[BK-2020-03.git] / user / mw_wc2sp.sh

#!/bin/bash
# Desc: Convert wikicode to subpages
# Usage: mw_wc2sp.sh [path file]
# Input:  arg1  path  input wikicode file
# Output: files       wikicode file tree
# Depends: Bash 5.1.16, GNU Coreutils 8.32
# Version: 0.0.1

re_sp='^(<!-- @subpage:)(.*)([ ]*-->)$'; # subpage marker pattern
d_out=./wikicode/; # default output dir
f_spl="subpage_list.txt";
p_spl="${d_out}/${f_spl}";
f_splv="subpage_list_validated.txt";
p_splv="${d_out}/${f_splv}";

yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
get_path_fork_level() {
    # Desc: Get fork level from two paths
    # Input:  arg1    str  path
    #         arg2    str  path
    # Output: stdout  int  fork level
    # Version: 0.0.1
    local path1="$1";
    local path2="$2";

    # Squeeze multiple slashes and remove trailing slashes
    path1="$(echo "$path1" | tr -s '/' | sed 's:/*$::' )";
    path2="$(echo "$path2" | tr -s '/' | sed 's:/*$::' )";
    
    # Check for mixed absolute/relative paths
    if [[ "$path1" =~ ^/ ]] && [[ "$path2" =~ ^/ ]]; then
        flag_root=true;
        # Remove initial /
        path1="$(echo "$path1" | sed -e 's:^/::' )";
        path2="$(echo "$path2" | sed -e 's:^/::' )";
    elif [[ ! "$path1" =~ ^/ ]] && [[ ! "$path2" =~ ^/ ]]; then
        flag_root=false;
    else
        declare -p path1 path2 flag_root;
        echo "FATAL:Mixed relative and absolute paths not supported." 1>&2;
        return 1;
    fi;

    # Save path as arrays with `/` as element delimiter
    local IFS='/';
    read -ra parts1 <<< "$path1";
    read -ra parts2 <<< "$path2";

    # Get fork level by counting identical path elements from rootside
    local fork_level=0;
    for (( i=0; i<${#parts1[@]} && i<${#parts2[@]}; i++ )); do
        if [[ "${parts1[i]}" != "${parts2[i]}" ]]; then break; fi;
        ((fork_level++));
    done;
    
    echo "$fork_level";
    #declare -p path1 path2 flag_root parts1 parts2 fork_level; # debug
    return 0;
}; # Get fork level int from two paths
prune_path_rootside() {
    # Desc: Prunes a path from the root-side to a specified prune level.
    # Input: arg1  str  path
    #        arg2  int  prune level (0-indexed)
    # Depends: GNU sed 4.8
    # Version: 0.0.1
    local path="$1";
    local prune_level="$2";

    # Check for absolute or relative path
    if [[ "$path" =~ ^/ ]]; then
        flag_root=true;
        # Remove initial /
        path="$(echo "$path" | sed -e 's:^/::' )";
    else
        flag_root=false;
    fi;
    
    # Save path as array with `/` as element delimiter
    local IFS='/';
    read -ra parts <<< "$path";

    # Assemble pruned path from prune_level
    local pruned_path="";
    for (( i=prune_level; i<${#parts[@]}; i++ )); do
        pruned_path+="${parts[i]}/";
    done;

    # Trim trailing `/` delimiter
    pruned_path=$(echo "$pruned_path" | sed 's:/*$::');

    # Restore initial / if appropriate
    if [[ "$flag_root" == "true" ]] && [[ "$prune_level" -eq 0 ]]; then
        pruned_path=/"$pruned_path";
    fi;

    # Output pruned path
    echo "$pruned_path";
    #declare -p path prune_level parts pruned_path && printf "========\n"; # debug
    return 0;
}; # prune path rootside to int specified level
get_path_hierarchy_level() {
    # Desc: Outputs hierarchy level of input paths
    # Example: $ cat lines.txt | get_path_hierarchy_level
    # Input: stdin    str  lines with /-delimited paths
    # Output: stdout  int  hierarchy level of each path
    # Version: 0.0.1

    local line level;
    local flag_root;
    local -a output;

    n=0;
    while read -r line; do
        # Check for mixed absolute/relative paths.
        if [[ $n -le 0 ]] && [[ "$line" =~ ^/ ]]; then
            flag_root=true;
        else
            flag_root=false;
        fi;
        if { [[ "$flag_root" == "true" ]] && [[ ! "$line" =~ ^/ ]]; } || \
           { [[ "$flag_root" == "false" ]] && [[ "$line" =~ ^/ ]]; } then
            echo "FATAL:Mixed relative and absolute paths not supported." 1>&2; return 1;
        fi;
        
        # Squeeze multiple slashes and remove trailing slashes
        line="$(echo "$line" | tr -s '/' | sed 's:/*$::' )";

        # Count the number of slashes to determine hierarchy level
        level="$(echo "$line" | awk -F'/' '{print NF-1}' )";
        if [[ "$flag_root" == "true" ]]; then ((level--)); fi;

        # Append to output
        output+=("$level");
        #declare -p flag_root level; # debug
        ((n++));
    done;
    # Print output
    printf "%s\n" "${output[@]}";
}; # return hierarchy level of lines as integers
validate_subpage_list() {
    # Desc: Check for illegal characters in subpage titles
    # Input:  stdin   unvalidated subpage list
    # Output: stdout  validated subpage list
    # Depends: BK-2020-03 read_stdin(), yell(), die()
    #          GNU sed v4.8
    while read -r line; do

        # Reject chars illegal in Mediawiki page titles.
        re_illegal='[][><|}{#_]'; #  match illegal page names chars #, <, >, [, ], _, {, |, }
        if [[ "$line" =~ $re_illegal ]]; then
            die "FATAL:Illegal char. Not allowed: #, <, >, [, ], _, {, |, }:$line";
        fi;

        # Reject trailing spaces.
        re_ts=' $';  # match trailing space
        if [[ "$line" =~ $re_ts ]]; then
            die "FATAL:Trailing spaces not allowed:$line";
        fi;

        # Replace some chars with HTML-style codes
        ## replace ampersand    & with &#38  # must be first
        ## replace double quote " with &#34
        ## replace single quote ' with &#39
        line="$(sed \
                  -e 's/&/\&#38;/g' \
                  -e 's/"/\&#34;/g' \
                  -e "s/'/\&#39;/g" \
                  <<< "$line" )" || { echo "FATAL:Error running sed."; };
        printf "%s\n" "$line";
    done || {
        echo "FATAL:Error reading stdin." 1>&2; return 1; };
};
check_input() {
    local path_in="$1";
    if [[ ! -f "$path_in" ]]; then die "FATAL:Not a file path:$1"; fi;
}; # check input
assemble_subpage_ftree() {
    # Desc: Identify subpage markers in input wikicode file to create
    #   subpage list and subpage content files
    # Input: var  fp_in  path   input file
    #        var  re_sp  regex  for identifying subpage markers
    #        var  d_out  path   directory for output
    #        var  p_spl  path   subpage list file
    #declare -p re_sp d_out f_spl p_spl fp_in; # debug

    yell "STATUS:Running assemble_subpage_ftree()."; # debug

    spc_path="${d_out}/presubpage.content"; # default destination for content before subpage detected
    
    ## Process input line-by-line
    while read -r line; do
        #declare -p line re_sp; # debug
        ### Check for subpage marker
        if [[ "$line" =~ $re_sp ]]; then
            #### Identify new subpage path
            sp_path="$(echo "$line" | sed -E -e "s/${re_sp}/\2/" -e 's/[ ]*$//'; )";
            # declare -p sp_path; # debug
            #### Update subpage content file path
            spc_path="${d_out}/${sp_path}.content";
            spc_dir="$(dirname "$spc_path"; )";
            #declare -p spc_path spc_dir; # debug
            #### Prepare file destination
            if [[ ! -d "$spc_dir" ]]; then
                must mkdir -p "$spc_dir" && \
                    yell "STATUS:Created dir:${spc_dir}";
            fi;
            if [[ -f "$spc_path" ]]; then
                die "FATAL:File already exists:${spc_path}";
            else
                must touch "$spc_path";
            fi;
            #### Append subpage path to subpage list
            printf "%s\n" "$sp_path" >> "$p_spl";
        fi;
        ### Write subpage content
        must printf "%s\n" "$line" >> "$spc_path";
    done < "${fp_in}";

    yell "STATUS:Finished assemble_subpage_ftree()."; # debug
}; # process input wikicode into subpage content files and subpage list
create_output_wikicode() {
    # Desc: Use subpage list and subpage content files to create
    #   output subpage wikicode.
    # Input: var    p_spl   path   subpage list file
    #        var    p_splv  path   subpage list file (validated)
    #        file   ${p_spl}       subpage list file
    #        file   ${p_splv}      subpage list file (validated)
    #        var    d_out   path   directory for output
    # Depends: get_path_fork_level()
    #          prune_path_rootside()
    #          get_path_hierarchy_level()
    #          validate_subpage_list()
    # Output: files  subpages in $d_out

    yell "Running create_output_wikicode()."; # debug

    # Read subpage list files into arrays.
    local -a lines_spl lines_splv;
    mapfile -t lines_spl < "$p_spl";
    mapfile -t lines_splv < "$p_splv";
    ## Add extra blank lines for couple line comparisons
    lines_spl+=(''); 
    lines_splv+=('');
    declare -p lines_spl; # debug
    
    # Check that subpage list files have same line counts
    lc_spl="${#lines_spl[@]}";
    lc_splv="${#lines_splv[@]}";
    if [[ ! "$lc_spl" -eq "$lc_splv" ]]; then
        die "FATAL:Different line counts for subpage lists:$(declare -p lc_spl lc_splv;)";
    fi;
    declare -p lc_spl lc_splv; # debug
    
    # Read content files according to subpage list file    
    #   Note: $i corresponds to “next” line ($lnext). Therefore, use
    #   $((i-1)) to access the “current” ($lcurr) line. This offset is
    #   because subpage list lines are compared using lagging line
    #   comparison.    
    for i in "${!lines_spl[@]}"; do
        declare -p i; # debug;
        
        # Check subpage content files
        f_spc="${lines_spl[i-1]}.content"; 
        p_spc="${d_out}/${f_spc}";
        declare -p f_spc p_spc;
        ## Exit if subpage content file missing
        if [[ "$i" -gt 0 ]] && [[ ! -f "$p_spc" ]]; then
            die "FATAL:Subpage content file missing:$p_spc"; fi;

        # Prepare output subpage wikicode files
        f_spwc="${lines_splv[i-1]}.wc";
        p_spwc="${d_out}/${f_spwc}"; # use validated subpage name
        declare -p f_spwc p_spwc; # debug
        if [[ "$i" -gt 0 ]]; then must touch "$p_spwc"; fi;

        # Advance input lines
        lprev="$lcurr";
        lcurr="$lnext";
        lnext="${lines_splv[i]}";
        declare -p lprev lcurr lnext;  # debug

        # Update hierarchy tracker states
        lprev_hier="$lcurr_hier";
        lcurr_hier="$lnext_hier";
        lnext_hier="$(echo "$lnext" | get_path_hierarchy_level)";

        # Skip first iteration
        if [[ "$i" -eq 0 ]]; then
            yell "$i:DEBUG:Skipping first iteration.";  # debug
            printf -- "----\n" 1>&2;  # debug
            continue; fi;

        # Get path fork levels
        fork_level_next="$(get_path_fork_level "$lcurr" "$lnext")";
        fork_level_prev="$(get_path_fork_level "$lcurr" "$lprev")";

        # Count relative ups needed (`../`)
        relups_next="$((lcurr_hier - fork_level_next + 1))";
        relups_prev="$((lcurr_hier - fork_level_prev + 1))";

        # Initialize Next and Prev links with relative ups to fork.
        link_next="";
        for (( j=0; j<relups_next; j++ )); do link_next+="../"; done;
        if [[ "$relups_next" -eq 0 ]]; then link_next+="/"; fi; # handle new subpage path dive
        link_prev="";
        for (( j=0; j<relups_prev; j++ )); do link_prev+="../"; done;

        # Append branchs from fork to Next and Prev targets
        link_next+="$(prune_path_rootside "$lnext" "$fork_level_next")";
        link_prev+="$(prune_path_rootside "$lprev" "$fork_level_prev")";

        # Print navigation link wikicode
        if [[ -z "$lprev" ]]; then
            printf "[[%s|Next]], [[../|Up]]\n" "$link_next" >> "$p_spwc";
        elif [[ -n "$lnext" ]]; then
            printf "[[%s|Next]], [[%s|Previous]], [[../|Up]]\n" "$link_next" "$link_prev" >> "$p_spwc";
        elif [[ -z "$lnext" ]]; then
            printf "[[%s|Previous]], [[../|Up]]\n" "$link_prev" >> "$p_spwc";
        else
            yell "FATAL:Here be dragons.";
        fi;

        # Print subpage content
        printf -- "\n----<onlyinclude>\n" >> "$p_spwc";
        cat "$p_spc" >> "$p_spwc";
        printf -- "\n</onlyinclude>----\n" >> "$p_spwc";
        printf -- "\n==References==\n<references />\n" >> "$p_spwc";
        printf -- "\n==Footnotes==\n<references group=fn />\n" >> "$p_spwc";
        printf -- "\n==Comments==\n<references group=cmt />\n" >> "$p_spwc";
        printf -- "\n"; >> "$p_spwc";

        declare -p i lprev lcurr lnext lprev_hier lcurr_hier lnext_hier; # debug
        declare -p fork_level_next fork_level_prev relups_next relups_prev; # debug
        declare -p link_next link_prev; # debug
        printf "====================\n" # debug
    done;

    yell "STATUS:Finished create_output_wikicode()."; # debug
}; # generate output subpage wikicode
main() {
    check_input "$@";
    declare -g fp_in="$1"; # input file path
    assemble_subpage_ftree;
    validate_subpage_list < "$p_spl" > "$p_splv";
    create_output_wikicode;
}; # main program

main "$@";

# Author: Steven Baltakatei Sandoval
# License: GPLv3+


# Example input:
# ```
# <!-- @subpage:Introduction -->
# This is an introducton.
# <!-- @subpage:Foreword -->
# This is a foreword.

# <!-- @subpage:Part 1/Chapter 1 -->
# Blah.
# <!-- @subpage:Part 1/Chapter 2 -->
# Blah.
# <!-- @subpage:Part 1/Chapter 2/Section A -->
# Blabbity blah.
# <!-- @subpage:Part 2/ -->
# Blah.
# <!-- @subpage:Part 2/Chapter 1 -->
# More blah.
# ```
Commit	Line	Data
fea1bafc SBS	1	#!/bin/bash
	2	# Desc: Convert wikicode to subpages
	3	# Usage: mw_wc2sp.sh [path file]
	4	# Input: arg1 path input wikicode file
	5	# Output: files wikicode file tree
	6	# Depends: Bash 5.1.16, GNU Coreutils 8.32
	7	# Version: 0.0.1
	8
	9	re_sp='^(<!-- @subpage:)(.)([ ]-->)$'; # subpage marker pattern
	10	d_out=./wikicode/; # default output dir
	11	f_spl="subpage_list.txt";
	12	p_spl="${d_out}/${f_spl}";
	13	f_splv="subpage_list_validated.txt";
	14	p_splv="${d_out}/${f_splv}";
	15
	16	yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
	17	die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
	18	must() { "$@" \|\| die "cannot $*"; } # runs args as command, reports args if command fails
	19	get_path_fork_level() {
	20	# Desc: Get fork level from two paths
	21	# Input: arg1 str path
	22	# arg2 str path
	23	# Output: stdout int fork level
	24	# Version: 0.0.1
	25	local path1="$1";
	26	local path2="$2";
	27
	28	# Squeeze multiple slashes and remove trailing slashes
	29	path1="$(echo "$path1" \| tr -s '/' \| sed 's:/*$::' )";
	30	path2="$(echo "$path2" \| tr -s '/' \| sed 's:/*$::' )";
	31
	32	# Check for mixed absolute/relative paths
	33	if [[ "$path1" =~ ^/ ]] && [[ "$path2" =~ ^/ ]]; then
	34	flag_root=true;
	35	# Remove initial /
	36	path1="$(echo "$path1" \| sed -e 's:^/::' )";
	37	path2="$(echo "$path2" \| sed -e 's:^/::' )";
	38	elif [[ ! "$path1" =~ ^/ ]] && [[ ! "$path2" =~ ^/ ]]; then
	39	flag_root=false;
	40	else
	41	declare -p path1 path2 flag_root;
	42	echo "FATAL:Mixed relative and absolute paths not supported." 1>&2;
	43	return 1;
	44	fi;
	45
	46	# Save path as arrays with `/` as element delimiter
	47	local IFS='/';
	48	read -ra parts1 <<< "$path1";
	49	read -ra parts2 <<< "$path2";
	50
	51	# Get fork level by counting identical path elements from rootside
	52	local fork_level=0;
	53	for (( i=0; i<${#parts1[@]} && i<${#parts2[@]}; i++ )); do
	54	if [[ "${parts1[i]}" != "${parts2[i]}" ]]; then break; fi;
	55	((fork_level++));
	56	done;
	57
	58	echo "$fork_level";
	59	#declare -p path1 path2 flag_root parts1 parts2 fork_level; # debug
	60	return 0;
	61	}; # Get fork level int from two paths
	62	prune_path_rootside() {
	63	# Desc: Prunes a path from the root-side to a specified prune level.
	64	# Input: arg1 str path
65	# arg2 int prune level (0-indexed)
66	# Depends: GNU sed 4.8
67	# Version: 0.0.1
68	local path="$1";
69	local prune_level="$2";
70
71	# Check for absolute or relative path
72	if [[ "$path" =~ ^/ ]]; then
73	flag_root=true;
74	# Remove initial /
75	path="$(echo "$path" \| sed -e 's:^/::' )";
76	else
77	flag_root=false;
78	fi;
79
80	# Save path as array with `/` as element delimiter
81	local IFS='/';
82	read -ra parts <<< "$path";
83
84	# Assemble pruned path from prune_level
85	local pruned_path="";
86	for (( i=prune_level; i<${#parts[@]}; i++ )); do
87	pruned_path+="${parts[i]}/";
88	done;
89
90	# Trim trailing `/` delimiter
91	pruned_path=$(echo "$pruned_path" \| sed 's:/*$::');
92
93	# Restore initial / if appropriate
94	if [[ "$flag_root" == "true" ]] && [[ "$prune_level" -eq 0 ]]; then
95	pruned_path=/"$pruned_path";
96	fi;
97
98	# Output pruned path
99	echo "$pruned_path";
100	#declare -p path prune_level parts pruned_path && printf "========\n"; # debug
101	return 0;
102	}; # prune path rootside to int specified level
103	get_path_hierarchy_level() {
104	# Desc: Outputs hierarchy level of input paths
105	# Example: $ cat lines.txt \| get_path_hierarchy_level
106	# Input: stdin str lines with /-delimited paths
107	# Output: stdout int hierarchy level of each path
108	# Version: 0.0.1
109
110	local line level;
111	local flag_root;
112	local -a output;
113
114	n=0;
115	while read -r line; do
116	# Check for mixed absolute/relative paths.
117	if [[ $n -le 0 ]] && [[ "$line" =~ ^/ ]]; then
118	flag_root=true;
119	else
120	flag_root=false;
121	fi;
122	if { [[ "$flag_root" == "true" ]] && [[ ! "$line" =~ ^/ ]]; } \|\| \
123	{ [[ "$flag_root" == "false" ]] && [[ "$line" =~ ^/ ]]; } then
124	echo "FATAL:Mixed relative and absolute paths not supported." 1>&2; return 1;
125	fi;
126
127	# Squeeze multiple slashes and remove trailing slashes
128	line="$(echo "$line" \| tr -s '/' \| sed 's:/*$::' )";
129
130	# Count the number of slashes to determine hierarchy level
131	level="$(echo "$line" \| awk -F'/' '{print NF-1}' )";
132	if [[ "$flag_root" == "true" ]]; then ((level--)); fi;
133
134	# Append to output
135	output+=("$level");
136	#declare -p flag_root level; # debug
137	((n++));
138	done;
139	# Print output
140	printf "%s\n" "${output[@]}";
141	}; # return hierarchy level of lines as integers
142	validate_subpage_list() {
143	# Desc: Check for illegal characters in subpage titles
144	# Input: stdin unvalidated subpage list
145	# Output: stdout validated subpage list
146	# Depends: BK-2020-03 read_stdin(), yell(), die()
147	# GNU sed v4.8
148	while read -r line; do
149
150	# Reject chars illegal in Mediawiki page titles.
151	re_illegal='[][><\|}{#_]'; # match illegal page names chars #, <, >, [, ], _, {, \|, }
152	if [[ "$line" =~ $re_illegal ]]; then
153	die "FATAL:Illegal char. Not allowed: #, <, >, [, ], _, {, \|, }:$line";
154	fi;
155
156	# Reject trailing spaces.
157	re_ts=' $'; # match trailing space
158	if [[ "$line" =~ $re_ts ]]; then
159	die "FATAL:Trailing spaces not allowed:$line";
160	fi;
161
162	# Replace some chars with HTML-style codes
163	## replace ampersand & with &#38 # must be first
164	## replace double quote " with &#34
165	## replace single quote ' with &#39
166	line="$(sed \
167	-e 's/&/\&/g' \
168	-e 's/"/\"/g' \
169	-e "s/'/\'/g" \
170	<<< "$line" )" \|\| { echo "FATAL:Error running sed."; };
171	printf "%s\n" "$line";
172	done \|\| {
173	echo "FATAL:Error reading stdin." 1>&2; return 1; };
174	};
175	check_input() {
176	local path_in="$1";
177	if [[ ! -f "$path_in" ]]; then die "FATAL:Not a file path:$1"; fi;
178	}; # check input
179	assemble_subpage_ftree() {
180	# Desc: Identify subpage markers in input wikicode file to create
181	# subpage list and subpage content files
182	# Input: var fp_in path input file
183	# var re_sp regex for identifying subpage markers
184	# var d_out path directory for output
185	# var p_spl path subpage list file
186	#declare -p re_sp d_out f_spl p_spl fp_in; # debug
187
188	yell "STATUS:Running assemble_subpage_ftree()."; # debug
189
190	spc_path="${d_out}/presubpage.content"; # default destination for content before subpage detected
191
192	## Process input line-by-line
193	while read -r line; do
194	#declare -p line re_sp; # debug
195	### Check for subpage marker
196	if [[ "$line" =~ $re_sp ]]; then
197	#### Identify new subpage path
198	sp_path="$(echo "$line" \| sed -E -e "s/${re_sp}/\2/" -e 's/[ ]*$//'; )";
199	# declare -p sp_path; # debug
200	#### Update subpage content file path
201	spc_path="${d_out}/${sp_path}.content";
202	spc_dir="$(dirname "$spc_path"; )";
203	#declare -p spc_path spc_dir; # debug
204	#### Prepare file destination
205	if [[ ! -d "$spc_dir" ]]; then
206	must mkdir -p "$spc_dir" && \
207	yell "STATUS:Created dir:${spc_dir}";
208	fi;
209	if [[ -f "$spc_path" ]]; then
210	die "FATAL:File already exists:${spc_path}";
211	else
212	must touch "$spc_path";
213	fi;
214	#### Append subpage path to subpage list
215	printf "%s\n" "$sp_path" >> "$p_spl";
216	fi;
217	### Write subpage content
218	must printf "%s\n" "$line" >> "$spc_path";
219	done < "${fp_in}";
220
221	yell "STATUS:Finished assemble_subpage_ftree()."; # debug
222	}; # process input wikicode into subpage content files and subpage list
223	create_output_wikicode() {
224	# Desc: Use subpage list and subpage content files to create
225	# output subpage wikicode.
226	# Input: var p_spl path subpage list file
227	# var p_splv path subpage list file (validated)
228	# file ${p_spl} subpage list file
229	# file ${p_splv} subpage list file (validated)
230	# var d_out path directory for output
231	# Depends: get_path_fork_level()
232	# prune_path_rootside()
233	# get_path_hierarchy_level()
234	# validate_subpage_list()
235	# Output: files subpages in $d_out
236
237	yell "Running create_output_wikicode()."; # debug
238
239	# Read subpage list files into arrays.
240	local -a lines_spl lines_splv;
241	mapfile -t lines_spl < "$p_spl";
242	mapfile -t lines_splv < "$p_splv";
243	## Add extra blank lines for couple line comparisons
244	lines_spl+=('');
245	lines_splv+=('');
246	declare -p lines_spl; # debug
247
248	# Check that subpage list files have same line counts
249	lc_spl="${#lines_spl[@]}";
250	lc_splv="${#lines_splv[@]}";
251	if [[ ! "$lc_spl" -eq "$lc_splv" ]]; then
252	die "FATAL:Different line counts for subpage lists:$(declare -p lc_spl lc_splv;)";
253	fi;
254	declare -p lc_spl lc_splv; # debug
255
256	# Read content files according to subpage list file
257	# Note: $i corresponds to “next” line ($lnext). Therefore, use
258	# $((i-1)) to access the “current” ($lcurr) line. This offset is
259	# because subpage list lines are compared using lagging line
260	# comparison.
261	for i in "${!lines_spl[@]}"; do
262	declare -p i; # debug;
263
264	# Check subpage content files
265	f_spc="${lines_spl[i-1]}.content";
266	p_spc="${d_out}/${f_spc}";
267	declare -p f_spc p_spc;
268	## Exit if subpage content file missing
269	if [[ "$i" -gt 0 ]] && [[ ! -f "$p_spc" ]]; then
270	die "FATAL:Subpage content file missing:$p_spc"; fi;
271
272	# Prepare output subpage wikicode files
273	f_spwc="${lines_splv[i-1]}.wc";
274	p_spwc="${d_out}/${f_spwc}"; # use validated subpage name
275	declare -p f_spwc p_spwc; # debug
276	if [[ "$i" -gt 0 ]]; then must touch "$p_spwc"; fi;
277
278	# Advance input lines
279	lprev="$lcurr";
280	lcurr="$lnext";
281	lnext="${lines_splv[i]}";
282	declare -p lprev lcurr lnext; # debug
283
284	# Update hierarchy tracker states
285	lprev_hier="$lcurr_hier";
286	lcurr_hier="$lnext_hier";
287	lnext_hier="$(echo "$lnext" \| get_path_hierarchy_level)";
288
289	# Skip first iteration
290	if [[ "$i" -eq 0 ]]; then
291	yell "$i:DEBUG:Skipping first iteration."; # debug
292	printf -- "----\n" 1>&2; # debug
293	continue; fi;
294
295	# Get path fork levels
296	fork_level_next="$(get_path_fork_level "$lcurr" "$lnext")";
297	fork_level_prev="$(get_path_fork_level "$lcurr" "$lprev")";
298
299	# Count relative ups needed (`../`)
300	relups_next="$((lcurr_hier - fork_level_next + 1))";
301	relups_prev="$((lcurr_hier - fork_level_prev + 1))";
302
303	# Initialize Next and Prev links with relative ups to fork.
304	link_next="";
305	for (( j=0; j<relups_next; j++ )); do link_next+="../"; done;
306	if [[ "$relups_next" -eq 0 ]]; then link_next+="/"; fi; # handle new subpage path dive
307	link_prev="";
308	for (( j=0; j<relups_prev; j++ )); do link_prev+="../"; done;
309
310	# Append branchs from fork to Next and Prev targets
311	link_next+="$(prune_path_rootside "$lnext" "$fork_level_next")";
312	link_prev+="$(prune_path_rootside "$lprev" "$fork_level_prev")";
313
314	# Print navigation link wikicode
315	if [[ -z "$lprev" ]]; then
316	printf "[[%s\|Next]], [[../\|Up]]\n" "$link_next" >> "$p_spwc";
317	elif [[ -n "$lnext" ]]; then
318	printf "[[%s\|Next]], [[%s\|Previous]], [[../\|Up]]\n" "$link_next" "$link_prev" >> "$p_spwc";
319	elif [[ -z "$lnext" ]]; then
320	printf "[[%s\|Previous]], [[../\|Up]]\n" "$link_prev" >> "$p_spwc";
321	else
322	yell "FATAL:Here be dragons.";
323	fi;
324
325	# Print subpage content
326	printf -- "\n----<onlyinclude>\n" >> "$p_spwc";
327	cat "$p_spc" >> "$p_spwc";
328	printf -- "\n</onlyinclude>----\n" >> "$p_spwc";
329	printf -- "\n==References==\n<references />\n" >> "$p_spwc";
330	printf -- "\n==Footnotes==\n<references group=fn />\n" >> "$p_spwc";
331	printf -- "\n==Comments==\n<references group=cmt />\n" >> "$p_spwc";
332	printf -- "\n"; >> "$p_spwc";
333
334	declare -p i lprev lcurr lnext lprev_hier lcurr_hier lnext_hier; # debug
335	declare -p fork_level_next fork_level_prev relups_next relups_prev; # debug
336	declare -p link_next link_prev; # debug
337	printf "====================\n" # debug
338	done;
339
340	yell "STATUS:Finished create_output_wikicode()."; # debug
341	}; # generate output subpage wikicode
342	main() {
343	check_input "$@";
344	declare -g fp_in="$1"; # input file path
345	assemble_subpage_ftree;
346	validate_subpage_list < "$p_spl" > "$p_splv";
347	create_output_wikicode;
348	}; # main program
349
350	main "$@";
351
352	# Author: Steven Baltakatei Sandoval
353	# License: GPLv3+
354
355
356	# Example input:
357	# ```
358	# <!-- @subpage:Introduction -->
359	# This is an introducton.
360	# <!-- @subpage:Foreword -->
361	# This is a foreword.
362
363	# <!-- @subpage:Part 1/Chapter 1 -->
364	# Blah.
365	# <!-- @subpage:Part 1/Chapter 2 -->
366	# Blah.
367	# <!-- @subpage:Part 1/Chapter 2/Section A -->
368	# Blabbity blah.
369	# <!-- @subpage:Part 2/ -->
370	# Blah.
371	# <!-- @subpage:Part 2/Chapter 1 -->
372	# More blah.
373	# ```