::quasi_capture(...)
      4. │     ├─testthat (local) .capture(...)
      5. │     │ └─base::withCallingHandlers(...)
      6. │     └─rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
      7. └─starter::create_project(...)
      8.   └─starter:::evaluate_project_template(...)
      9.     └─base::tryCatch(...)
     10.       └─base (local) tryCatchList(expr, classes, parentenv, handlers)
     11.         └─base (local) tryCatchOne(...)
     12.           └─value[[3L]](cond)
    ── Error ('test-create_project.R:44:3'): create_project() works ────────────────
    Error in `setwd(proj_dir)`: cannot change working directory
    Backtrace:
        ▆
     1. └─base::setwd(proj_dir) at test-create_project.R:44:3

    [ FAIL 4 | WARN 0 | SKIP 0 | PASS 10 ]
    Error: Test failures
    Execution halted

[ddsjoberg]

thank you kindly for the PR @yihui !

[yihui]

You are welcome! It will be great if you can make a new CRAN release in the near future to avoid R CMD check failures there (sorry for the trouble!).

[ddsjoberg]

@yihui new version already submitted and accepted to CRAN , woohoo!