env modification
This commit is contained in:
parent
7e2b76e125
commit
11df0f41fa
3 changed files with 300 additions and 4 deletions
230
Cargo.lock
generated
230
Cargo.lock
generated
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@ -2,6 +2,236 @@
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "anstream"
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version = "0.6.14"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "418c75fa768af9c03be99d17643f93f79bbba589895012a80e3452a19ddda15b"
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dependencies = [
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"anstyle",
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"anstyle-parse",
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"anstyle-query",
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"anstyle-wincon",
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"colorchoice",
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"is_terminal_polyfill",
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"utf8parse",
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]
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[[package]]
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name = "anstyle"
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version = "1.0.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "038dfcf04a5feb68e9c60b21c9625a54c2c0616e79b72b0fd87075a056ae1d1b"
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[[package]]
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name = "anstyle-parse"
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version = "0.2.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c03a11a9034d92058ceb6ee011ce58af4a9bf61491aa7e1e59ecd24bd40d22d4"
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dependencies = [
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"utf8parse",
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]
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[[package]]
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name = "anstyle-query"
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version = "1.0.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a64c907d4e79225ac72e2a354c9ce84d50ebb4586dee56c82b3ee73004f537f5"
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dependencies = [
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"windows-sys",
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]
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[[package]]
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name = "anstyle-wincon"
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version = "3.0.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "61a38449feb7068f52bb06c12759005cf459ee52bb4adc1d5a7c4322d716fb19"
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dependencies = [
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"anstyle",
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"windows-sys",
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]
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[[package]]
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name = "clap"
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version = "4.5.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "90bc066a67923782aa8515dbaea16946c5bcc5addbd668bb80af688e53e548a0"
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dependencies = [
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"clap_builder",
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"clap_derive",
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]
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[[package]]
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name = "clap_builder"
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version = "4.5.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ae129e2e766ae0ec03484e609954119f123cc1fe650337e155d03b022f24f7b4"
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dependencies = [
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"anstream",
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"anstyle",
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"clap_lex",
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"strsim",
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]
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[[package]]
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name = "clap_derive"
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version = "4.5.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "528131438037fd55894f62d6e9f068b8f45ac57ffa77517819645d10aed04f64"
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dependencies = [
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"heck",
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"proc-macro2",
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"quote",
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"syn",
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]
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[[package]]
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name = "clap_lex"
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version = "0.7.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "98cc8fbded0c607b7ba9dd60cd98df59af97e84d24e49c8557331cfc26d301ce"
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[[package]]
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name = "colorchoice"
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version = "1.0.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0b6a852b24ab71dffc585bcb46eaf7959d175cb865a7152e35b348d1b2960422"
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[[package]]
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name = "grub-reboot-rs"
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version = "0.1.0"
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dependencies = [
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"clap",
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]
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[[package]]
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name = "heck"
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version = "0.5.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
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[[package]]
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name = "is_terminal_polyfill"
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version = "1.70.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "f8478577c03552c21db0e2724ffb8986a5ce7af88107e6be5d2ee6e158c12800"
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[[package]]
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name = "proc-macro2"
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version = "1.0.82"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8ad3d49ab951a01fbaafe34f2ec74122942fe18a3f9814c3268f1bb72042131b"
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dependencies = [
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"unicode-ident",
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]
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[[package]]
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name = "quote"
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version = "1.0.36"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
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dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "strsim"
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version = "0.11.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
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[[package]]
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name = "syn"
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version = "2.0.63"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bf5be731623ca1a1fb7d8be6f261a3be6d3e2337b8a1f97be944d020c8fcb704"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-ident",
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]
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[[package]]
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name = "unicode-ident"
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version = "1.0.12"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
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[[package]]
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name = "utf8parse"
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version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
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[[package]]
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name = "windows-sys"
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version = "0.52.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
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dependencies = [
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"windows-targets",
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]
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[[package]]
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name = "windows-targets"
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version = "0.52.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "6f0713a46559409d202e70e28227288446bf7841d3211583a4b53e3f6d96e7eb"
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dependencies = [
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"windows_aarch64_gnullvm",
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"windows_aarch64_msvc",
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"windows_i686_gnu",
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"windows_i686_gnullvm",
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"windows_i686_msvc",
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"windows_x86_64_gnu",
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"windows_x86_64_gnullvm",
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"windows_x86_64_msvc",
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]
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[[package]]
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name = "windows_aarch64_gnullvm"
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version = "0.52.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7088eed71e8b8dda258ecc8bac5fb1153c5cffaf2578fc8ff5d61e23578d3263"
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[[package]]
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name = "windows_aarch64_msvc"
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version = "0.52.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9985fd1504e250c615ca5f281c3f7a6da76213ebd5ccc9561496568a2752afb6"
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[[package]]
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name = "windows_i686_gnu"
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version = "0.52.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "88ba073cf16d5372720ec942a8ccbf61626074c6d4dd2e745299726ce8b89670"
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[[package]]
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name = "windows_i686_gnullvm"
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version = "0.52.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "87f4261229030a858f36b459e748ae97545d6f1ec60e5e0d6a3d32e0dc232ee9"
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[[package]]
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name = "windows_i686_msvc"
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version = "0.52.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "db3c2bf3d13d5b658be73463284eaf12830ac9a26a90c717b7f771dfe97487bf"
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[[package]]
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name = "windows_x86_64_gnu"
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version = "0.52.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4e4246f76bdeff09eb48875a0fd3e2af6aada79d409d33011886d3e1581517d9"
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[[package]]
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name = "windows_x86_64_gnullvm"
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version = "0.52.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "852298e482cd67c356ddd9570386e2862b5673c85bd5f88df9ab6802b334c596"
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[[package]]
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name = "windows_x86_64_msvc"
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version = "0.52.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
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@ -4,3 +4,4 @@ version = "0.1.0"
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edition = "2021"
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[dependencies]
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clap = { version = "4.5.4", features = ["derive"] }
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73
src/main.rs
73
src/main.rs
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@ -1,9 +1,50 @@
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use std::{path::Path, process::exit};
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use std::{error::Error, path::PathBuf, process::exit, str::FromStr};
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use clap::Parser;
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/// Set the default boot menu entry for GRUB, for the next boot only.
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///
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/// MENU_ENTRY is a number, a menu item title or a menu item identifier. Please note that menu
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/// items in submenus or sub-submenus require specifying the submenu components and then the
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/// menu item component. The titles should be separated using the greater-than character (>)
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/// with no extra spaces. Depending on your shell some characters including > may need
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/// escaping. More information about this is available in the GRUB Manual in the section about
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/// the 'default' command.
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#[derive(Parser, Debug)]
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#[command(version, about, long_about)]
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struct Args {
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/// expect GRUB images under the directory DIR/grub instead of the /boot/grub directory
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/// (required on windows)
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#[arg(long)]
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boot_directory: Option<PathBuf>,
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/// a number, a menu item title or a menu item identifier.
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menu_entry: String,
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}
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#[cfg(not(windows))]
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const BOOT_PATH: &str = "/boot";
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fn main() {
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let boot_folder = Path::new(BOOT_PATH);
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fn main() -> Result<(), Box<dyn Error>> {
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let args = Args::parse();
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#[cfg(not(windows))]
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let boot_folder = args
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.boot_directory
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.or_else(|| PathBuf::from_str(BOOT_PATH).ok());
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#[cfg(not(windows))]
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let boot_folder = unsafe { boot_folder.unwrap_unchecked() };
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#[cfg(windows)]
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if args.boot_directory.is_none() {
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eprintln!("You must supply a boot-directory on windows; see --help");
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exit(1);
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}
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#[cfg(windows)]
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let boot_folder = unsafe { args.boot_directory.unwrap_unchecked() };
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let grub_env = boot_folder.join("grub/grubenv");
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if !grub_env.exists() {
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@ -11,5 +52,29 @@ fn main() {
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exit(1);
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}
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println!("{grub_env:?}");
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let grub_env = std::fs::read_to_string(grub_env)?;
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let lines = grub_env.lines().filter(|l| !l.chars().all(|c| c == '#'));
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let modified_lines: Vec<String> = lines
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.map(|l| {
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let seperator_pos = l.find('=').unwrap_or(0usize);
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if &l[..seperator_pos] == "next_entry" {
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[l[..seperator_pos].to_owned(), args.menu_entry.clone()].join("=")
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} else {
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l.to_owned()
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}
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})
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.collect();
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let modified_env = modified_lines.join("\n");
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let padding = "#".repeat(1023 - modified_env.bytes().len());
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let padded_env = [modified_env, padding].join("\n");
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println!("{}", padded_env);
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println!("{}", padded_env.len());
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Ok(())
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}
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