supported nested content within ini file (#667)

This PR addresses the issue of being able to read nested content within an ini files.

For example AWS config file could have the following (this is prep work for #667):

[profile development]
s3 =
  max_concurrent_requests = 20
  max_queue_size = 10000
  multipart_threshold = 64MB

Previously paws would keep everything a as flattened list.

# paws.common 0.6.0
paws.common:::read_ini("data_ini")
#> $default
#> $default$arg1
#> [1] "value1"
#> 
#> $default$arg2
#> [1] "value2"
#> 
#> 
#> $foo
#> $foo$arg1
#> [1] "foo_value1"
#> 
#> $foo$arg2
#> [1] "foo_value2"
#> 
#> 
#> $`profile bar`
#> $`profile bar`$arg1
#> [1] "bar_value1"
#> 
#> $`profile bar`$arg2
#> [1] "bar_value2"
#> 
#> 
#> $equalsign
#> $equalsign$arg1
#> [1] "value1=="
#> 
#> $equalsign$arg2
#> [1] "value2"
#> 
#> 
#> $spaces
#> $spaces$arg1
#> [1] "value1"
#> 
#> $spaces$arg2
#> [1] "value2"
#> 
#> 
#> $`profile sts`
#> $`profile sts`$sts_regional_endpoint
#> [1] "legacy"
#> 
#> 
#> $nested
#> $nested$nested1
#> [1] ""
#> 
#> $nested$arg1
#> [1] "value1"
#> 
#> $nested$arg2
#> [1] "value2"
#> 
#> $nested$arg3
#> [1] "value3"
#> 
#> $nested$nested2
#> [1] ""
#> 
#> $nested$arg4
#> [1] "value4"

^{Created on 2023-09-14 with reprex v2.0.2}

Now paws will include nested contents as a nest list.

# paws.common 0.6.0.9000
paws.common:::read_ini("data_ini")
#> $default
#> $default$arg1
#> [1] "value1"
#> 
#> $default$arg2
#> [1] "value2"
#> 
#> 
#> $foo
#> $foo$arg1
#> [1] "foo_value1"
#> 
#> $foo$arg2
#> [1] "foo_value2"
#> 
#> 
#> $`profile bar`
#> $`profile bar`$arg1
#> [1] "bar_value1"
#> 
#> $`profile bar`$arg2
#> [1] "bar_value2"
#> 
#> 
#> $equalsign
#> $equalsign$arg1
#> [1] "value1=="
#> 
#> $equalsign$arg2
#> [1] "value2"
#> 
#> 
#> $spaces
#> $spaces$arg1
#> [1] "value1"
#> 
#> $spaces$arg2
#> [1] "value2"
#> 
#> 
#> $`profile sts`
#> $`profile sts`$sts_regional_endpoint
#> [1] "legacy"
#> 
#> 
#> $nested
#> $nested$arg3
#> [1] "value3"
#> 
#> $nested$nested1
#> $nested$nested1$arg1
#> [1] "value1"
#> 
#> $nested$nested1$arg2
#> [1] "value2"
#> 
#> 
#> $nested$nested2
#> $nested$nested2$arg4
#> [1] "value4"

^{Created on 2023-09-14 with reprex v2.0.2}

The new method for read_ini does have some performance improvement however it is hardly noticeable 😛 (roughly ~0.5ms improvement)

Codecov Report

Patch coverage has no change and project coverage change: +0.04% :tada:

Comparison is base (34b6d72) 84.00% compared to head (bfd3784) 84.05%.

:exclamation: Current head bfd3784 differs from pull request most recent head 027057b. Consider uploading reports for the commit 027057b to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #673 +/- ## ========================================== + Coverage 84.00% 84.05% +0.04% ========================================== Files 201 201 Lines 14365 14422 +57 ========================================== + Hits 12068 12122 +54 - Misses 2297 2300 +3 ``` [see 3 files with indirect coverage changes](https://app.codecov.io/gh/paws-r/paws/pull/673/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=paws-r)

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paws-r / paws

supported nested content within ini file (#667) #673

Codecov Report