Basic implementation for ls #1

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mschoi · 2025-02-13T13:41:25+09:00

mschoi commented

2025-02-13 13:41:25 +09:00

Parse arguments

tags: lhRtucr1mgodF, --full-time
path - should check path is directory or file.

Data structure

file type
permissions
number of hard links
owner
group
size
last-modified date-time
name
author

Output

list names wrt window width
colors

Flags

-a, --all do not ignore entries starting with .
-A, --almost-all do not list implied . and ..
--author with -l, print the author of each file
-b, --escape print C-style escapes for nongraphic characters
--block-size=SIZE with -l, scale sizes by SIZE when printing them; e.g., '--block-size=M'; see SIZE format below
-B, --ignore-backups do not list implied entries ending with ~
-c with -lt: sort by, and show, ctime (time of last modification of file status information); with -l: show ctime and sort by name; otherwise: sort by ctime, newest first
-C list entries by columns
--color[=WHEN] colorize the output; WHEN can be 'always' (default if omitted), 'auto', or 'never'; more info below
-d, --directory list directories themselves, not their contents
-D, --dired generate output designed for Emacs' dired mode
-f do not sort, enable -aU, disable -ls --color
-F, --classify append indicator (one of */=>@|) to entries
--file-type likewise, except do not append '*'
--format=WORD across -x, commas -m, horizontal -x, long -l, single-column -1, verbose -l, vertical -C
--full-time like -l --time-style=full-iso
-g like -l, but do not list owner
--group-directories-first group directories before files; can be augmented with a --sort option, but any use of --sort=none (-U) disables grouping
-G, --no-group in a long listing, don't print group names
-h, --human-readable with -l and -s, print sizes like 1K 234M 2G etc.
--si likewise, but use powers of 1000 not 1024
-H, --dereference-command-line follow symbolic links listed on the command line
--dereference-command-line-symlink-to-dir follow each command line symbolic link that points to a directory
--hide=PATTERN do not list implied entries matching shell PATTERN (overridden by -a or -A)
--hyperlink[=WHEN] hyperlink file names; WHEN can be 'always' (default if omitted), 'auto', or 'never'
--indicator-style=WORD append indicator with style WORD to entry names: none (default), slash (-p), file-type (--file-type), classify (-F)
-i, --inode print the index number of each file
-I, --ignore=PATTERN do not list implied entries matching shell PATTERN
-k, --kibibytes default to 1024-byte blocks for disk usage; used only with -s and per directory totals
-l use a long listing format
-L, --dereference when showing file information for a symbolic link, show information for the file the link references rather than for the link itself
-m fill width with a comma separated list of entries
-n, --numeric-uid-gid like -l, but list numeric user and group IDs
-N, --literal print entry names without quoting
-o like -l, but do not list group information
-p, --indicator-style=slash append / indicator to directories
-q, --hide-control-chars print ? instead of nongraphic characters
--show-control-chars show nongraphic characters as-is (the default, unless program is 'ls' and output is a terminal)
-Q, --quote-name enclose entry names in double quotes
--quoting-style=WORD use quoting style WORD for entry names: literal, locale, shell, shell-always, shell-escape, shell-escape-always, c, escape (overrides QUOTING_STYLE environment variable)
-r, --reverse reverse order while sorting
-R, --recursive list subdirectories recursively
-s, --size print the allocated size of each file, in blocks
-S sort by file size, largest first
--sort=WORD sort by WORD instead of name: none (-U), size (-S), time (-t), version (-v), extension (-X)
--time=WORD change the default of using modification times; access time (-u): atime, access, use; change time (-c): ctime, status; birth time: birth, creation; with -l, WORD determines which time to show; with --sort=time, sort by WORD (newest first)
--time-style=TIME_STYLE time/date format with -l; see TIME_STYLE below
-t sort by time, newest first; see --time
-T, --tabsize=COLS assume tab stops at each COLS instead of 8
-u with -lt: sort by, and show, access time; with -l: show access time and sort by name; otherwise: sort by access time, newest first
-U do not sort; list entries in directory order
-v natural sort of (version) numbers within text
-w, --width=COLS set output width to COLS. 0 means no limit
-x list entries by lines instead of by columns
-X sort alphabetically by entry extension
-Z, --context print any security context of each file
-1 list one file per line. Avoid '\n' with -q or -b
--help display this help and exit
--version output version information and exit

1. Parse arguments - [x] tags: lhRtucr1mgodF, --full-time - [ ] path - should check path is directory or file. 2. Data structure - [ ] file type - [ ] permissions - [ ] number of hard links - [ ] owner - [ ] group - [ ] size - [ ] last-modified date-time - [ ] name - [ ] author 3. Output - [ ] list names wrt window width - [ ] colors 4. Flags - [ ] -a, --all do not ignore entries starting with . - [ ] -A, --almost-all do not list implied . and .. - [ ] --author with -l, print the author of each file - [ ] -b, --escape print C-style escapes for nongraphic characters - [ ] --block-size=SIZE with -l, scale sizes by SIZE when printing them; e.g., '--block-size=M'; see SIZE format below - [ ] -B, --ignore-backups do not list implied entries ending with ~ - [ ] -c with -lt: sort by, and show, ctime (time of last modification of file status information); with -l: show ctime and sort by name; otherwise: sort by ctime, newest first - [ ] -C list entries by columns - [ ] --color[=WHEN] colorize the output; WHEN can be 'always' (default if omitted), 'auto', or 'never'; more info below - [ ] -d, --directory list directories themselves, not their contents - [ ] -D, --dired generate output designed for Emacs' dired mode - [ ] -f do not sort, enable -aU, disable -ls --color - [ ] -F, --classify append indicator (one of */=>@|) to entries - [ ] --file-type likewise, except do not append '*' - [ ] --format=WORD across -x, commas -m, horizontal -x, long -l, single-column -1, verbose -l, vertical -C - [ ] --full-time like -l --time-style=full-iso - [ ] -g like -l, but do not list owner - [ ] --group-directories-first group directories before files; can be augmented with a --sort option, but any use of --sort=none (-U) disables grouping - [ ] -G, --no-group in a long listing, don't print group names - [ ] -h, --human-readable with -l and -s, print sizes like 1K 234M 2G etc. - [ ] --si likewise, but use powers of 1000 not 1024 - [ ] -H, --dereference-command-line follow symbolic links listed on the command line - [ ] --dereference-command-line-symlink-to-dir follow each command line symbolic link that points to a directory - [ ] --hide=PATTERN do not list implied entries matching shell PATTERN (overridden by -a or -A) - [ ] --hyperlink[=WHEN] hyperlink file names; WHEN can be 'always' (default if omitted), 'auto', or 'never' - [ ] --indicator-style=WORD append indicator with style WORD to entry names: none (default), slash (-p), file-type (--file-type), classify (-F) - [ ] -i, --inode print the index number of each file - [ ] -I, --ignore=PATTERN do not list implied entries matching shell PATTERN - [ ] -k, --kibibytes default to 1024-byte blocks for disk usage; used only with -s and per directory totals - [ ] -l use a long listing format - [ ] -L, --dereference when showing file information for a symbolic link, show information for the file the link references rather than for the link itself - [ ] -m fill width with a comma separated list of entries - [ ] -n, --numeric-uid-gid like -l, but list numeric user and group IDs - [ ] -N, --literal print entry names without quoting - [ ] -o like -l, but do not list group information - [ ] -p, --indicator-style=slash append / indicator to directories - [ ] -q, --hide-control-chars print ? instead of nongraphic characters - [ ] --show-control-chars show nongraphic characters as-is (the default, unless program is 'ls' and output is a terminal) - [ ] -Q, --quote-name enclose entry names in double quotes - [ ] --quoting-style=WORD use quoting style WORD for entry names: literal, locale, shell, shell-always, shell-escape, shell-escape-always, c, escape (overrides QUOTING_STYLE environment variable) - [ ] -r, --reverse reverse order while sorting - [ ] -R, --recursive list subdirectories recursively - [ ] -s, --size print the allocated size of each file, in blocks - [ ] -S sort by file size, largest first - [ ] --sort=WORD sort by WORD instead of name: none (-U), size (-S), time (-t), version (-v), extension (-X) - [ ] --time=WORD change the default of using modification times; access time (-u): atime, access, use; change time (-c): ctime, status; birth time: birth, creation; with -l, WORD determines which time to show; with --sort=time, sort by WORD (newest first) - [ ] --time-style=TIME_STYLE time/date format with -l; see TIME_STYLE below - [ ] -t sort by time, newest first; see --time - [ ] -T, --tabsize=COLS assume tab stops at each COLS instead of 8 - [ ] -u with -lt: sort by, and show, access time; with -l: show access time and sort by name; otherwise: sort by access time, newest first - [ ] -U do not sort; list entries in directory order - [ ] -v natural sort of (version) numbers within text - [ ] -w, --width=COLS set output width to COLS. 0 means no limit - [ ] -x list entries by lines instead of by columns - [ ] -X sort alphabetically by entry extension - [ ] -Z, --context print any security context of each file - [ ] -1 list one file per line. Avoid '\n' with -q or -b - [ ] --help display this help and exit - [ ] --version output version information and exit

mschoi commented

2025-02-13 14:24:21 +09:00

The SIZE argument is an integer and optional unit (example: 10K is 10*1024).
Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (powers of 1000).
Binary prefixes can be used, too: KiB=K, MiB=M, and so on.

The TIME_STYLE argument can be full-iso, long-iso, iso, locale, or +FORMAT.
FORMAT is interpreted like in date(1). If FORMAT is FORMAT1FORMAT2,
then FORMAT1 applies to non-recent files and FORMAT2 to recent files.
TIME_STYLE prefixed with 'posix-' takes effect only outside the POSIX locale.
Also the TIME_STYLE environment variable sets the default style to use.

Using color to distinguish file types is disabled both by default and
with --color=never. With --color=auto, ls emits color codes only when
standard output is connected to a terminal. The LS_COLORS environment
variable can change the settings. Use the dircolors command to set it.

The SIZE argument is an integer and optional unit (example: 10K is 10*1024). Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (powers of 1000). Binary prefixes can be used, too: KiB=K, MiB=M, and so on. The TIME_STYLE argument can be full-iso, long-iso, iso, locale, or +FORMAT. FORMAT is interpreted like in date(1). If FORMAT is FORMAT1<newline>FORMAT2, then FORMAT1 applies to non-recent files and FORMAT2 to recent files. TIME_STYLE prefixed with 'posix-' takes effect only outside the POSIX locale. Also the TIME_STYLE environment variable sets the default style to use. Using color to distinguish file types is disabled both by default and with --color=never. With --color=auto, ls emits color codes only when standard output is connected to a terminal. The LS_COLORS environment variable can change the settings. Use the dircolors command to set it.

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Reference: mschoi/rust-ls#1