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Fix config priority order (CLI > YAML > ENV), clarify multi-value cycling behavior, and improve documentation examples

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Aykhan Shahsuvarov
2026-01-16 23:15:12 +04:00
parent a512f3605d
commit 76225884e6
4 changed files with 51 additions and 22 deletions
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8
README.md
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@@ -93,7 +93,7 @@ For more usage examples, see the **[Examples Guide](docs/examples.md)**.
Sarin supports environment variables, CLI flags, and YAML files. When the same option is specified in multiple sources, the following priority order applies: Sarin supports environment variables, CLI flags, and YAML files. When the same option is specified in multiple sources, the following priority order applies:
``` ```
YAML (Highest) > CLI Flags > Environment Variables (Lowest) CLI Flags (Highest) > YAML > Environment Variables (Lowest)
``` ```
For detailed documentation on all configuration options (URL, method, timeout, concurrency, headers, cookies, proxy, etc.), see the **[Configuration Guide](docs/configuration.md)**. For detailed documentation on all configuration options (URL, method, timeout, concurrency, headers, cookies, proxy, etc.), see the **[Configuration Guide](docs/configuration.md)**.
@@ -106,9 +106,9 @@ Sarin supports Go templates in URL paths, methods, bodies, headers, params, cook
```sh ```sh
sarin -U "http://example.com/users/{{ fakeit_UUID }}" -r 1000 -c 10 \ sarin -U "http://example.com/users/{{ fakeit_UUID }}" -r 1000 -c 10 \
-V "RequestID={{ fakeit_UUID }}" \ -V "REQUEST_ID={{ fakeit_UUID }}" \
-H "X-Request-ID: {{ .Values.RequestID }}" \ -H "X-Request-ID: {{ .Values.REQUEST_ID }}" \
-B '{"request_id": "{{ .Values.RequestID }}"}' -B '{"request_id": "{{ .Values.REQUEST_ID }}"}'
``` ```
For the complete templating guide and functions reference, see the **[Templating Guide](docs/templating.md)**. For the complete templating guide and functions reference, see the **[Templating Guide](docs/templating.md)**.

57
docs/configuration.md
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@@ -5,7 +5,7 @@ Sarin supports environment variables, CLI flags, and YAML files. However, they a
When the same option is specified in multiple sources, the following priority order applies: When the same option is specified in multiple sources, the following priority order applies:
``` ```
YAML (Highest) > CLI Flags > Environment Variables (Lowest) CLI Flags (Highest) > YAML > Environment Variables (Lowest)
``` ```
Use `-s` or `--show-config` to see the final merged configuration before sending requests. Use `-s` or `--show-config` to see the final merged configuration before sending requests.
@@ -14,8 +14,8 @@ Use `-s` or `--show-config` to see the final merged configuration before sending
> **Note:** For CLI flags with `string / []string` type, the flag can be used once with a single value or multiple times to provide multiple values. > **Note:** For CLI flags with `string / []string` type, the flag can be used once with a single value or multiple times to provide multiple values.
| Name | YAML | CLI | ENV | Default | Description | | Name | YAML | CLI | ENV | Default | Description |
| --------------------------- | ----------------------------------- | --------------------------------------------- | -------------------------------- | ------- | ---------------------------- | | --------------------------- | ----------------------------------- | -------------------------------------------- | -------------------------------- | ------- | ---------------------------- |
| [Help](#help) | - | `-help` / `-h` | - | - | Show help message | | [Help](#help) | - | `-help` / `-h` | - | - | Show help message |
| [Version](#version) | - | `-version` / `-v` | - | - | Show version and build info | | [Version](#version) | - | `-version` / `-v` | - | - | Show version and build info |
| [Show Config](#show-config) | `showConfig`<br>(boolean) | `-show-config` / `-s`<br>(boolean) | `SARIN_SHOW_CONFIG`<br>(boolean) | `false` | Show merged configuration | | [Show Config](#show-config) | `showConfig`<br>(boolean) | `-show-config` / `-s`<br>(boolean) | `SARIN_SHOW_CONFIG`<br>(boolean) | `false` | Show merged configuration |
@@ -43,36 +43,65 @@ Use `-s` or `--show-config` to see the final merged configuration before sending
Show help message. Show help message.
```sh
sarin -help
```
## Version ## Version
Show version and build information. Show version and build information.
```sh
sarin -version
```
## Show Config ## Show Config
Show the final merged configuration before sending requests. Show the final merged configuration before sending requests.
```sh
sarin -show-config
```
## Config File ## Config File
Path to configuration file(s). Supports local paths and remote URLs. Path to configuration file(s). Supports local paths and remote URLs.
If multiple config files are specified, they are merged in order. Later files override earlier ones. **Priority Rules:**
1. **CLI flags** (`-f`) have highest priority, processed left to right (rightmost wins)
2. **Included files** (via `configFile` property) are processed with lower priority than their parent
3. **Environment variable** (`SARIN_CONFIG_FILE`) has lowest priority
**Example:** **Example:**
```yaml ```yaml
# config2.yaml # config2.yaml
configFile: /config4.yaml configFile: /config4.yaml
url: http://from-config2.com
``` ```
```sh ```sh
SARIN_CONFIG_FILE=/config1.yaml sarin -f /config2.yaml -f https://example.com/config3.yaml SARIN_CONFIG_FILE=/config1.yaml sarin -f /config2.yaml -f https://example.com/config3.yaml
``` ```
In this example, all 4 config files are read and merged with the following priority: **Resolution order (lowest to highest priority):**
``` | Source | File | Priority |
config3.yaml > config2.yaml > config4.yaml > config1.yaml | ------------------------ | ------------ | -------- |
``` | ENV (SARIN_CONFIG_FILE) | config1.yaml | Lowest |
| Included by config2.yaml | config4.yaml | ↑ |
| CLI -f (first) | config2.yaml | ↑ |
| CLI -f (second) | config3.yaml | Highest |
**Why this order?**
- `config1.yaml` comes from ENV → lowest priority
- `config2.yaml` comes from CLI → higher than ENV
- `config4.yaml` is included BY `config2.yaml` → inherits position below its parent
- `config3.yaml` comes from CLI after `config2.yaml` → highest priority
If all four files define `url`, the value from `config3.yaml` wins.
## URL ## URL
@@ -94,7 +123,7 @@ sarin -U "http://example.com/users/{{ fakeit_UUID }}" -r 1000 -c 10
## Method ## Method
HTTP method(s). If multiple values are provided, Sarin cycles through them randomly for each request. Supports [templating](templating.md). HTTP method(s). If multiple values are provided, Sarin cycles through them in order, starting from a random index for each request. Supports [templating](templating.md).
**YAML example:** **YAML example:**
@@ -167,7 +196,7 @@ Skip TLS certificate verification.
## Body ## Body
Request body. If multiple values are provided, Sarin cycles through them randomly for each request. Supports [templating](templating.md). Request body. If multiple values are provided, Sarin cycles through them in order, starting from a random index for each request. Supports [templating](templating.md).
**YAML example:** **YAML example:**
@@ -196,7 +225,7 @@ SARIN_BODY='{"product": "car"}'
## Params ## Params
URL query parameters. If multiple values are provided for a key, Sarin cycles through them randomly for each request. Supports [templating](templating.md). URL query parameters. If multiple values are provided for a key, Sarin cycles through them in order, starting from a random index for each request. Supports [templating](templating.md).
**YAML example:** **YAML example:**
@@ -226,7 +255,7 @@ SARIN_PARAM="key1=value1"
## Headers ## Headers
HTTP headers. If multiple values are provided for a key, Sarin cycles through them randomly for each request. Supports [templating](templating.md). HTTP headers. If multiple values are provided for a key, Sarin cycles through them in order, starting from a random index for each request. Supports [templating](templating.md).
**YAML example:** **YAML example:**
@@ -256,7 +285,7 @@ SARIN_HEADER="key1: value1"
## Cookies ## Cookies
HTTP cookies. If multiple values are provided for a key, Sarin cycles through them randomly for each request. Supports [templating](templating.md). HTTP cookies. If multiple values are provided for a key, Sarin cycles through them in order, starting from a random index for each request. Supports [templating](templating.md).
**YAML example:** **YAML example:**
@@ -286,7 +315,7 @@ SARIN_COOKIE="key1=value1"
## Proxy ## Proxy
Proxy URL(s). If multiple values are provided, Sarin cycles through them randomly for each request. Proxy URL(s). If multiple values are provided, Sarin cycles through them in order, starting from a random index for each request.
Supported protocols: `http`, `https`, `socks5`, `socks5h` Supported protocols: `http`, `https`, `socks5`, `socks5h`

6
docs/examples.md
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@@ -175,8 +175,8 @@ url: http://example.com/search
requests: 1000 requests: 1000
concurrency: 10 concurrency: 10
params: params:
query: test query: "test"
limit: "10" limit: 10
``` ```
</details> </details>
@@ -198,7 +198,7 @@ requests: 1000
concurrency: 10 concurrency: 10
params: params:
id: "{{ fakeit_IntRange 1 1000 }}" id: "{{ fakeit_IntRange 1 1000 }}"
fields: name,email fields: "name,email"
``` ```
</details> </details>

2
docs/templating.md
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@@ -532,7 +532,7 @@ These functions are powered by [gofakeit](https://github.com/brianvoe/gofakeit)
| Function | Description | Example | | Function | Description | Example |
| ------------------------------------- | ------------------------------- | --------------------------------------------------------------- | | ------------------------------------- | ------------------------------- | --------------------------------------------------------------- |
| `fakeit_Digit` | Single random digit | `"0"` | | `fakeit_Digit` | Single random digit | `"0"` |
| `fakeit_DigitN(n uint)` | Generate `n` random digits | `{{ fakeit_DigitN 5 }}` → `"0136459948"` | | `fakeit_DigitN(n uint)` | Generate `n` random digits | `{{ fakeit_DigitN 5 }}` → `"71364"` |
| `fakeit_Letter` | Single random letter | `"g"` | | `fakeit_Letter` | Single random letter | `"g"` |
| `fakeit_LetterN(n uint)` | Generate `n` random letters | `{{ fakeit_LetterN 10 }}` → `"gbRMaRxHki"` | | `fakeit_LetterN(n uint)` | Generate `n` random letters | `{{ fakeit_LetterN 10 }}` → `"gbRMaRxHki"` |
| `fakeit_Lexify(pattern string)` | Replace `?` with random letters | `{{ fakeit_Lexify "?????@??????.com" }}` → `"billy@mister.com"` | | `fakeit_Lexify(pattern string)` | Replace `?` with random letters | `{{ fakeit_Lexify "?????@??????.com" }}` → `"billy@mister.com"` |