Add option to not read any config file

README.md

@@ -181,7 +181,7 @@ is available at
 
 Note for contributors: this repository's configuration file will be
 automatically applied if tex-fmt is run from within the repository.
-Change working directory or use `--config <config>` to avoid this.
+Use `--noconfig` or `--config <config>` to avoid this.
 
 ### Disabling the formatter
 
@@ -297,3 +297,4 @@ The following command-line options are offered by tex-fmt.
 | `--completion` |       |         | Generate a shell completion script |
 | `--man`        |       |         | Generate a man page |
 | `--args`       |       |         | View arguments passed to tex-fmt |
+| `--noconfig`   |       |         | Do not read any config file |

completion/_tex-fmt

@@ -37,6 +37,7 @@ _tex-fmt() {
 '--usetabs[Use tabs instead of spaces for indentation]' \
 '--man[Generate man page]' \
 '--args[Print arguments passed to tex-fmt and exit]' \
+'--noconfig[Do not read any config file]' \
 '-h[Print help]' \
 '--help[Print help]' \
 '::files -- List of files to be formatted:_default' \

completion/_tex-fmt.ps1

@@ -43,6 +43,7 @@ Register-ArgumentCompleter -Native -CommandName 'tex-fmt' -ScriptBlock {
             [CompletionResult]::new('--usetabs', '--usetabs', [CompletionResultType]::ParameterName, 'Use tabs instead of spaces for indentation')
             [CompletionResult]::new('--man', '--man', [CompletionResultType]::ParameterName, 'Generate man page')
             [CompletionResult]::new('--args', '--args', [CompletionResultType]::ParameterName, 'Print arguments passed to tex-fmt and exit')
+            [CompletionResult]::new('--noconfig', '--noconfig', [CompletionResultType]::ParameterName, 'Do not read any config file')
             [CompletionResult]::new('-h', '-h', [CompletionResultType]::ParameterName, 'Print help')
             [CompletionResult]::new('--help', '--help', [CompletionResultType]::ParameterName, 'Print help')
             break

completion/tex-fmt.bash

@@ -19,7 +19,7 @@ _tex-fmt() {
 
     case "${cmd}" in
         tex__fmt)
-            opts="-c -p -n -v -q -s -t -l -h --check --print --nowrap --verbose --quiet --trace --stdin --tabsize --usetabs --wraplen --config --completion --man --args --help [files]..."
+            opts="-c -p -n -v -q -s -t -l -h --check --print --nowrap --verbose --quiet --trace --stdin --tabsize --usetabs --wraplen --config --completion --man --args --noconfig --help [files]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 1 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0

completion/tex-fmt.elv

@@ -40,6 +40,7 @@ set edit:completion:arg-completer[tex-fmt] = {|@words|
             cand --usetabs 'Use tabs instead of spaces for indentation'
             cand --man 'Generate man page'
             cand --args 'Print arguments passed to tex-fmt and exit'
+            cand --noconfig 'Do not read any config file'
             cand -h 'Print help'
             cand --help 'Print help'
         }

completion/tex-fmt.fish

@@ -12,4 +12,5 @@ complete -c tex-fmt -s s -l stdin -d 'Process stdin as a single file, output to
 complete -c tex-fmt -l usetabs -d 'Use tabs instead of spaces for indentation'
 complete -c tex-fmt -l man -d 'Generate man page'
 complete -c tex-fmt -l args -d 'Print arguments passed to tex-fmt and exit'
+complete -c tex-fmt -l noconfig -d 'Do not read any config file'
 complete -c tex-fmt -s h -l help -d 'Print help'

man/tex-fmt.1

@@ -4,7 +4,7 @@
 .SH NAME
 tex\-fmt \- An extremely fast LaTeX formatter written in Rust
 .SH SYNOPSIS
-\fBtex\-fmt\fR [\fB\-c\fR|\fB\-\-check\fR] [\fB\-p\fR|\fB\-\-print\fR] [\fB\-n\fR|\fB\-\-nowrap\fR] [\fB\-v\fR|\fB\-\-verbose\fR] [\fB\-q\fR|\fB\-\-quiet\fR] [\fB\-\-trace\fR] [\fB\-s\fR|\fB\-\-stdin\fR] [\fB\-t\fR|\fB\-\-tabsize\fR] [\fB\-\-usetabs\fR] [\fB\-l\fR|\fB\-\-wraplen\fR] [\fB\-\-config\fR] [\fB\-\-completion\fR] [\fB\-\-man\fR] [\fB\-\-args\fR] [\fB\-h\fR|\fB\-\-help\fR] [\fIfiles\fR] 
+\fBtex\-fmt\fR [\fB\-c\fR|\fB\-\-check\fR] [\fB\-p\fR|\fB\-\-print\fR] [\fB\-n\fR|\fB\-\-nowrap\fR] [\fB\-v\fR|\fB\-\-verbose\fR] [\fB\-q\fR|\fB\-\-quiet\fR] [\fB\-\-trace\fR] [\fB\-s\fR|\fB\-\-stdin\fR] [\fB\-t\fR|\fB\-\-tabsize\fR] [\fB\-\-usetabs\fR] [\fB\-l\fR|\fB\-\-wraplen\fR] [\fB\-\-config\fR] [\fB\-\-completion\fR] [\fB\-\-man\fR] [\fB\-\-args\fR] [\fB\-\-noconfig\fR] [\fB\-h\fR|\fB\-\-help\fR] [\fIfiles\fR] 
 .SH DESCRIPTION
 An extremely fast LaTeX formatter written in Rust
 .SH OPTIONS
@@ -55,6 +55,9 @@ Generate man page
 \fB\-\-args\fR
 Print arguments passed to tex\-fmt and exit
 .TP
+\fB\-\-noconfig\fR
+Do not read any config file
+.TP
 \fB\-h\fR, \fB\-\-help\fR
 Print help
 .TP

notes.org

@@ -3,14 +3,14 @@
 ** TODO Improve build times
 ** TODO Include man page and shell completion in Nix package
 ** TODO Add to Nix home-manager with empty config file
-** TODO Add option for no config file
 * Options and documentation
 ** Args struct
 ** OptionArgs struct
 ** CLI command
 ** CLI args parser function
 ** Config args parser function
 ** Implement Display for Args
+** Args resolver
 ** GitHub README
 * Release process
 ** Update release notes

src/args.rs

@@ -38,6 +38,8 @@ pub struct Args {
     pub config: Option<PathBuf>,
     /// Print arguments and exit
     pub arguments: bool,
+    /// Do not read any config file
+    pub noconfig: bool,
 }
 
 /// Arguments using Options to track CLI/config file/default values
@@ -57,6 +59,7 @@ pub struct OptionArgs {
     pub wrapmin: Option<u8>,
     pub config: Option<PathBuf>,
     pub arguments: Option<bool>,
+    pub noconfig: Option<bool>,
 }
 
 /// Character to use for indentation
@@ -91,6 +94,7 @@ impl Default for OptionArgs {
             wrapmin: Some(70),
             config: None,
             arguments: Some(false),
+            noconfig: Some(false),
         }
     }
 }
@@ -122,6 +126,7 @@ impl Args {
             wrapmin: args.wrapmin.unwrap(),
             config: args.config,
             arguments: args.arguments.unwrap(),
+            noconfig: args.noconfig.unwrap(),
         }
     }
 
@@ -225,7 +230,7 @@ impl fmt::Display for Args {
             None => display_arg_line(f, "config", "None")?,
             Some(c) => display_arg_line(f, "config", &c.display().to_string())?,
         }
-        // Note we do not print the `arguments` field as it's not useful
+        // Do not print `arguments` or `noconfig` fields
         Ok(())
     }
 }

src/cli.rs

@@ -79,6 +79,11 @@ pub fn get_cli_args() -> OptionArgs {
         } else {
             None
         },
+        noconfig: if arg_matches.get_flag("noconfig") {
+            Some(true)
+        } else {
+            None
+        },
     };
     args
 }

src/command.rs

@@ -106,4 +106,10 @@ fn get_cli_command() -> Command {
                 .action(SetTrue)
                 .help("Print arguments passed to tex-fmt and exit"),
         )
+        .arg(
+            Arg::new("noconfig")
+                .long("noconfig")
+                .action(SetTrue)
+                .help("Do not read any config file"),
+        )
 }

src/config.rs

@@ -13,6 +13,10 @@ const CONFIG: &str = "tex-fmt.toml";
 
 /// Try finding a config file in various sources
 fn resolve_config_path(args: &OptionArgs) -> Option<PathBuf> {
+    // Do not read config file
+    if args.noconfig == Some(true) {
+        return None;
+    };
     // Named path passed as cli arg
     if args.config.is_some() {
         return args.config.clone();
@@ -113,7 +117,8 @@ pub fn get_config_args(args: &OptionArgs) -> Option<OptionArgs> {
             .get("wrapmin")
             .map(|x| x.as_integer().unwrap().try_into().unwrap()),
         config: config_path,
-        arguments: config.get("arguments").map(|x| x.as_bool().unwrap()),
+        arguments: None,
+        noconfig: None,
     };
     Some(args)
 }