ci: add manpage generation, migrate build script (#692)

Adds manpage generation to the build process, as well as following the xtask concept of adding additional build scripts that only need to run on deploy/nightly as opposed to `build.rs`. Note this doesn't follow the recommended method of using workplaces because I don't really want to shift the entire repo structure just for this.

More on xtask: https://github.com/matklad/cargo-xtask

9 files changed, 324 insertions, 59 deletions

diff --git a/.github/workflows/deployment.yml b/.github/workflows/deployment.yml
index 1d981d95..e5dcb4fe 100644
--- a/.github/workflows/deployment.yml
+++ b/.github/workflows/deployment.yml
@@ -82,11 +82,7 @@ jobs:
               target: "i686-unknown-linux-musl",
               cross: true,
             }
-          - {
-              os: "macOS-latest",
-              target: "x86_64-apple-darwin",
-              cross: false,
-            }
+          - { os: "macOS-latest", target: "x86_64-apple-darwin", cross: false }
           - {
               os: "windows-2019",
               target: "x86_64-pc-windows-msvc",
@@ -152,11 +148,15 @@ jobs:
           args: --release --verbose --target=${{ matrix.triple.target }} --features "battery"
           use-cross: ${{ matrix.triple.cross }}
 
-      - name: Move autocomplete to working directory
+      - name: Build autocompletion
         shell: bash
         run: |
-          mkdir completion
-          cp -r ./target/${{ matrix.triple.target }}/release/build/bottom-*/out/. completion
+          cargo run --manifest-path ./xtask/Cargo.toml -- completion completion
+
+      - name: Build manpage
+        shell: bash
+        run: |
+          cargo run --manifest-path ./xtask/Cargo.toml -- manpage manpage
 
       - name: Bundle release and completion (Windows)
         if: matrix.triple.os == 'windows-2019'
@@ -188,6 +188,13 @@ jobs:
           tar -C ./completion -czvf completion.tar.gz .
           mv completion.tar.gz release/
 
+      - name: Compress manpage files (Linux x86-64 GNU)
+        if: matrix.triple.target == 'x86_64-unknown-linux-gnu' && matrix.triple.container == ''
+        shell: bash
+        run: |
+          tar -C ./manpage -czvf manpage.tar.gz .
+          mv manpage.tar.gz release/
+
       - name: Save release as artifact
         uses: actions/upload-artifact@v2
         with:
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 7899db26..2db1942f 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -144,11 +144,15 @@ jobs:
           args: --release --verbose --target=${{ matrix.triple.target }} --features "battery"
           use-cross: ${{ matrix.triple.cross }}
 
-      - name: Move autocomplete to working directory
+      - name: Build autocompletion
         shell: bash
         run: |
-          mkdir completion
-          cp -r ./target/${{ matrix.triple.target }}/release/build/bottom-*/out/. completion
+          cargo run --manifest-path ./xtask/Cargo.toml -- completion completion
+
+      - name: Build manpage
+        shell: bash
+        run: |
+          cargo run --manifest-path ./xtask/Cargo.toml -- manpage manpage
 
       - name: Bundle release and completion (Windows)
         if: matrix.triple.os == 'windows-2019'
@@ -180,6 +184,13 @@ jobs:
           tar -C ./completion -czvf completion.tar.gz .
           mv completion.tar.gz release/
 
+      - name: Compress manpage files (Linux x86-64 GNU)
+        if: matrix.triple.target == 'x86_64-unknown-linux-gnu' && matrix.triple.container == ''
+        shell: bash
+        run: |
+          tar -C ./manpage -czvf manpage.tar.gz .
+          mv manpage.tar.gz release/
+
       - name: Save release files as artifacts
         uses: actions/upload-artifact@v2
         with:
diff --git a/Cargo.lock b/Cargo.lock
index dc24694d..d28b3cbe 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -230,7 +230,6 @@ dependencies = [
  "cargo-husky",
  "cfg-if",
  "clap",
- "clap_complete",
  "crossterm",
  "ctrlc",
  "dirs",
@@ -326,15 +325,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "clap_complete"
-version = "3.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df6f3613c0a3cddfd78b41b10203eb322cb29b600cbdf808a7d3db95691b8e25"
-dependencies = [
- "clap",
-]
-
-[[package]]
 name = "concurrent-queue"
 version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/Cargo.toml b/Cargo.toml
index 21547dc2..b45e9123 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,6 @@ description = "A customizable cross-platform graphical process/system monitor fo
 documentation = "https://clementtsang.github.io/bottom/stable"
 readme = "README.md"
 default-run = "btm"
-build = "build.rs"
 
 [[bin]]
 name = "btm"
@@ -84,10 +83,6 @@ winapi = "0.3.9"
 assert_cmd = "2.0"
 predicates = "2.1"
 
-[build-dependencies]
-clap = { version = "3.1.6", features = ["default", "cargo", "wrap_help"] }
-clap_complete = "3.1.1"
-
 
 [package.metadata.deb]
 section = "utility"
diff --git a/build.rs b/build.rs
deleted file mode 100644
index 479ab963..00000000
--- a/build.rs
+++ /dev/null
@@ -1,33 +0,0 @@
-use clap_complete::{generate_to, shells::Shell};
-use std::{env, fs, process};
-
-include!("src/clap.rs");
-
-fn main() {
-    // OUT_DIR is where extra build files are written to for Cargo.
-    let out_dir = match env::var_os("OUT_DIR") {
-        Some(out_dir) => out_dir,
-        None => {
-            eprintln!("The OUT_DIR environment variable was not set!  Aborting...");
-            process::exit(1)
-        }
-    };
-    match fs::create_dir_all(&out_dir) {
-        Ok(()) => {}
-        Err(err) => {
-            eprintln!(
-                "Failed to create a directory at OUT_DIR location {:?}, encountered error {:?}.  Aborting...",
-                out_dir, err
-            );
-            process::exit(1)
-        }
-    }
-
-    // Generate completions
-    let mut app = build_app();
-    generate_to(Shell::Bash, &mut app, "btm", &out_dir).unwrap();
-    generate_to(Shell::Zsh, &mut app, "btm", &out_dir).unwrap();
-    generate_to(Shell::Fish, &mut app, "btm", &out_dir).unwrap();
-    generate_to(Shell::PowerShell, &mut app, "btm", &out_dir).unwrap();
-    generate_to(Shell::Elvish, &mut app, "btm", &out_dir).unwrap();
-}
diff --git a/xtask/.gitignore b/xtask/.gitignore
new file mode 100644
index 00000000..6558add1
--- /dev/null
+++ b/xtask/.gitignore
@@ -0,0 +1,37 @@
+# Generated by Cargo
+# will have compiled files and executables
+/target/
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# Logging
+*.log
+
+# Flamegraph stuff
+rust-unmangle
+*.svg
+*.data
+*.data.old
+
+# IntelliJ
+.idea/
+
+# Heaptrack files
+*.zst
+
+# For testing
+sample_configs/testing.toml
+
+# Wix
+/wix/
+
+# Cargo-deny
+deny.toml
+
+# vscode
+.vscode
+
+# mkdocs
+site/
+docs/site
\ No newline at end of file
diff --git a/xtask/Cargo.lock b/xtask/Cargo.lock
new file mode 100644
index 00000000..5516c6e2
--- /dev/null
+++ b/xtask/Cargo.lock
@@ -0,0 +1,194 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "clap"
+version = "3.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8c93436c21e4698bacadf42917db28b23017027a4deccb35dbe47a7e7840123"
+dependencies = [
+ "atty",
+ "bitflags",
+ "indexmap",
+ "lazy_static",
+ "os_str_bytes",
+ "strsim",
+ "termcolor",
+ "terminal_size",
+ "textwrap",
+]
+
+[[package]]
+name = "clap_complete"
+version = "3.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df6f3613c0a3cddfd78b41b10203eb322cb29b600cbdf808a7d3db95691b8e25"
+dependencies = [
+ "clap",
+]
+
+[[package]]
+name = "clap_mangen"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0649fb4156bbd7306896025005596033879a2051f9a3aa7416ab915df1f8fdac"
+dependencies = [
+ "clap",
+ "roff",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "indexmap"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282a6247722caba404c065016bbfa522806e51714c34f5dfc3e4a3a46fcb4223"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "libc"
+version = "0.2.119"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bf2e165bb3457c8e098ea76f3e3bc9db55f87aa90d52d0e6be741470916aaa4"
+
+[[package]]
+name = "memchr"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
+
+[[package]]
+name = "os_str_bytes"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e22443d1643a904602595ba1cd8f7d896afe56d26712531c5ff73a15b2fbf64"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "roff"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b833d8d034ea094b1ea68aa6d5c740e0d04bad9d16568d08ba6f76823a114316"
+
+[[package]]
+name = "strsim"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+
+[[package]]
+name = "termcolor"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bab24d30b911b2376f3a13cc2cd443142f0c81dda04c118693e35b3835757755"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "terminal_size"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "633c1a546cee861a1a6d0dc69ebeca693bf4296661ba7852b9d21d159e0506df"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "textwrap"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1141d4d61095b28419e22cb0bbf02755f5e54e0526f97f1e3d1d160e60885fb"
+dependencies = [
+ "terminal_size",
+]
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "xtask"
+version = "0.1.0"
+dependencies = [
+ "clap",
+ "clap_complete",
+ "clap_mangen",
+]
diff --git a/xtask/Cargo.toml b/xtask/Cargo.toml
new file mode 100644
index 00000000..ebc0b8d5
--- /dev/null
+++ b/xtask/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "xtask"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+clap = { version = "3.1.6", features = ["default", "cargo", "wrap_help"] }
+clap_complete = "3.1.1"
+clap_mangen = "0.1.2"
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
new file mode 100644
index 00000000..1d56e17c
--- /dev/null
+++ b/xtask/src/main.rs
@@ -0,0 +1,55 @@
+use clap_complete::{generate_to, shells::Shell};
+use std::{env, fs, io::Result, path::PathBuf, process};
+
+include!("../../src/clap.rs");
+
+fn main() -> Result<()> {
+    let command = if let Some(command) = env::args().nth(1) {
+        command
+    } else {
+        eprintln!("A command was not given!");
+        process::exit(1)
+    };
+
+    let out_dir = if let Some(out_dir) = env::args().nth(2) {
+        PathBuf::from(out_dir)
+    } else {
+        eprintln!("An output directory was not set!");
+        process::exit(1)
+    };
+
+    if let Err(err) = fs::create_dir_all(&out_dir) {
+        eprintln!(
+            "Failed to create a directory at the output director location {:?}, encountered error {:?}.  Aborting...",
+            out_dir, err
+        );
+        process::exit(1)
+    }
+
+    match command.as_str() {
+        "completion" => {
+            // Generate completions
+            let mut app = build_app();
+            generate_to(Shell::Bash, &mut app, "btm", &out_dir)?;
+            generate_to(Shell::Zsh, &mut app, "btm", &out_dir)?;
+            generate_to(Shell::Fish, &mut app, "btm", &out_dir)?;
+            generate_to(Shell::PowerShell, &mut app, "btm", &out_dir)?;
+            generate_to(Shell::Elvish, &mut app, "btm", &out_dir)?;
+        }
+        "manpage" => {
+            // Generate manpage
+            let app = build_app();
+            let man = clap_mangen::Man::new(app);
+            let mut buffer: Vec<u8> = Default::default();
+            man.render(&mut buffer).unwrap();
+
+            std::fs::write(out_dir.join("btm.1"), buffer)?;
+        }
+        _ => {
+            eprintln!("Invalid command given: `{}`", command);
+            process::exit(1)
+        }
+    }
+
+    Ok(())
+}