Add grep search (#37)

DESCRIPTION

@@ -23,7 +23,7 @@ BugReports: https://github.com/coatless-rpkg/searcher/issues
 Depends: R (>= 3.3.0)
 License: GPL (>= 2)
 Encoding: UTF-8
-RoxygenNote: 7.2.3
+RoxygenNote: 7.3.1
 Roxygen: list(markdown = TRUE)
 Suggests: 
     testthat (>= 2.1.0),

NAMESPACE

@@ -9,6 +9,7 @@ export(search_ecosia)
 export(search_gh)
 export(search_github)
 export(search_google)
+export(search_grep)
 export(search_ixquick)
 export(search_rscom)
 export(search_rseek)

NEWS.md

@@ -1,3 +1,13 @@
+# searcher 0.0.7
+
+## Features
+
+- Added search portal:
+    - `search_grep()`: Searches on grep.app. 
+      ([#35](https://github.com/r-assist/searcher/issues/35), 
+       [#37](https://github.com/r-assist/searcher/pull/37))
+
+
 # searcher 0.0.6
 
 ## Features

R/index-sites.R

@@ -45,6 +45,8 @@ site_index =
   list(
     site_entry("google", "https://google.com/search?q="),
     site_entry("bing", "https://bing.com/search?q="),
+    site_entry("grep", "https://grep.app/search?q=",
+               keywords = keyword_entry("&filter[lang][0]=R")),
     site_entry("duckduckgo", "https://duckduckgo.com/?q=", "ddg"),
     site_entry("startpage", "https://startpage.com/do/dsearch?query=", "sp"),
     site_entry("ecosia", "https://www.ecosia.org/search?q="),

R/search-functions.R

@@ -17,7 +17,7 @@
 #' @seealso [search_google()], [search_bing()], [search_duckduckgo()],
 #'          [search_startpage()], [search_rseek()], [search_twitter()],
 #'          [search_rstudio_community()], [search_stackoverflow()],
-#'          [search_github()], [search_bitbucket()], and [searcher()]
+#'          [search_github()], [search_grep()], [search_bitbucket()], and [searcher()]
 #' @examples
 #' # Search in a generic way
 #' search_site("r-project", "google")
@@ -55,6 +55,12 @@
 #' # Search all languages on GitHub Issues for bivariate normal
 #' search_github("bivariate normal", rlang = FALSE)
 #'
+#' # Search R code on GitHub for numerical optimization
+#' search_grep("optim")
+#'
+#' # Search all code on GitHub for numerical optimization
+#' search_grep("optim", rlang = FALSE)
+#'
 #' # Search BitBucket for assertions
 #' search_bitbucket("assertions")
 #'
@@ -79,6 +85,7 @@ search_site = function(query,
                          "so",
                          "github",
                          "gh",
+                         "grep",
                          "bitbucket",
                          "bb"
                        ),
@@ -102,6 +109,7 @@ search_site = function(query,
     so             = search_stackoverflow(query, rlang),
     github         = ,      # empty case carried below
     gh             = search_github(query, rlang),
+    grep           = search_grep(query, rlang),
     bitbucket      = ,      # empty case carried below
     bb             = search_bitbucket(query, rlang)
   )
@@ -295,6 +303,14 @@ search_github = searcher("gh")
 #' @export
 search_gh = search_github
 
+#' @rdname search_site
+#' @export
+#' @section grep.app Search:
+#' The `search_grep()` function searches all public code on
+#' [GitHub](https://github.com) using [grep.app](https://grep.app) by
+#' querying: `https://grep.app/search?q=<query-here>&filter[lang][0]=R`
+search_grep = searcher("grep")
+
 #' @rdname search_site
 #' @export
 #' @section BitBucket Search:

README.Rmd

@@ -64,10 +64,10 @@ The `search_*()` functions can be used to search a query directly from _R_ on
 major search engines, programming help websites, and code repositories. The following search
 platforms are supported: [Google](https://www.google.com), [Bing](https://www.bing.com/),
 [DuckDuckGo](https://duckduckgo.com/), [Startpage](https://www.startpage.com/en/),
-Ecosia, [rseek](https://rseek.org/),
-[Twitter](https://twitter.com/search), [StackOverflow](https://stackoverflow.com/search), 
+Ecosia, [rseek](https://rseek.org/), [Twitter](https://twitter.com/search), [StackOverflow](https://stackoverflow.com/search), 
 [RStudio Community](https://community.rstudio.com/search), 
-[GitHub](https://github.com/search), and [BitBucket](https://bitbucket.org/product/).
+[GitHub](https://github.com/search), [grep.app](https://grep.app/), 
+and [BitBucket](https://bitbucket.org/product/).
 By default, an appropriate suffix for each platform that ensures relevant 
 results to _R_ is appended to all queries. This behavior can be disabled by 
 using `rlang = FALSE`.
@@ -93,6 +93,10 @@ search_stackoverflow("linear regression", rlang = FALSE) # or search_so(...)
 search_rstudio_community("tips")
 search_rstudio_community("tips", rlang = FALSE)          # or search_rscom(...)
 
+# Searching GitHub code for graphs in R and other languages
+search_grep("graph")
+search_grep("graph", rlang = FALSE)
+
 # Searching GitHub Issues for maps in R and other languages
 search_github("maps")
 search_github("maps", rlang = FALSE)                     # or search_gh(...)
@@ -138,6 +142,7 @@ search_bing()
 search_ecosia()
 search_rseek()
 search_twitter()
+search_grep()
 search_duckduckgo()        # or search_ddg()
 search_startpage()         # or search_sp()
 search_stackoverflow()     # or search_so()