Crate guidon[−][src]
guidon
guidon performs templating based on handlebars templating system.
Usage
Files to be handles needs to have an .hbs
extension. Folders and files names can be templatized too : {{folder/subfolder}}
The entry point is the Guidon structure.
Basic init
let mut guidon = Guidon::new(PathBuf::from("path/to/template/dir")); let mut vars = BTreeMap::new(); vars.insert("key1".to_string(), "value1".to_string()); guidon.variables(vars); guidon.apply_template("path/to/destination").unwrap();
With this initialization:
- guidon will use the vars map to find substitution values.
- guidon will parse the directory
path/to/template/dir/template
- the result will be written in
path/to/destination
TryNew init
guidon implements a TryNew trait to initialize from a dir or a git repo
TryNew from path
let mut guidon = Guidon::try_new("path/to/template/dir").unwrap();
With this initialization:
- guidon will init the substitution variables from
path/to/template/dir/variables.toml
- guidon will parse the directory
path/to/template/dir/template
let mut guidon = Guidon::try_new("path/to/template/dir/my_vars.toml").unwrap();
With this initialization:
- guidon will init the substitution variables from
path/to/template/dir/my_vars.toml
- guidon will parse the directory
path/to/template/dir
TryNew from CustomTemplate
Guidon can be provided with specific template file and directory to parse.
let custom = CustomTemplate { dir_path: Path::new("path/to/template/dir"), template_path: Path::new("path/to/my_vars.toml") }; let mut guidon = Guidon::try_new(custom);
TryNew from git repo
let git = GitOptions::builder() .repo("url/to/repo") .build() .unwrap(); let mut guidon = Guidon::try_new(git);
With this initialization
- guidon will clone the repo to a temporary directory
- guidon will init the substitutions variables from
tmp/dir/template.toml
- when applying template, guidon will parse the directory
tmp/dir/template
The git repo url could be in the form :
http[s]://[user[:password]]@uri/repo[.git]
where user and password must be part of the urlgit@uri:repo.git
. The key used must be loaded in an ssh-agent instance
Template variables
The configuration file is structured as follows :
# Key value pairs for template substitution
[variables]
test1 = "test 1"
test2 = "test 2"
Helpers
replace
. It’s simply replace a string by another in the value.Tell me: {{replace my_var everybody world}}
withmy_var="Hello everybody !
will render asTell me: Hello world !
.append
. Simply append a string to the value.Tell me: {{append my_var "and everybody !"}}
withmy_var="Hello world"
will render asTell me: Hello world and everybody !
.prepend
. Prepend a string to the value.Tell me: {{prepend my_var "Sure, "}}
withmy_var="hello world"
will render asTell me: Sure, hello world
.up
: Uppercase the valuelow
: Lowercase the valuedefault
: default to given value if input is null or emptyTell me: {{default my_var "Oops"}}
withmy_var
not defined will render asTell me: Oops
encrypt
: Encrypt the data. The key must be provideddecrypt
: Decrypt the data
encrypt and decrypt helpers are provide with the
crypto
feature.
Callbacks
guidon offers the possiblity to provide two callbacks :
- a variables callback to operate on the variables before applying the template
- a render callback, which is called if a missing value is detected while rendering the template.
These callbacks could be use for user interaction, or default behaviour.
Variable callback
In this example, the callback will add " cb"
to every value.
let cb = |h: &mut BTreeMap<String, String>| { h.iter_mut().for_each(|(_, v)| *v +=" cb"); }; let mut guidon = Guidon::new(PathBuf::from("template/path")); guidon.set_variables_callback(cb);
Render callback
In this example, the callback will replace any missing value by the key concatenated with "-cb"
// this callback will add `-cb` to the key as a value let cb = |h: String| { let mut s = h.clone(); s.push_str("-cb"); s }; let mut guidon = Guidon::new(PathBuf::from("template/path")); guidon.set_render_callback(cb);
File and Directory names
Filnames and directory can also be templatized.
Super-{{my_var}}-content.txt
will render as Super-boring-content.txt
given my_var="boring"
.
If the content of the file is templatized, we have Super-{{my_var}}-content.txt.hbs
.//!
Logs
guidon uses the log facade.
Structs
CustomTemplate | |
GitOptions | GitOptions for git initialization. cf GitOptionsBuilder documentation. |
GitOptionsBuilder | Builder for |
Guidon | The Guidon structure |
GuidonError |
Traits
TryNew | Try to initialize Guidon from different sources |
Functions
gdecrypt | Decrypt a string with the given key |
gencrypt | Encrypt a string with the given key |
Type Definitions
Result |