Glossed document by phonfieldwork [Moroz 2020]
In phonfieldwork: Linguistic Phonetic Fieldwork Tools

df <- read.csv(params$data, stringsAsFactors = FALSE)

all_rows <- c("cf", "hn", "gls", "msa")

library(dplyr, warn.conflicts = FALSE)
library(tidyr, warn.conflicts = FALSE)

if(is.null(example_pkg)){
  df %>%
    group_by(text_title, p_id, s_id, free_trans, w_id) %>%
    summarise(txt = paste0(txt, collapse = ""),
              cf = paste0(cf, collapse = "-"),
              hn = paste0(hn, collapse = "-"),
              msa = paste0(msa, collapse = "-"),
              gls = paste0(gls, collapse = "-")) %>% 
    mutate(cf = gsub("-=", "=", cf),
           hn = gsub("-=", "=", hn),
           msa = gsub("-=", "=", msa),
           gls = gsub("-=", "=", gls)) %>% 
    group_by(text_title, p_id, s_id, free_trans) %>%
    summarise(txt = paste0(txt, collapse = "&#x09;"),
              cf = paste0(cf, collapse = "&#x09;"),
              hn = paste0(hn, collapse = "&#x09;"),
              msa = paste0(msa, collapse = "&#x09;"),
              gls = paste0(gls, collapse = "&#x09;")) %>% 
    mutate(txt = paste0(s_id, "\\.&#x09;", txt, "\n\n&#x09;"),
           cf = paste0(cf, "\n\n&#x09;"),
           hn = paste0(hn, "\n\n&#x09;"),
           msa = paste0(msa, "\n\n&#x09;"),
           gls = paste0(gls, "\n\n&#x09;"),
           free_trans = paste0(free_trans, "\n\n")) %>% 
    select(text_title, p_id, s_id, txt, cf, hn, msa, gls, free_trans) %>% 
    ungroup() %>% 
    add_row(tibble(text_title = unique(.$text_title),
                   p_id = 0,
                   s_id = 0,
                   txt = paste0("\n\n## ", unique(.$text_title), "\n\n"),
                   cf = NA,
                   hn = NA,
                   msa = NA,
                   gls = NA,
                   free_trans = NA), .before = 1)  %>% 
    arrange(text_title, p_id, s_id) %>% 
    select(-c(all_rows[!(all_rows %in% params$rows)])) %>% 
    pivot_longer(names_to = "type", values_to = "value", cols = c("txt", params$rows, "free_trans")) %>% 
    na.omit() %>% 
    ungroup() %>% 
    select(value) %>% 
    unlist() %>% 
    unname() %>% 
    cat(sep = "")
} else if(example_pkg == "philex"){
  df %>%
    group_by(text_title, p_id, s_id, free_trans, w_id) %>%
    summarise(txt = paste0(txt, collapse = ""),
              cf = paste0(cf, collapse = "-"),
              hn = paste0(hn, collapse = "-"),
              msa = paste0(msa, collapse = "-"),
              gls = paste0(gls, collapse = "-")) %>% 
    mutate(cf = gsub("-=", "=", cf),
           hn = gsub("-=", "=", hn),
           msa = gsub("-=", "=", msa),
           gls = gsub("-=", "=", gls)) %>%
    group_by(text_title, p_id, s_id, free_trans) %>%
    summarise(txt = paste0(txt, collapse = " "),
              cf = paste0(cf, collapse = " "),
              hn = paste0(hn, collapse = " "),
              msa = paste0(msa, collapse = " "),
              gls = paste0(gls, collapse = " ")) %>%
    mutate(txt = paste0("\\\\lb\\{ex:", s_id, "\\}\\{\\\\gll ", txt, "\\\\\\\\\n\n&#x09;"),
           cf = paste0(cf, "\\\\\\\\\n\n&#x09;"),
           hn = paste0(hn, "\\\\\\\\\n\n&#x09;"),
           msa = paste0(msa, "\\\\\\\\\n\n&#x09;"),
           gls = paste0(gls, "\\\\\\\\\n\n&#x09;"),
           free_trans = paste0("\\\\trans `", free_trans, "'\\}\n\n")) %>% 
    select(text_title, p_id, s_id, txt, cf, hn, msa, gls, free_trans) %>% 
    ungroup() %>% 
    add_row(tibble(text_title = unique(.$text_title),
                   p_id = 0,
                   s_id = 0,
                   txt = paste0("\n\n## ", unique(.$text_title), "\n\n"),
                   cf = NA,
                   hn = NA,
                   msa = NA,
                   gls = NA,
                   free_trans = NA), .before = 1)  %>% 
    arrange(text_title, p_id, s_id) %>% 
    select(-c(all_rows[!(all_rows %in% params$rows)])) %>%
    pivot_longer(names_to = "type", values_to = "value", cols = c("txt", params$rows, "free_trans")) %>%
    na.omit() %>% 
    ungroup() %>% 
    select(value) %>% 
    unlist() %>% 
    unname() %>% 
    cat(sep = "")
} else if(example_pkg == "gb4e"){
  # \begin{exe}
  # \ex\label{ex1}
  # \gll Den Fritz_1 habe ich \_\_{}_1 zum Essen eingeladen.\\
  # the fred have I {} {to the} eating invited.\\
  # \glt I invited Fred for dinner.
  # \end{exe}

  df %>%
    group_by(text_title, p_id, s_id, free_trans, w_id) %>%
    summarise(txt = paste0(txt, collapse = ""),
              cf = paste0(cf, collapse = "-"),
              hn = paste0(hn, collapse = "-"),
              msa = paste0(msa, collapse = "-"),
              gls = paste0(gls, collapse = "-")) %>% 
    mutate(cf = gsub("-=", "=", cf),
           hn = gsub("-=", "=", hn),
           msa = gsub("-=", "=", msa),
           gls = gsub("-=", "=", gls)) %>% 
    group_by(text_title, p_id, s_id, free_trans) %>%
    summarise(txt = paste0(txt, collapse = " "),
              cf = paste0(cf, collapse = " "),
              hn = paste0(hn, collapse = " "),
              msa = paste0(msa, collapse = " "),
              gls = paste0(gls, collapse = " ")) %>% 
    mutate(txt = paste0("\\\\begin\\{exe\\}\n\n",
                        "\\\\ex\\\\label\\{ex:", s_id, "\\}\n\n",
                        "\\\\gll ", txt, "\\\\\\\\\n\n&#x09;"),
           cf = paste0(cf, "\\\\\\\\\n\n&#x09;"),
           hn = paste0(hn, "\\\\\\\\\n\n&#x09;"),
           msa = paste0(msa, "\\\\\\\\\n\n&#x09;"),
           gls = paste0(gls, "\\\\\\\\\n\n&#x09;"),
           free_trans = paste0("\\\\glt `", free_trans, "'\n\n",
                               "\\\\end\\{exe\\}\n\n")) %>% 
    select(text_title, p_id, s_id, txt, cf, hn, msa, gls, free_trans) %>% 
    ungroup() %>% 
    add_row(tibble(text_title = unique(.$text_title),
                   p_id = 0,
                   s_id = 0,
                   txt = paste0("\n\n## ", unique(.$text_title), "\n\n"),
                   cf = NA,
                   hn = NA,
                   msa = NA,
                   gls = NA,
                   free_trans = NA), .before = 1)  %>% 
    arrange(text_title, p_id, s_id) %>% 
    select(-c(all_rows[!(all_rows %in% params$rows)])) %>% 
    pivot_longer(names_to = "type", values_to = "value", cols = c("txt", params$rows, "free_trans")) %>% 
    na.omit() %>% 
    ungroup() %>% 
    select(value) %>% 
    unlist() %>% 
    unname() %>% 
    cat(sep = "")
} else if(example_pkg == "langsci"){
  # \ea\label{ex:examplelabel}
  # \langinfo{French}{Indo-European}{personal knowledge}\\
  # \gll Jean aim-e
  # Marie \\
  # John love-\textsc{3s.pres.ind} Mary \\
  # \glt ‘John loves Mary.’
  # \z

  df %>%
    group_by(text_title, p_id, s_id, free_trans, w_id) %>%
    summarise(txt = paste0(txt, collapse = ""),
              cf = paste0(cf, collapse = "-"),
              hn = paste0(hn, collapse = "-"),
              msa = paste0(msa, collapse = "-"),
              gls = paste0(gls, collapse = "-")) %>% 
    mutate(cf = gsub("-=", "=", cf),
           hn = gsub("-=", "=", hn),
           msa = gsub("-=", "=", msa),
           gls = gsub("-=", "=", gls)) %>% 
    group_by(text_title, p_id, s_id, free_trans) %>%
    summarise(txt = paste0(txt, collapse = " "),
              cf = paste0(cf, collapse = " "),
              hn = paste0(hn, collapse = " "),
              msa = paste0(msa, collapse = " "),
              gls = paste0(gls, collapse = " ")) %>% 
    mutate(txt = paste0("\\\\ea\\\\label\\{ex:", s_id, "\\}\n\n",
                        "\\\\gll ", txt, "\\\\\\\\\n\n&#x09;"),
           cf = paste0(cf, "\\\\\\\\\n\n&#x09;"),
           hn = paste0(hn, "\\\\\\\\\n\n&#x09;"),
           msa = paste0(msa, "\\\\\\\\\n\n&#x09;"),
           gls = paste0(gls, "\\\\\\\\\n\n&#x09;"),
           free_trans = paste0("\\\\glt `", free_trans, "'\n\n",
                               "\\\\z\n\n")) %>% 
    select(text_title, p_id, s_id, txt, cf, hn, msa, gls, free_trans) %>% 
    ungroup() %>% 
    add_row(tibble(text_title = unique(.$text_title),
                   p_id = 0,
                   s_id = 0,
                   txt = paste0("\n\n## ", unique(.$text_title), "\n\n"),
                   cf = NA,
                   hn = NA,
                   msa = NA,
                   gls = NA,
                   free_trans = NA), .before = 1)  %>% 
    arrange(text_title, p_id, s_id) %>% 
    select(-c(all_rows[!(all_rows %in% params$rows)])) %>% 
    pivot_longer(names_to = "type", values_to = "value", cols = c("txt", params$rows, "free_trans")) %>% 
    na.omit() %>% 
    ungroup() %>% 
    select(value) %>% 
    unlist() %>% 
    unname() %>% 
    cat(sep = "")  

} else if(example_pkg == "expex"){
  # \ex\label{ex:exmaple1}\begingl
  # \gla k- wapm -a -s’i -m -wapunin -uk //
  # \glb CL V AGR NEG AGR TNS AGR //
  # \glb 2 see {\sc 3acc} {} {\sc 2pl} preterit {\sc 3pl} //
  # \glft ‘you (pl) didn’t see them’//
  # \endgl  \xe

  df %>%
    group_by(text_title, p_id, s_id, free_trans, w_id) %>%
    summarise(txt = paste0(txt, collapse = ""),
              cf = paste0(cf, collapse = "-"),
              hn = paste0(hn, collapse = "-"),
              msa = paste0(msa, collapse = "-"),
              gls = paste0(gls, collapse = "-")) %>% 
    mutate(cf = gsub("-=", "=", cf),
           hn = gsub("-=", "=", hn),
           msa = gsub("-=", "=", msa),
           gls = gsub("-=", "=", gls)) %>% 
    group_by(text_title, p_id, s_id, free_trans) %>%
    summarise(txt = paste0(txt, collapse = " "),
              cf = paste0(cf, collapse = " "),
              hn = paste0(hn, collapse = " "),
              msa = paste0(msa, collapse = " "),
              gls = paste0(gls, collapse = " ")) %>% 
    mutate(txt = paste0("\\\\ex\\\\label\\{ex:", s_id, "\\}//\begingl\n\n",
                        "\\\\gla ", txt, "//\n\n&#x09;"),
           cf = paste0("\\\\glb ", cf, "//\n\n&#x09;"),
           hn = paste0("\\\\glb ", hn, "//\n\n&#x09;"),
           msa = paste0("\\\\glb ", msa, "//\n\n&#x09;"),
           gls = paste0("\\\\glb ",gls, "//\n\n&#x09;"),
           free_trans = paste0("\\\\glft `", free_trans, "'//\n\n",
                               "\\\\endgl\\\\xe")) %>% 
    select(text_title, p_id, s_id, txt, cf, hn, msa, gls, free_trans) %>% 
    ungroup() %>% 
    add_row(tibble(text_title = unique(.$text_title),
                   p_id = 0,
                   s_id = 0,
                   txt = paste0("\n\n## ", unique(.$text_title), "\n\n"),
                   cf = NA,
                   hn = NA,
                   msa = NA,
                   gls = NA,
                   free_trans = NA), .before = 1)  %>% 
    arrange(text_title, p_id, s_id) %>% 
    select(-c(all_rows[!(all_rows %in% params$rows)])) %>% 
    pivot_longer(names_to = "type", values_to = "value", cols = c("txt", params$rows, "free_trans")) %>% 
    na.omit() %>% 
    ungroup() %>% 
    select(value) %>% 
    unlist() %>% 
    unname() %>% 
    cat(sep = "")  
}