## Performing Git Diff with simple-git
First, make sure you have the simple-git library imported in your TypeScript file:
```typescript
import simpleGit, { SimpleGit, DiffResult } from "simple-git";
```
Create a function that will perform the `Git diff` operation between two tags. The function should accept the tag names as parameters and return a promise that resolves to the diff output string.
```typescript
async function getGitDiff(tag1: string, tag2: string): Promise<string> {
const git: SimpleGit = simpleGit();
const diff: DiffResult = await git.diff([`${tag1}..${tag2}`]);
return diff.diff;
}
```
In the above code, we use the simpleGit function from the `simple-git` library to instantiate a new `SimpleGit` object. Then, we call the diff method with the tag range specified as `${tag1}..${tag2}`. This will retrieve the diff result as a `DiffResult` object, from which we extract the `diff` property containing the actual `diff output`.
Now you can call the getGitDiff function and retrieve the diff output between two tags:
```typescript
const tag1: string = "v1.0.0";
const tag2: string = "v1.1.0";
const diff: string = await getGitDiff(tag1, tag2);
console.log(diff);
```
## Use case: clone the repo to local drive then perform git diff
```typescript
import simpleGit, { SimpleGit, DiffResult } from "simple-git";
import * as fs from "fs-extra";
async function gitDiff(
repositoryUrl: string,
tag1: string,
tag2: string
): Promise<void> {
const git: SimpleGit = simpleGit();
const tempDir = "./temp-repo";
// Delete the temporary directory if it exists
if (fs.existsSync(tempDir)) {
console.log("tempDir exists, removing it");
await fs.remove(tempDir);
}
// Create a new empty temporary directory
console.log("creating tempDir");
await fs.mkdir(tempDir);
// Clone the repository from the provided URL
await git.clone(repositoryUrl, "./temp-repo");
// Change the working directory to the cloned repository
git.cwd("./temp-repo");
// Perform the 'git diff' operation
let diff: string = "";
try {
diff = await git.diff([`${tag1}..${tag2}`]);
console.log("diff", diff);
// Rest of the code...
} catch (error) {
console.error("An error occurred while performing git diff:", error);
}
// Remove the temporary repository
console.log(diff);
await fs.remove(tempDir);
}
```
Cheers! 🍺
Performing Git Diff with simple-git
First, make sure you have the simple-git library imported in your TypeScript file:
Create a function that will perform the Git diff operation between two tags. The function should accept the tag names as parameters and return a promise that resolves to the diff output string.
In the above code, we use the simpleGit function from the simple-git library to instantiate a new SimpleGit object. Then, we call the diff method with the tag range specified as ${tag1}..${tag2}. This will retrieve the diff result as a DiffResult object, from which we extract the diff property containing the actual diff output.
Now you can call the getGitDiff function and retrieve the diff output between two tags:
importsimpleGit,{SimpleGit,DiffResult}from"simple-git";import*asfsfrom"fs-extra";asyncfunctiongitDiff(repositoryUrl: string,tag1: string,tag2: string):Promise<void>{constgit: SimpleGit=simpleGit();consttempDir="./temp-repo";// Delete the temporary directory if it exists
if(fs.existsSync(tempDir)){console.log("tempDir exists, removing it");awaitfs.remove(tempDir);}// Create a new empty temporary directory
console.log("creating tempDir");awaitfs.mkdir(tempDir);// Clone the repository from the provided URL
awaitgit.clone(repositoryUrl,"./temp-repo");// Change the working directory to the cloned repository
git.cwd("./temp-repo");// Perform the 'git diff' operation
letdiff: string="";try{diff=awaitgit.diff([`${tag1}..${tag2}`]);console.log("diff",diff);// Rest of the code...
}catch(error){console.error("An error occurred while performing git diff:",error);}// Remove the temporary repository
console.log(diff);awaitfs.remove(tempDir);}