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| Original file line number | Diff line number | Diff line change |
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@@ -23,6 +23,7 @@ Imports: | |
| tools, | ||
| utils | ||
| Suggests: | ||
| processx, | ||
| testthat | ||
| Encoding: UTF-8 | ||
| LazyData: true | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,168 @@ | ||
| # for testing purpose | ||
|
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| LanguageClient <- R6::R6Class("LanguageClient", | ||
| private = list( | ||
| ticket = 0 | ||
| ), | ||
| public = list( | ||
| process = NULL, | ||
| rootUri = NULL, | ||
| ClientCapabilities = NULL, | ||
| ServerCapabilities = NULL, | ||
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| request_handlers = NULL, | ||
| notification_handlers = NULL, | ||
| response_handlers = NULL, | ||
|
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| initialize = function(cmd, args) { | ||
| self$process <- processx::process$new(cmd, args, | ||
| stdin = "|", stdout = "|", stderr = "|", supervise = TRUE) | ||
| self$register_handlers() | ||
| self$response_handlers <- collections::Dict$new() | ||
| }, | ||
|
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||
| get_ticket = function() { | ||
| private$ticket <- private$ticket + 1 | ||
| private$ticket | ||
| }, | ||
|
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||
| deliver = function(message, callback = NULL) { | ||
| if (!is.null(message)) { | ||
| self$process$write_input(message$format()) | ||
| logger$info("deliver: ", class(message)) | ||
| method <- message$method | ||
| if (!is.null(method)) { | ||
| logger$info("method: ", method) | ||
| } | ||
| if (inherits(message, "Request") && !is.null(callback)) { | ||
| id <- message$id | ||
| self$response_handlers$set(as.character(id), callback) | ||
| } | ||
| } | ||
| }, | ||
|
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| request = function(method, params) { | ||
| Request$new( | ||
| self$get_ticket(), | ||
| method, | ||
| params | ||
| ) | ||
| }, | ||
|
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| check_connection = function() { | ||
| if (!self$process$is_alive()) | ||
| stop("Server is dead.") | ||
| }, | ||
|
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| read_header = function() { | ||
| if (!self$process$is_alive() || self$process$poll_io(1)[1] != "ready") return(NULL) | ||
| header <- self$process$read_output_lines(1) | ||
| if (length(header) == 0 || nchar(header) == 0) return(NULL) | ||
|
|
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| logger$info("received: ", header) | ||
| matches <- stringr::str_match(header, "Content-Length: ([0-9]+)") | ||
| if (is.na(matches[2])) | ||
| stop("Unexpected input: ", header) | ||
| as.integer(matches[2]) | ||
| }, | ||
|
|
||
| read_content = function(nbytes) { | ||
| empty_line <- self$process$read_output_lines(1) | ||
| while (length(empty_line) == 0) { | ||
| empty_line <- self$process$read_output_lines(1) | ||
| Sys.sleep(0.01) | ||
| } | ||
| if (nchar(empty_line) > 0) | ||
| stop("Unexpected non-empty line") | ||
| data <- "" | ||
| while (nbytes > 0) { | ||
| newdata <- self$process$read_output(nbytes) | ||
| if (length(newdata) > 0) { | ||
| nbytes <- nbytes - nchar(newdata, type = "bytes") | ||
| data <- paste0(data, newdata) | ||
| } | ||
| Sys.sleep(0.01) | ||
| } | ||
| data | ||
| }, | ||
|
|
||
| fetch = function(blocking = FALSE) { | ||
| nbytes <- self$read_header() | ||
| if (is.null(nbytes)) { | ||
| if (!blocking) { | ||
| return(NULL) | ||
| } else { | ||
| while (is.null(nbytes)) { | ||
| Sys.sleep(0.1) | ||
| nbytes <- self$read_header() | ||
| } | ||
| } | ||
| } | ||
|
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| data <- self$read_content(nbytes) | ||
| data | ||
| }, | ||
|
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| handle_raw = function(data) { | ||
| payload <- tryCatch( | ||
| jsonlite::fromJSON(data, simplifyVector = FALSE), | ||
| error = function(e) e) | ||
| if (inherits(payload, "error")) { | ||
| logger$error("error handling json: ", payload) | ||
| return(NULL) | ||
| } | ||
| pl_names <- names(payload) | ||
| logger$info("received payload.") | ||
|
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||
| if ("result" %in% pl_names) { | ||
| self$handle_response(payload) | ||
| } else { | ||
| logger$error("got unexpected message") | ||
| } | ||
| }, | ||
|
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| handle_response = function(response) { | ||
| id <- response$id | ||
| callback <- self$response_handlers$pop(as.character(id)) | ||
| if ("error" %in% names(response)) { | ||
| logger$info("got an error: ", response$error) | ||
| } else { | ||
| tryCatch( | ||
| callback(self, response$result), | ||
| error = function(e) logger$info("callback error: ", e)) | ||
| } | ||
| }, | ||
|
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||
| welcome = function() { | ||
| self$deliver( | ||
| self$request( | ||
| "initialize", | ||
| list( | ||
| rootUri = self$rootUri, | ||
| capabilities = self$ClientCapabilities | ||
| ) | ||
| ), | ||
| callback = function(self, result) { | ||
| self$ServerCapabilities <- result$capabilities | ||
| } | ||
| ) | ||
| }, | ||
|
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| start = function(working_dir = getwd(), capabilities = NULL) { | ||
| self$rootUri <- path_to_uri(working_dir) | ||
| self$ClientCapabilities <- capabilities | ||
| self$welcome() | ||
| }, | ||
|
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| stop = function() { | ||
| self$process$kill() | ||
| self$response_handlers <- NULL | ||
| } | ||
| ) | ||
| ) | ||
|
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|
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| LanguageClient$set("public", "register_handlers", function() { | ||
| self$request_handlers <- list() | ||
| self$notification_handlers <- list() | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| Package: languageserver | ||
| Title: What the Package Does (One Line, Title Case) | ||
| Version: 0.0.0.9000 | ||
| Authors@R: | ||
| person(given = "First", | ||
| family = "Last", | ||
| role = c("aut", "cre"), | ||
| email = "first.last@example.com") | ||
| Description: What the package does (one paragraph). | ||
| License: What license it uses | ||
| Encoding: UTF-8 | ||
| LazyData: true |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,2 @@ | ||
| # Generated by roxygen2: fake comment so roxygen2 overwrites silently. | ||
| exportPattern("^[^\\.]") |
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| @@ -0,0 +1,3 @@ | ||
| nothing <- function(x, y) { | ||
| NULL | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,19 @@ | ||
| exec <- if (.Platform$OS.type == "windows") "Rterm" else "R" | ||
| bin <- file.path(R.home("bin"), exec) | ||
|
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| wd <- system.file("projects", "mypackage", package = "languageserver") | ||
|
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| # languageserver:::logger$debug_mode(TRUE) | ||
|
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| client <- languageserver:::LanguageClient$new( | ||
| bin, c("--slave", "-e", "languageserver::run()")) | ||
|
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| client$start(working_dir = wd) | ||
| data <- client$fetch(blocking = TRUE) | ||
| client$handle_raw(data) | ||
|
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| context("Test STDIO connection") | ||
|
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| test_that("initialize", { | ||
| expect_false(is.null(client$ServerCapabilities)) | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| get_free_port <- function(port = 6000) { | ||
| while (TRUE) { | ||
| p <- callr::r_bg( | ||
| function(port) { | ||
| inherits(try( | ||
| socketConnection(port = port, server = TRUE), silent = TRUE), | ||
| "connection") | ||
| }, | ||
| list(port = port)) | ||
| q <- callr::r_bg( | ||
| function(port) { | ||
| Sys.sleep(0.1) | ||
| inherits(try( | ||
| socketConnection(port = port, server = FALSE), silent = TRUE), | ||
| "connection") | ||
| }, | ||
| list(port = port)) | ||
| q$wait() | ||
| p$wait() | ||
| if (q$get_result() && p$get_result()) { | ||
| return(port) | ||
| } else { | ||
| port <- port + 1 | ||
| } | ||
| } | ||
| } |